{"id":2610,"date":"2026-04-02T00:00:00","date_gmt":"2026-04-02T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/optical-link-budget-calculation-formula-example\/"},"modified":"2026-06-22T03:38:54","modified_gmt":"2026-06-22T03:38:54","slug":"optical-link-budget-calculation-formula-example","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-link-budget-calculation-formula-example","title":{"rendered":"T\u00ednh to\u00e1n li\u00ean k\u1ebft quang cho module SFP \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"628\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5de9200830314db396aaa1229316b629.jpg\" alt=\"Optical Link Budget Calculation\" class=\"wp-image-2597\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5de9200830314db396aaa1229316b629.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5de9200830314db396aaa1229316b629-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5de9200830314db396aaa1229316b629-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5de9200830314db396aaa1229316b629-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5de9200830314db396aaa1229316b629-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng c\u00e1p quang hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb \u0111\u00f2i h\u1ecfi nhi\u1ec1u h\u01a1n l\u00e0 ch\u1ec9 c\u1eafm m\u1ed9t b\u1ed9 thu ph\u00e1t. M\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t quy\u1ebft \u0111\u1ecbnh li\u1ec7u m\u1ed9t li\u00ean k\u1ebft c\u00f3 ho\u1ea1t \u0111\u1ed9ng ho\u00e0n h\u1ea3o hay kh\u00f4ng ch\u00ednh l\u00e0 <strong>ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/strong>. \u0110\u1ed1i v\u1edbi <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">SFP<\/a> and <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">m\u00f4-\u0111un SFP+<\/a>, ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u0111\u1ecbnh ngh\u0129a m\u1ee9c t\u1ed5n hao t\u00edn hi\u1ec7u quang t\u1ed1i \u0111a \u0111\u01b0\u1ee3c ph\u00e9p gi\u1eefa b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu, nh\u1eb1m \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i v\u1edbi s\u1ed1 l\u1ed7i t\u1ed1i thi\u1ec3u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 b\u1ea3n ch\u1ea5t, ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng ch\u00eanh l\u1ec7ch gi\u1eefa c\u00f4ng su\u1ea5t ph\u00e1t t\u1ed1i thi\u1ec3u v\u00e0 \u0111\u1ed9 nh\u1ea1y thu t\u1ed1i thi\u1ec3u, th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng decibel (dB). Tuy nhi\u00ean, trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf c\u00f2n xu\u1ea5t hi\u1ec7n th\u00eam c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/attenuation-in-optical-transceiver-management-and-solutions\/\">suy hao s\u1ee3i quang<\/a>, t\u1ed5n hao t\u1ea1i \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i, c\u0169ng nh\u01b0 m\u1ed9t bi\u00ean an to\u00e0n \u0111\u1ec3 b\u00f9 cho s\u1ef1 l\u00e3o h\u00f3a linh ki\u1ec7n ho\u1eb7c c\u00e1c sai s\u00f3t trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t. N\u1ebfu t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft, k\u1ebft n\u1ed1i s\u1ee3i quang c\u00f3 th\u1ec3 tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh, d\u1eabn \u0111\u1ebfn l\u1ed7i ng\u1eaft qu\u00e3ng ho\u1eb7c m\u1ea5t ho\u00e0n to\u00e0n li\u00ean k\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 v\u00e0 t\u00ednh to\u00e1n ch\u00ednh x\u00e1c ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang, k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 thi\u1ebft k\u1ebf m\u1ea1ng c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c tri\u1ec3n khai module SFP, l\u1ef1a ch\u1ecdn \u0111\u00fang module ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng lo\u1ea1i s\u1ee3i quang c\u1ee5 th\u1ec3, \u0111\u1ed3ng th\u1eddi ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n, c\u00e1c th\u00e0nh ph\u1ea7n t\u1ed5n hao ch\u00ednh, m\u1ed9t v\u00ed d\u1ee5 t\u1eebng b\u01b0\u1edbc v\u00e0 c\u00e1c m\u1eb9o th\u1ef1c ti\u1ec5n nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c li\u00ean k\u1ebft s\u1ee3i quang b\u1ec1n v\u1eefng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng qua h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n s\u1ebd n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i s\u1ee3i quang d\u1ef1a tr\u00ean SFP ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady, c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u1ea1ng v\u00e0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t khi l\u1eadp k\u1ebf ho\u1ea1ch ho\u1eb7c n\u00e2ng c\u1ea5p m\u1ea1ng s\u1ee3i quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang trong module SFP l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang trong <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">C\u00e1c m\u00f4-\u0111un SFP<\/a> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ed5ng l\u01b0\u1ee3ng t\u1ed5n hao c\u00f4ng su\u1ea5t quang (\u0111\u01b0\u1ee3c \u0111o b\u1eb1ng dB) m\u00e0 m\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c trong khi v\u1eabn duy tr\u00ec giao ti\u1ebfp \u0111\u00e1ng tin c\u1eady gi\u1eefa b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111\u00e2y l\u00e0 \u201cm\u1ee9c cho ph\u00e9p\u201d v\u1ec1 c\u00f4ng su\u1ea5t nh\u1eb1m v\u01b0\u1ee3t qua to\u00e0n b\u1ed9 t\u1ed5n hao trong k\u1ebft n\u1ed1i s\u1ee3i quang, bao g\u1ed3m suy hao s\u1ee3i, \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede c\u1ea5p \u0111\u1ed9 thi\u1ebft b\u1ecb, m\u1ed7i module SFP ho\u1eb7c SFP+ \u0111\u1ec1u c\u00f3 d\u1ea3i c\u00f4ng su\u1ea5t quang \u0111\u1ea7u ra \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh (ph\u00eda b\u1ed9 ph\u00e1t) v\u00e0 \u0111\u1ed9 nh\u1ea1y \u0111\u1ea7u v\u00e0o y\u00eau c\u1ea7u (ph\u00eda b\u1ed9 thu). Ch\u00eanh l\u1ec7ch gi\u1eefa hai gi\u00e1 tr\u1ecb n\u00e0y x\u00e1c \u0111\u1ecbnh m\u1ee9c t\u1ed5n hao t\u00edn hi\u1ec7u s\u1eed d\u1ee5ng t\u1ed1i \u0111a m\u00e0 li\u00ean k\u1ebft c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3. N\u1ebfu t\u1ed5ng t\u1ed5n hao trong h\u1ec7 th\u1ed1ng s\u1ee3i quang v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch n\u00e0y, t\u00edn hi\u1ec7u s\u1ebd tr\u1edf n\u00ean qu\u00e1 y\u1ebfu, d\u1eabn \u0111\u1ebfn m\u1ea5t g\u00f3i tin, li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c ho\u00e0n to\u00e0n th\u1ea5t b\u1ea1i.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ad269f83742149bfbe568533c53aae03.jpg\" alt=\"What Is Optical Link Budget in SFP Modules?\" class=\"wp-image-2598\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ad269f83742149bfbe568533c53aae03.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ad269f83742149bfbe568533c53aae03-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ad269f83742149bfbe568533c53aae03-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ad269f83742149bfbe568533c53aae03-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ad269f83742149bfbe568533c53aae03-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ecbnh ngh\u0129a \u0111\u01a1n gi\u1ea3n<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang = M\u1ee9c t\u1ed5n hao quang t\u1ed1i \u0111a \u0111\u01b0\u1ee3c ph\u00e9p gi\u1eefa b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu SFP trong khi v\u1eabn duy tr\u00ec k\u1ebft n\u1ed1i s\u1ee3i quang \u1ed5n \u0111\u1ecbnh.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u00e1 tr\u1ecb n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng decibel (dB) v\u00e0 x\u00e1c \u0111\u1ecbnh kho\u1ea3ng c\u00e1ch c\u0169ng nh\u01b0 \u0111\u1ed9 tin c\u1eady m\u00e0 t\u00edn hi\u1ec7u quang c\u00f3 th\u1ec3 truy\u1ec1n \u0111i trong m\u1ea1ng s\u1ee3i quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang l\u1ea1i c\u1ef1c k\u1ef3 quan tr\u1ecdng trong m\u1ea1ng SFP \/ SFP+?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c tri\u1ec3n khai s\u1ee3i quang th\u1ef1c t\u1ebf, module SFP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-network-switch\/\">routers<\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-a-data-center\/\">trung t\u00e2m d\u1eef li\u1ec7u<br><\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-in-telecom-meaning-types-applications\/\">m\u1ea1ng vi\u1ec5n th\u00f4ng<\/a>, v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p. Trong nh\u1eefng m\u00f4i tr\u01b0\u1eddng n\u00e0y, ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 tr\u1ef1c ti\u1ebfp quy\u1ebft \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Li\u1ec7u m\u1ed9t li\u00ean k\u1ebft t\u1ed1c \u0111\u1ed9 1G, 10G ho\u1eb7c cao h\u01a1n c\u00f3 thi\u1ebft l\u1eadp th\u00e0nh c\u00f4ng hay kh\u00f4ng<\/p><\/li><li><p>L\u01b0\u1ee3ng t\u1ed5n hao s\u1ee3i (kho\u1ea3ng c\u00e1ch + th\u00e0nh ph\u1ea7n) m\u00e0 h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c<\/p><\/li><li><p>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">t\u1ef7 l\u1ec7 l\u1ed7i<\/a> c\u1ee7a vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u d\u00e0i h\u1ea1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 khi hai module SFP t\u01b0\u01a1ng th\u00edch v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, li\u00ean k\u1ebft v\u1eabn c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i n\u1ebfu ng\u00e2n s\u00e1ch quang kh\u00f4ng \u0111\u1ee7 cho \u0111\u01b0\u1eddng d\u1eabn s\u1ee3i \u0111\u00e3 l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ed1i quan h\u1ec7 gi\u1eefa b\u1ed9 ph\u00e1t, s\u1ee3i quang v\u00e0 b\u1ed9 thu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng d\u00f2ng c\u00f4ng su\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>B\u1ed9 ph\u00e1t (Tx)<\/strong>: T\u1ea1o ra c\u00f4ng su\u1ea5t quang (\u0111\u1ed9 m\u1ea1nh t\u00edn hi\u1ec7u)<\/p><\/li><li><p><strong>Li\u00ean k\u1ebft s\u1ee3i quang<\/strong>: G\u00e2y ra t\u1ed5n hao do kho\u1ea3ng c\u00e1ch v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n v\u1eadt l\u00fd<\/p><\/li><li><p><strong>B\u1ed9 thu (Rx)<\/strong>: Y\u00eau c\u1ea7u m\u1ee9c c\u00f4ng su\u1ea5t quang t\u1ed1i thi\u1ec3u \u0111\u1ec3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u ch\u00ednh x\u00e1c<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa ba y\u1ebfu t\u1ed1 n\u00e0y, \u0111\u1ea3m b\u1ea3o r\u1eb1ng:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>C\u00f4ng su\u1ea5t Tx \u2212 T\u1ed5ng t\u1ed5n hao s\u1ee3i \u2265 \u0110\u1ed9 nh\u1ea1y Rx<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu \u0111i\u1ec1u ki\u1ec7n n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng, b\u1ed9 thu s\u1ebd kh\u00f4ng th\u1ec3 gi\u1ea3i m\u00e3 t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao ch\u1ec9 d\u1ef1a v\u00e0o \u201c\u0111\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch\u201d l\u00e0 sai l\u1ea7m<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong m\u1ea1ng s\u1ee3i quang l\u00e0 cho r\u1eb1ng \u0111\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch c\u1ee7a module SFP (v\u00ed d\u1ee5:, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476764.htm\">10 km<\/a>, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476756.htm\">20 km<\/a>) \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u1edf kho\u1ea3ng c\u00e1ch \u0111\u00f3. Th\u1ef1c t\u1ebf, kho\u1ea3ng c\u00e1ch ch\u1ec9 l\u00e0 m\u1ed9t \u01b0\u1edbc t\u00ednh d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n s\u1ee3i l\u00fd t\u01b0\u1edfng v\u00e0 kh\u00f4ng t\u00ednh \u0111\u1ebfn c\u00e1c t\u1ed5n hao trong tri\u1ec3n khai th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ef1c t\u1ebf, hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i (OS2 so v\u1edbi OM3\/OM4)<\/p><\/li><li><p>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i v\u00e0 b\u1ea3ng \u0111\u1ea5u n\u1ed1i<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 s\u1ed1 l\u01b0\u1ee3ng m\u1ed1i n\u1ed1i<\/p><\/li><li><p>S\u1ef1 suy gi\u1ea3m t\u00edn hi\u1ec7u do \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>Y\u00eau c\u1ea7u v\u1ec1 bi\u00ean an to\u00e0n c\u1ee7a h\u1ec7 th\u1ed1ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 l\u00fd do v\u00ec sao hai module \u201c<a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476763.htm\">SFP 10 km<\/a> \u201d gi\u1ed1ng h\u1ec7t nhau c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng r\u1ea5t kh\u00e1c nhau trong c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng kh\u00e1c nhau. Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i kho\u1ea3ng c\u00e1ch ghi tr\u00ean nh\u00e3n \u2014 m\u1edbi l\u00e0 r\u00e0ng bu\u1ed9c k\u1ef9 thu\u1eadt th\u1ef1c s\u1ef1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00f3m t\u1eaft ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang x\u00e1c \u0111\u1ecbnh m\u1ee9c t\u1ed5n hao t\u00edn hi\u1ec7u t\u1ed1i \u0111a (dB) \u0111\u01b0\u1ee3c ph\u00e9p trong c\u00e1c li\u00ean k\u1ebft s\u1ee3i quang d\u00f9ng SFP<\/p><\/li><li><p>N\u00f3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00f4ng su\u1ea5t Tx, \u0111\u1ed9 nh\u1ea1y Rx v\u00e0 t\u1ed5ng t\u1ed5n hao h\u1ec7 th\u1ed1ng s\u1ee3i<\/p><\/li><li><p>N\u00f3 \u0111\u1ea3m b\u1ea3o giao ti\u1ebfp \u1ed5n \u0111\u1ecbnh tr\u00ean c\u00e1c m\u1ea1ng quang SFP\/SFP+<\/p><\/li><li><p>C\u00e1c \u0111\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch ch\u1ec9 l\u00e0 \u01b0\u1edbc t\u00ednh, kh\u00f4ng ph\u1ea3i \u0111\u1ea3m b\u1ea3o, do \u0111\u00f3 vi\u1ec7c t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft l\u00e0 b\u1eaft bu\u1ed9c<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>Gi\u1ea3i th\u00edch c\u00f4ng th\u1ee9c t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng th\u1ee9c t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang l\u00e0 n\u1ec1n t\u1ea3ng cho m\u1ecdi k\u1ebf ho\u1ea1ch c\u00f4ng su\u1ea5t quang s\u1ee3i d\u00e0nh cho c\u00e1c m\u00f4-\u0111un SFP v\u00e0 SFP+. C\u00f4ng th\u1ee9c n\u00e0y x\u00e1c \u0111\u1ecbnh m\u1ee9c t\u1ed5n hao t\u00edn hi\u1ec7u t\u1ed1i \u0111a m\u00e0 m\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c trong khi v\u1eabn duy tr\u00ec kh\u1ea3 n\u0103ng giao ti\u1ebfp \u0111\u00e1ng tin c\u1eady gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8e0e3291cbfe438a8461a13a30c2bdd3.jpg\" alt=\"Optical Link Budget Calculation Formula Explained\" class=\"wp-image-2599\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8e0e3291cbfe438a8461a13a30c2bdd3.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8e0e3291cbfe438a8461a13a30c2bdd3-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8e0e3291cbfe438a8461a13a30c2bdd3-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8e0e3291cbfe438a8461a13a30c2bdd3-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8e0e3291cbfe438a8461a13a30c2bdd3-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00f4ng th\u1ee9c ch\u00ednh v\u1ec1 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft s\u1ee3i quang<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft (dB) = C\u00f4ng su\u1ea5t ph\u00e1t (t\u1ed1i thi\u1ec3u) \u2212 \u0110\u1ed9 nh\u1ea1y thu (t\u1ed1i thi\u1ec3u)<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng th\u1ee9c n\u00e0y x\u00e1c \u0111\u1ecbnh ng\u01b0\u1ee1ng t\u1ed5n hao quang t\u1ed1i \u0111a c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng s\u1ee3i quang. N\u1ebfu t\u1ed5ng t\u1ed5n hao tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n s\u1ee3i v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb n\u00e0y, li\u00ean k\u1ebft s\u1ebd th\u1ea5t b\u1ea1i ho\u1eb7c tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gi\u1ea3i th\u00edch t\u1eebng bi\u1ebfn s\u1ed1<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 th\u1ef1c hi\u1ec7n ch\u00ednh x\u00e1c ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 hi\u1ec3u r\u00f5 t\u1eebng tham s\u1ed1 trong c\u00f4ng th\u1ee9c:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >C\u00f4ng su\u1ea5t b\u1ed9 ph\u00e1t (C\u00f4ng su\u1ea5t Tx, dBm)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea1i di\u1ec7n cho c\u00f4ng su\u1ea5t \u0111\u1ea7u ra quang do b\u1ed9 ph\u00e1t SFP t\u1ea1o ra<\/p><\/li><li><p>\u0110\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u01a1n v\u1ecb decibel-milliwatt (dBm)<\/p><\/li><li><p>D\u1eef li\u1ec7u k\u1ef9 thu\u1eadt th\u01b0\u1eddng cung c\u1ea5p m\u1ed9t d\u1ea3i gi\u00e1 tr\u1ecb (v\u00ed d\u1ee5: gi\u00e1 tr\u1ecb t\u1ed1i \u0111a v\u00e0 t\u1ed1i thi\u1ec3u)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Trong thi\u1ebft k\u1ebf k\u1ef9 thu\u1eadt, ph\u1ea3i s\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t Tx t\u1ed1i thi\u1ec3u v\u00ec \u0111\u00e2y l\u00e0 k\u1ecbch b\u1ea3n \u0111\u1ea7u ra x\u1ea5u nh\u1ea5t.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >\u0110\u1ed9 nh\u1ea1y b\u1ed9 thu (\u0110\u1ed9 nh\u1ea1y Rx, dBm)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea1i di\u1ec7n cho c\u00f4ng su\u1ea5t quang t\u1ed1i thi\u1ec3u m\u00e0 b\u1ed9 thu c\u1ea7n \u0111\u1ec3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c<\/p><\/li><li><p>C\u0169ng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng dBm<\/p><\/li><li><p>C\u00e1c gi\u00e1 tr\u1ecb th\u1ea5p h\u01a1n (\u00e2m h\u01a1n) cho th\u1ea5y \u0111\u1ed9 nh\u1ea1y t\u1ed1t h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed9 thu c\u00e0ng nh\u1ea1y th\u00ec h\u1ec7 th\u1ed1ng c\u00e0ng ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec1u t\u1ed5n hao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c gi\u00e1 tr\u1ecb x\u1ea5u nh\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong thi\u1ebft k\u1ebf m\u1ea1ng s\u1ee3i quang th\u1ef1c t\u1ebf, vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh ho\u1eb7c trung b\u00ecnh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng s\u1ef1 c\u1ed1 tri\u1ec3n khai nghi\u00eam tr\u1ecdng. C\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng chuy\u00ean nghi\u1ec7p lu\u00f4n \u00e1p d\u1ee5ng nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf theo tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t, ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t ph\u00e1t t\u1ed1i thi\u1ec3u, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00f4ng su\u1ea5t \u0111i\u1ec3n h\u00ecnh<\/p><\/li><li><p>S\u1eed d\u1ee5ng th\u00f4ng s\u1ed1 \u0111\u1ed9 nh\u1ea1y thu t\u1ed1i thi\u1ec3u (ng\u01b0\u1ee1ng tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t)<\/p><\/li><li><p>T\u00ednh \u0111\u1ebfn dung sai s\u1ea3n xu\u1ea5t gi\u1eefa c\u00e1c l\u00f4 SFP kh\u00e1c nhau<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang quan tr\u1ecdng trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un SFP t\u1eeb c\u00e1c nh\u00e0 cung c\u1ea5p kh\u00e1c nhau \u2014 ho\u1eb7c th\u1eadm ch\u00ed t\u1eeb c\u00e1c l\u00f4 s\u1ea3n xu\u1ea5t kh\u00e1c nhau \u2014 c\u00f3 th\u1ec3 ch\u00eanh l\u1ec7ch nh\u1eb9 trong gi\u1edbi h\u1ea1n th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. N\u1ebfu ph\u00e9p t\u00ednh d\u1ef1a tr\u00ean c\u00e1c gi\u00e1 tr\u1ecb l\u1ea1c quan, h\u1ec7 th\u1ed1ng c\u00f3 v\u1ebb ho\u1ea1t \u0111\u1ed9ng trong ki\u1ec3m tra nh\u01b0ng l\u1ea1i th\u1ea5t b\u1ea1i d\u01b0\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/p><\/li><li><p>L\u00e3o h\u00f3a c\u00e1c th\u00e0nh ph\u1ea7n quang<\/p><\/li><li><p>Nhi\u1ec5m b\u1ea9n ho\u1eb7c hao m\u00f2n b\u1ed9 n\u1ed1i<\/p><\/li><li><p>Suy gi\u1ea3m t\u00edn hi\u1ec7u d\u00e0i h\u1ea1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c gi\u00e1 tr\u1ecb tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t \u0111\u1ea3m b\u1ea3o ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang bi\u1ec3u th\u1ecb ranh gi\u1edbi ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng trong:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>```html<\/p><\/li><li><p>C\u00e1c m\u1ea1ng l\u00f5i vi\u1ec5n th\u00f4ng<\/p><\/li><li><p>H\u1ec7 th\u1ed1ng c\u00e1p quang c\u00f4ng nghi\u1ec7p<\/p><\/li><li><p>M\u1ea1ng doanh nghi\u1ec7p \u0111\u1ed9 tin c\u1eady cao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c: c\u00f4ng su\u1ea5t ph\u00e1t (gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t) \u2212 \u0111\u1ed9 nh\u1ea1y thu (gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t)<\/p><\/li><li><p>C\u00f4ng su\u1ea5t ph\u00e1t x\u00e1c \u0111\u1ecbnh c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u \u0111\u1ea7u ra c\u1ee7a b\u1ed9 ph\u00e1t SFP<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y thu x\u00e1c \u0111\u1ecbnh m\u1ee9c t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o t\u1ed1i thi\u1ec3u c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3i m\u00e3 d\u1eef li\u1ec7u<\/p><\/li><li><p>Lu\u00f4n ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c gi\u00e1 tr\u1ecb tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady khi tri\u1ec3n khai th\u1ef1c t\u1ebf<\/p><\/li><li><p>C\u00f4ng th\u1ee9c n\u00e0y l\u00e0 n\u1ec1n t\u1ea3ng cho m\u1ecdi k\u1ebf ho\u1ea1ch ph\u00e2n b\u1ed5 c\u00f4ng su\u1ea5t m\u1ea1ng c\u00e1p quang SFP<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>C\u00e1c th\u00e0nh ph\u1ea7n g\u00e2y t\u1ed5n hao quang trong ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u1ea5t k\u1ef3 ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang n\u00e0o d\u00e0nh cho module SFP, t\u1ed5ng t\u1ed5n hao t\u00edn hi\u1ec7u kh\u00f4ng ch\u1ec9 do kho\u1ea3ng c\u00e1ch s\u1ee3i quang g\u00e2y ra. Thay v\u00e0o \u0111\u00f3, n\u00f3 l\u00e0 t\u1ed5ng c\u1ee7a nhi\u1ec1u lo\u1ea1i t\u1ed5n hao v\u1eadt l\u00fd v\u00e0 li\u00ean quan \u0111\u1ebfn l\u1eafp \u0111\u1eb7t x\u1ea3y ra tr\u00ean to\u00e0n b\u1ed9 \u0111\u01b0\u1eddng d\u1eabn quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch ch\u00ednh x\u00e1c, ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/615c0dd1e4ec4a4e8e3602c1d4fe4a41.jpg\" alt=\"Components of Fiber Optic Loss in Link Budget\" class=\"wp-image-2600\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/615c0dd1e4ec4a4e8e3602c1d4fe4a41.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/615c0dd1e4ec4a4e8e3602c1d4fe4a41-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/615c0dd1e4ec4a4e8e3602c1d4fe4a41-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/615c0dd1e4ec4a4e8e3602c1d4fe4a41-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/615c0dd1e4ec4a4e8e3602c1d4fe4a41-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh g\u00e2y t\u1ed5n hao quang trong li\u00ean k\u1ebft c\u00e1p quang<\/h3>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Th\u00e0nh ph\u1ea7n t\u1ed5n hao<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4 t\u1ea3<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>T\u00e1c \u0111\u1ed9ng l\u00ean ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao do suy gi\u1ea3m s\u1ee3i quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~0,35 dB\/km t\u1ea1i 1310 nm (s\u1ee3i \u0111\u01a1n mode)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao t\u00edn hi\u1ec7u khi \u00e1nh s\u00e1ng truy\u1ec1n qua s\u1ee3i quang theo kho\u1ea3ng c\u00e1ch<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u0103ng t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-distance-real-world-range-optics-explained\/\">kho\u1ea3ng c\u00e1ch<br><\/a><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao do \u0111\u1ea7u n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~0,2\u20130,5 dB tr\u00ean m\u1ed7i c\u1eb7p \u0111\u1ea7u n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao xu\u1ea5t hi\u1ec7n t\u1ea1i m\u1ed7i \u0111i\u1ec3m n\u1ed1i v\u1eadt l\u00fd gi\u1eefa c\u00e1c s\u1ee3i quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u1ed9ng d\u1ed3n qua c\u00e1c b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel) v\u00e0 b\u1ed9 gh\u00e9p n\u1ed1i (coupler)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao do m\u1ed1i n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~0,1 dB tr\u00ean m\u1ed7i m\u1ed1i n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5n hao t\u1ea1i c\u00e1c m\u1ed1i n\u1ed1i h\u00e0n n\u00f3ng ch\u1ea3y (fusion splice) ho\u1eb7c m\u1ed1i n\u1ed1i c\u01a1 h\u1ecdc<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u01b0\u1eddng nh\u1ecf nh\u01b0ng c\u1ed9ng d\u1ed3n tr\u00ean c\u00e1c li\u00ean k\u1ebft d\u00e0i<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>D\u1ef1 ph\u00f2ng an to\u00e0n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>3\u20135 dB (\u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ec7m thi\u1ebft k\u1ebf \u0111\u1ec3 d\u1ef1 ph\u00f2ng cho hi\u1ec7n t\u01b0\u1ee3ng l\u00e3o h\u00f3a, b\u1ee5i b\u1ea9n, u\u1ed1n cong v\u00e0 s\u1eeda ch\u1eefa<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ed5n hao do suy gi\u1ea3m s\u1ee3i quang (t\u1ed5n hao ph\u1ee5 thu\u1ed9c kho\u1ea3ng c\u00e1ch)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suy gi\u1ea3m s\u1ee3i quang l\u00e0 s\u1ef1 gi\u1ea3m d\u1ea7n c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u quang khi \u00e1nh s\u00e1ng truy\u1ec1n qua c\u00e1p s\u1ee3i quang.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed1i v\u1edbi s\u1ee3i \u0111\u01a1n mode (<a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478919.htm\">SMF<\/a>) \u1edf b\u01b0\u1edbc s\u00f3ng 1310 nm, m\u1ee9c suy gi\u1ea3m \u0111i\u1ec3n h\u00ecnh l\u00e0:<\/p><ul><li><p>\u2248 0,35 dB tr\u00ean m\u1ed7i kil\u00f4m\u00e9t<\/p><\/li><\/ul><\/li><li><p>V\u1edbi c\u00e1c b\u01b0\u1edbc s\u00f3ng d\u00e0i h\u01a1n (v\u00ed d\u1ee5: 1550 nm), m\u1ee9c suy gi\u1ea3m c\u00f3 th\u1ec3 th\u1ea5p h\u01a1n (~0,2 dB\/km)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 kho\u1ea3ng c\u00e1ch t\u0103ng tr\u1ef1c ti\u1ebfp l\u00e0m t\u0103ng t\u1ed5ng t\u1ed5n hao quang, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 ch\u00ednh trong vi\u1ec7c tri\u1ec3n khai SFP \u1edf kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ed5n hao \u0111\u1ea7u n\u1ed1i (t\u1ed5n hao giao di\u1ec7n)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i l\u1ea7n k\u1ebft n\u1ed1i s\u1ee3i quang \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n\u2014v\u00ed d\u1ee5 qua b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel), b\u1ed9 chuy\u1ec3n \u0111\u1ed5i (adapter) ho\u1eb7c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-an-sfp-interface\/\">C\u1ed5ng SFP<\/a>\u2014m\u1ed9t ph\u1ea7n t\u00edn hi\u1ec7u s\u1ebd b\u1ecb m\u1ea5t.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao \u0111i\u1ec3n h\u00ecnh tr\u00ean m\u1ed7i c\u1eb7p \u0111\u1ea7u n\u1ed1i:<\/p><ul><li><p>0,2 \u0111\u1ebfn 0,5 dB<\/p><\/li><\/ul><\/li><li><p>C\u00e1c nguy\u00ean nh\u00e2n bao g\u1ed3m:<\/p><ul><li><p>L\u1ec7ch t\u00e2m l\u00f5i s\u1ee3i quang<\/p><\/li><li><p>B\u1ee5i b\u1ea9n ho\u1eb7c nhi\u1ec5m b\u1ea9n<\/p><\/li><li><p>Ph\u1ea3n x\u1ea1 b\u1ec1 m\u1eb7t<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 t\u1ed5n hao \u0111\u1ea7u n\u1ed1i nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 d\u1ef1 ph\u00f2ng trong c\u00e1c ng\u00e2n s\u00e1ch li\u00ean k\u1ebft (link budget) \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ed5n hao m\u1ed1i n\u1ed1i (t\u1ed5n hao m\u1ed1i n\u1ed1i v\u0129nh vi\u1ec5n)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed1i n\u1ed1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 n\u1ed1i v\u0129nh vi\u1ec5n c\u00e1c c\u00e1p s\u1ee3i quang, th\u01b0\u1eddng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng tr\u1ee5c (backbone) ho\u1eb7c l\u1eafp \u0111\u1eb7t ngo\u00e0i tr\u1eddi.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao m\u1ed1i n\u1ed1i \u0111i\u1ec3n h\u00ecnh:<\/p><ul><li><p>~0,1 dB tr\u00ean m\u1ed7i m\u1ed1i n\u1ed1i<\/p><\/li><\/ul><\/li><li><p>C\u00e1c lo\u1ea1i:<\/p><ul><li><p>N\u1ed1i h\u00e0n (fusion splicing) (t\u1ed5n hao th\u1ea5p h\u01a1n, \u1ed5n \u0111\u1ecbnh h\u01a1n)<\/p><\/li><li><p>N\u1ed1i c\u01a1 h\u1ecdc (mechanical splicing) (t\u1ed5n hao h\u01a1i cao h\u01a1n)<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 t\u1eebng m\u1ed1i n\u1ed1i ri\u00eang l\u1ebb c\u00f3 t\u1ed5n hao nh\u1ecf, nh\u01b0ng nhi\u1ec1u m\u1ed1i n\u1ed1i c\u00f3 th\u1ec3 t\u00edch l\u0169y trong c\u00e1c m\u1ea1ng kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >D\u1ef1 ph\u00f2ng an to\u00e0n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1 ph\u00f2ng an to\u00e0n l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n then ch\u1ed1t nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua trong thi\u1ebft k\u1ebf ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u00e1 tr\u1ecb \u0111\u1ec1 xu\u1ea5t:<\/p><ul><li><p>3\u20135 dB<\/p><\/li><\/ul><\/li><li><p>M\u1ee5c \u0111\u00edch:<\/p><ul><li><p>B\u00f9 \u0111\u1eafp cho s\u1ef1 l\u00e3o h\u00f3a c\u1ee7a s\u1ee3i quang<\/p><\/li><li><p>\u0110\u00e1p \u1ee9ng c\u00e1c s\u1eeda ch\u1eefa ho\u1eb7c thay \u0111\u1ed5i trong t\u01b0\u01a1ng lai<\/p><\/li><li><p>H\u1ea5p th\u1ee5 c\u00e1c t\u1ed5n hao b\u1ea5t ng\u1edd (u\u1ed1n cong, nhi\u1ec5m b\u1ea9n, bi\u1ebfn thi\u00ean nhi\u1ec7t \u0111\u1ed9)<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu kh\u00f4ng c\u00f3 d\u1ef1 ph\u00f2ng an to\u00e0n, m\u1ed9t li\u00ean k\u1ebft ban \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng t\u1ed1t c\u00f3 th\u1ec3 tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh theo th\u1eddi gian.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>G\u00f3c nh\u00ecn k\u1ef9 thu\u1eadt<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong thi\u1ebft k\u1ebf s\u1ee3i quang chuy\u00ean nghi\u1ec7p, t\u1ed5ng t\u1ed5n hao quang \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>T\u1ed5ng t\u1ed5n hao = T\u1ed5n hao s\u1ee3i quang + T\u1ed5n hao \u0111\u1ea7u n\u1ed1i + T\u1ed5n hao m\u1ed1i n\u1ed1i + D\u1ef1 ph\u00f2ng an to\u00e0n<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft ch\u1ec9 \u0111\u01b0\u1ee3c coi l\u00e0 h\u1ee3p l\u1ec7 khi:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u2265 T\u1ed5ng t\u1ed5n hao<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh kh\u00f4ng ch\u1ec9 t\u1ea1i th\u1eddi \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t m\u00e0 c\u00f2n trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a n\u00f3.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao s\u1ee3i quang g\u00e2y ra suy hao t\u00edn hi\u1ec7u ph\u1ee5 thu\u1ed9c v\u00e0o kho\u1ea3ng c\u00e1ch (~0,35 dB\/km @1310nm SMF)<\/p><\/li><li><p>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i x\u1ea3y ra t\u1ea1i m\u1ecdi giao di\u1ec7n s\u1ee3i quang (0,2\u20130,5 dB tr\u00ean m\u1ed7i c\u1eb7p)<\/p><\/li><li><p>T\u1ed5n hao m\u1ed1i n\u1ed1i r\u1ea5t nh\u1ecf nh\u01b0ng t\u00edch l\u0169y (~0,1 dB tr\u00ean m\u1ed7i m\u1ed1i n\u1ed1i)<\/p><\/li><li><p>C\u1ea7n d\u1ef1 ph\u00f2ng an to\u00e0n 3\u20135 dB \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady trong th\u1ef1c t\u1ebf<\/p><\/li><li><p>T\u1ed5ng t\u1ed5n hao lu\u00f4n ph\u1ea3i gi\u1eef d\u01b0\u1edbi ng\u01b0\u1ee1ng ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>V\u00ed d\u1ee5 t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang t\u1eebng b\u01b0\u1edbc (10G SFP+)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 c\u00e1ch t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 \u0111i qua m\u1ed9t v\u00ed d\u1ee5 k\u1ef9 thu\u1eadt th\u1ef1c ti\u1ec5n. Ph\u1ea7n n\u00e0y cung c\u1ea5p m\u1ed9t ph\u00e9p t\u00ednh m\u1eabu cho m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\">SFP+ 10G<\/a> li\u00ean k\u1ebft s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n 10 km, \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y theo c\u00e1ch d\u1ec5 theo d\u00f5i, ki\u1ec3m tra v\u00e0 tr\u00edch d\u1eabn trong t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dcd2b589aae2408c97c821d41bc8b46d.jpg\" alt=\"Step-by-Step Optical Link Budget Calculation Example (10G SFP+)\" class=\"wp-image-2601\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dcd2b589aae2408c97c821d41bc8b46d.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dcd2b589aae2408c97c821d41bc8b46d-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dcd2b589aae2408c97c821d41bc8b46d-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dcd2b589aae2408c97c821d41bc8b46d-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/dcd2b589aae2408c97c821d41bc8b46d-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00ecnh hu\u1ed1ng v\u00ed d\u1ee5: Li\u00ean k\u1ebft s\u1ee3i quang SFP+ 10G, 10 km<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang ta s\u1ebd t\u00ednh to\u00e1n xem li\u00ean k\u1ebft quang c\u00f3 h\u1ee3p l\u1ec7 hay kh\u00f4ng d\u1ef1a tr\u00ean c\u00e1c th\u00e0nh ph\u1ea7n suy hao th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u00e3 cho:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lo\u1ea1i s\u1ee3i: S\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (SMF, OS2)<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch: 10 km<\/p><\/li><li><p>Module: SFP+ 10G (tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh l\u1edbp LR)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh c\u00e1c th\u00f4ng s\u1ed1 c\u00f4ng su\u1ea5t quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00f4ng su\u1ea5t b\u1ed9 ph\u00e1t (Tx)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Tx t\u1ed1i thi\u1ec3u: -8 dBm<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 nh\u1ea1y b\u1ed9 thu (Rx)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 nh\u1ea1y Rx t\u1ed1i thi\u1ec3u: -16 dBm<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 2: T\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c chu\u1ea9n:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft = Tx(min) \u2212 \u0110\u1ed9 nh\u1ea1y Rx<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft = (\u22128) \u2212 (\u221216) = 8 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714\ufe0f Ng\u00e2n s\u00e1ch quang kh\u1ea3 d\u1ee5ng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>8 dB t\u1ed5ng suy hao cho ph\u00e9p<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 3: T\u00ednh suy hao li\u00ean k\u1ebft th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e2y gi\u1edd ch\u00fang ta t\u00ednh to\u00e0n b\u1ed9 suy hao quang th\u1ef1c t\u1ebf trong h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >1 Suy hao do suy gi\u1ea3m s\u1ee3i<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Suy gi\u1ea3m SMF \u0111i\u1ec3n h\u00ecnh t\u1ea1i b\u01b0\u1edbc s\u00f3ng 1310 nm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>0,35 dB\/km<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">0,35 \u00d7 10 = 3,5 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714\ufe0f Suy hao s\u1ee3i = 3,5 dB<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >2 Suy hao do \u0111\u1ea7u n\u1ed1i<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>2 c\u1eb7p \u0111\u1ea7u n\u1ed1i (b\u00ean ph\u00e1t + b\u00ean thu)<\/p><\/li><li><p>0,5 dB m\u1ed7i c\u1eb7p \u0111\u1ea7u n\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">2 \u00d7 0,5 = 1,0 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714\ufe0f Suy hao \u0111\u1ea7u n\u1ed1i = 1,0 dB<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >3 Suy hao do m\u1ed1i n\u1ed1i<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3 s\u1eed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>2 m\u1ed1i n\u1ed1i tr\u00ean tuy\u1ebfn<\/p><\/li><li><p>0,1 dB m\u1ed7i m\u1ed1i n\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">2 \u00d7 0,1 = 0,2 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714\ufe0f Suy hao m\u1ed1i n\u1ed1i = 0,2 dB<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" >4 D\u1ef1 ph\u00f2ng an to\u00e0n<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1 ph\u00f2ng khuy\u1ebfn ngh\u1ecb trong ng\u00e0nh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>3 dB<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714\ufe0f D\u1ef1 ph\u00f2ng an to\u00e0n = 3,0 dB<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 4: T\u00ednh t\u1ed5ng suy hao quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"text-align: center;\">T\u1ed5ng suy hao = 3,5 + 1,0 + 0,2 + 3,0 <br\/>T\u1ed5ng suy hao = 7,7 dB<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u01b0\u1edbc 5: Ki\u1ec3m tra cu\u1ed1i c\u00f9ng \u0110\u1ea0T \/ KH\u00d4NG \u0110\u1ea0T<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>So s\u00e1nh:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>Tham s\u1ed1<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Value<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang (Optical Link Budget)<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>8 dB<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed5ng suy hao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>7,7 dB<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2714\ufe0f K\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>8 dB (Ng\u00e2n s\u00e1ch) &gt; 7,7 dB (Suy hao)<br\/>TR\u1ea0NG TH\u00c1I LI\u00caN K\u1ebeT: \u0110\u1ea0T (K\u1ebft n\u1ed1i h\u1ee3p l\u1ec7 v\u00e0 \u1ed5n \u0111\u1ecbnh)<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >Di\u1ec5n gi\u1ea3i k\u1ef9 thu\u1eadt <\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft qu\u1ea3 n\u00e0y c\u00f3 ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>The <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475852.htm\">Li\u00ean k\u1ebft SFP+<\/a> ho\u1ea1t \u0111\u1ed9ng trong gi\u1edbi h\u1ea1n c\u00f4ng su\u1ea5t quang an to\u00e0n<\/p><\/li><li><p>Ngay c\u1ea3 khi c\u00f3 suy hao do s\u1ee3i v\u00e0 \u0111\u1ea7u n\u1ed1i, t\u00edn hi\u1ec7u v\u1eabn \u1ed5n \u0111\u1ecbnh<\/p><\/li><li><p>\u0110\u1ec7m an to\u00e0n 3 dB \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, \u0111\u00e2y l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf c\u00f3 hi\u1ec7u su\u1ea5t \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n, ngh\u0129a l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ea5t k\u1ef3 \u0111\u1ea7u n\u1ed1i b\u1ed5 sung n\u00e0o<\/p><\/li><li><p>\u0110\u1ea7u s\u1ee3i quang b\u1ea9n<\/p><\/li><li><p>U\u1ed1n cong c\u00e1p ho\u1eb7c l\u00e3o h\u00f3a c\u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ec7m an to\u00e0n v\u00e0 \u0111\u1ea9y li\u00ean k\u1ebft v\u00e0o tr\u1ea1ng th\u00e1i l\u1ed7i.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang x\u00e1c \u0111\u1ecbnh t\u1ed5n hao t\u00edn hi\u1ec7u t\u1ed1i \u0111a cho ph\u00e9p trong c\u00e1c li\u00ean k\u1ebft SFP<\/p><\/li><li><p>V\u00ed d\u1ee5: ng\u00e2n s\u00e1ch li\u00ean k\u1ebft SFP+ 10G = 8 dB (t\u00ednh to\u00e1n gi\u1eefa c\u00f4ng su\u1ea5t ph\u00e1t \u2212 \u0111\u1ed9 nh\u1ea1y thu)<\/p><\/li><li><p>T\u1ed5ng t\u1ed5n hao bao g\u1ed3m:<\/p><ul><li><p>suy hao s\u1ee3i quang (ph\u1ee5 thu\u1ed9c kho\u1ea3ng c\u00e1ch)<\/p><\/li><li><p>t\u1ed5n hao \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>t\u1ed5n hao m\u1ed1i n\u1ed1i<\/p><\/li><li><p>\u0111\u1ec7m an to\u00e0n<\/p><\/li><\/ul><\/li><li><p>Li\u00ean k\u1ebft h\u1ee3p l\u1ec7 khi ng\u00e2n s\u00e1ch &gt; t\u1ed5ng t\u1ed5n hao<\/p><\/li><li><p>Thi\u1ebft k\u1ebf th\u1ef1c t\u1ebf lu\u00f4n ph\u1ea3i bao g\u1ed3m \u0111\u1ec7m an to\u00e0n t\u1eeb 3\u20135 dB<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang so v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 tri\u1ec3n khai th\u1ef1c t\u1ebf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang cung c\u1ea5p m\u00f4 h\u00ecnh k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c cho thi\u1ebft k\u1ebf s\u1ee3i quang, nh\u01b0ng vi\u1ec7c tri\u1ec3n khai th\u1ef1c t\u1ebf th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng kh\u00e1c bi\u1ec7t. Tr\u00ean th\u1ef1c t\u1ebf, nhi\u1ec1u s\u1ef1 c\u1ed1 li\u00ean k\u1ebft SFP v\u00e0 SFP+ kh\u00f4ng x\u1ea3y ra do ng\u00e2n s\u00e1ch l\u00fd thuy\u1ebft sai, m\u00e0 do c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf g\u00e2y ra th\u00eam c\u00e1c t\u1ed5n hao ngo\u00e0i d\u1ef1 ki\u1ebfn. <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/5-steps-transceiver-installation-success\/\">quy tr\u00ecnh l\u1eafp \u0111\u1eb7t<\/a> C\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf g\u00e2y ra th\u00eam c\u00e1c t\u1ed5n hao ngo\u00e0i d\u1ef1 ki\u1ebfn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng ch\u00eanh l\u1ec7ch gi\u1eefa l\u00fd thuy\u1ebft v\u00e0 th\u1ef1c t\u1ebf l\u00e0 m\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t d\u1eabn \u0111\u1ebfn li\u00ean k\u1ebft s\u1ee3i quang kh\u00f4ng \u1ed5n \u0111\u1ecbnh, m\u1ea5t k\u1ebft n\u1ed1i ng\u1eaft qu\u00e3ng ho\u1eb7c l\u1ed7i li\u00ean k\u1ebft b\u1ea5t ng\u1edd trong m\u1ea1ng s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c1ddedbdb6c495b948c2829a1f7eba3.jpg\" alt=\"Optical Link Budget vs. Real-World Deployment Issues\" class=\"wp-image-2602\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c1ddedbdb6c495b948c2829a1f7eba3.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c1ddedbdb6c495b948c2829a1f7eba3-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c1ddedbdb6c495b948c2829a1f7eba3-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c1ddedbdb6c495b948c2829a1f7eba3-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/9c1ddedbdb6c495b948c2829a1f7eba3-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao ng\u00e2n s\u00e1ch l\u00fd thuy\u1ebft kh\u00e1c v\u1edbi tri\u1ec3n khai th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong ph\u00e9p t\u00ednh l\u00fd t\u01b0\u1edfng, t\u1ea5t c\u1ea3 c\u00e1c th\u00f4ng s\u1ed1 (c\u00f4ng su\u1ea5t ph\u00e1t, \u0111\u1ed9 nh\u1ea1y thu, t\u1ed5n hao s\u1ee3i quang) \u0111\u1ec1u \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. Tuy nhi\u00ean, m\u00f4i tr\u01b0\u1eddng th\u1ef1c t\u1ebf l\u00e0m ph\u00e1t sinh c\u00e1c y\u1ebfu t\u1ed1 bi\u1ebfn \u0111\u1ed5i nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Sai l\u1ec7ch dung sai s\u1ea3n xu\u1ea5t gi\u1eefa c\u00e1c module SFP<\/p><\/li><li><p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>\u1ee8ng su\u1ea5t m\u00f4i tr\u01b0\u1eddng (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceivers-operating-temperature-range\/\">nhi\u1ec7t \u0111\u1ed9<br><\/a>, rung \u0111\u1ed9ng)<\/p><\/li><li><p>L\u00e3o h\u00f3a \u0111\u1ea7u n\u1ed1i v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Do \u0111\u00f3, m\u1ed9t li\u00ean k\u1ebft tr\u00f4ng \u201ch\u1ee3p l\u1ec7 tr\u00ean gi\u1ea5y\u201d c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng g\u1ea7n ho\u1eb7c d\u01b0\u1edbi ng\u01b0\u1ee1ng hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ea7u n\u1ed1i b\u1ea9n v\u00e0 t\u1ed5n hao ch\u00e8n (v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u1ea5t)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o trong th\u1ef1c t\u1ebf g\u00e2y ra l\u1ed7i li\u00ean k\u1ebft (c\u0169ng \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn r\u1ed9ng r\u00e3i trong c\u00e1c c\u1ed9ng \u0111\u1ed3ng m\u1ea1ng nh\u01b0 Reddit) l\u00e0 nhi\u1ec5m b\u1ea9n \u0111\u1ea7u n\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1ch th\u1ee9c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ng\u00e2n s\u00e1ch li\u00ean k\u1ebft:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ee5i ho\u1eb7c d\u1ea7u tr\u00ean \u0111\u1ea7u s\u1ee3i quang l\u00e0m t\u0103ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceiver-insertion-loss-definition-impact\/\">t\u1ed5n hao ch\u00e8n<\/a><\/p><\/li><li><p>Ngay c\u1ea3 nhi\u1ec5m b\u1ea9n vi m\u00f4 c\u0169ng c\u00f3 th\u1ec3 g\u00e2y th\u00eam t\u1ed5n hao ngo\u00e0i d\u1ef1 ki\u1ebfn t\u1eeb 0,5\u20133 dB<\/p><\/li><li><p>Vi\u1ec7c c\u1eafm r\u00fat l\u1eb7p l\u1ea1i l\u00e0m tr\u1ea7m tr\u1ecdng th\u00eam t\u00ecnh tr\u1ea1ng suy gi\u1ea3m b\u1ec1 m\u1eb7t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Th\u00f4ng tin th\u1ef1c ti\u1ec5n:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Nhi\u1ec1u hi\u1ec7n t\u01b0\u1ee3ng \u201cb\u00ed \u1ea9n <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-issue-troubleshooting-guide\/\">l\u1ed7i SFP<\/a>\u201d \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft \u0111\u01a1n gi\u1ea3n b\u1eb1ng c\u00e1ch l\u00e0m s\u1ea1ch c\u00e1c \u0111\u1ea7u n\u1ed1i LC ho\u1eb7c thay d\u00e2y c\u00e1p n\u1ed1i.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >Hi\u1ec7n t\u01b0\u1ee3ng u\u1ed1n cong v\u00e0 l\u00e3o h\u00f3a s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/fiber-optic-cable-what-it-is-and-how-it-works-explained\/\">C\u00e1p s\u1ee3i quang<\/a> r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 ch\u00ednh bao g\u1ed3m:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao do u\u1ed1n cong v\u0129 m\u00f4 (u\u1ed1n cong c\u00e1p qu\u00e1 ch\u1eb7t)<\/p><\/li><li><p>T\u1ed5n hao do u\u1ed1n cong vi m\u00f4 (\u00e1p l\u1ef1c t\u1eeb d\u00e2y bu\u1ed9c c\u00e1p ho\u1eb7c khay c\u00e1p)<\/p><\/li><li><p>Suy gi\u1ea3m v\u1eadt li\u1ec7u theo th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn ng\u00e2n s\u00e1ch li\u00ean k\u1ebft (link budget):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao ngo\u00e0i d\u1ef1 ki\u1ebfn b\u1ed5 sung<\/p><\/li><li><p>C\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m bi\u00ean d\u1ef1 ph\u00f2ng xu\u1ed1ng d\u01b0\u1edbi ng\u01b0\u1ee1ng an to\u00e0n<\/p><\/li><li><p>Th\u01b0\u1eddng mang t\u00ednh gi\u00e1n \u0111o\u1ea1n v\u00e0 kh\u00f3 ch\u1ea9n \u0111o\u00e1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0111i d\u00e2y trung t\u00e2m d\u1eef li\u1ec7u m\u1eadt \u0111\u1ed9 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Hi\u1ec3u sai v\u1ec1 \u201c\u0110\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch\u201d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t quan ni\u1ec7m k\u1ef9 thu\u1eadt sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u201cM\u1ed9t module SFP 10 km lu\u00f4n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch l\u00ean t\u1edbi 10 km\u201d<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, trong tri\u1ec3n khai th\u1ef1c t\u1ebf: <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch KH\u00d4NG \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng v\u00ec n\u00f3 b\u1ecf qua:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>T\u1ed5n hao t\u1ea1i b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel)<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng m\u1ed1i h\u00e0n n\u1ed1i s\u1ee3i<\/p><\/li><li><p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 lo\u1ea1i s\u1ee3i (OS2 so v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng h\u1ed7n h\u1ee3p)<\/p><\/li><li><p>\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>S\u1ef1 th\u1eadt k\u1ef9 thu\u1eadt: <\/strong>Kho\u1ea3ng c\u00e1ch l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb g\u1ea7n \u0111\u00fang mang t\u00ednh ti\u1ebfp th\u1ecb \u2014 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft m\u1edbi l\u00e0 quy t\u1eafc thi\u1ebft k\u1ebf th\u1ef1c s\u1ef1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ea7m quan tr\u1ecdng c\u1ee7a DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module SFP v\u00e0 SFP+ hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng t\u00edch h\u1ee3p <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\">DOM<\/a> (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1), \u0111i\u1ec1u ki\u1ec7n thi\u1ebft y\u1ebfu cho vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 trong th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng g\u00ec DOM cung c\u1ea5p:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (Tx) theo th\u1eddi gian th\u1ef1c<\/p><\/li><li><p>C\u00f4ng su\u1ea5t thu (Rx) theo th\u1eddi gian th\u1ef1c<\/p><\/li><li><p>Gi\u00e1m s\u00e1t nhi\u1ec7t \u0111\u1ed9<\/p><\/li><li><p>Gi\u00e1m s\u00e1t \u0111i\u1ec7n \u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u00fd do DOM thi\u1ebft y\u1ebfu trong tri\u1ec3n khai:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DOM cho ph\u00e9p k\u1ef9 s\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ph\u00e1t hi\u1ec7n suy gi\u1ea3m bi\u00ean d\u1ef1 ph\u00f2ng tr\u01b0\u1edbc khi x\u1ea3y ra s\u1ef1 c\u1ed1<\/p><\/li><li><p>X\u00e1c \u0111\u1ecbnh \u0111\u1ea7u n\u1ed1i b\u1ecb b\u1ea9n (c\u00f4ng su\u1ea5t Rx th\u1ea5p)<\/p><\/li><li><p>Ph\u00e1t hi\u1ec7n c\u00e1c tuy\u1ebfn s\u1ee3i b\u1ecb l\u1ed7i ho\u1eb7c module ph\u00e1t y\u1ebfu<\/p><\/li><li><p>So s\u00e1nh hi\u1ec7u n\u0103ng quang h\u1ecdc th\u1ef1c t\u1ebf v\u1edbi hi\u1ec7u n\u0103ng k\u1ef3 v\u1ecdng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u1eb8O: <\/strong><br\/>Trong thi\u1ebft k\u1ebf m\u1ea1ng s\u1ee3i quang chuy\u00ean nghi\u1ec7p, \u0111i\u1ec3m kh\u00e1c bi\u1ec7t then ch\u1ed1t gi\u1eefa c\u00e1c li\u00ean k\u1ebft \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u00f4ng \u1ed5n \u0111\u1ecbnh kh\u00f4ng n\u1eb1m \u1edf c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n, m\u00e0 \u1edf:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>M\u1ee9c \u0111\u1ed9 t\u1ed5n hao th\u1ef1c t\u1ebf v\u01b0\u1ee3t qu\u00e1 bi\u00ean d\u1ef1 ph\u00f2ng ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang \u0111\u00e3 t\u00ednh to\u00e1n<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ef9 s\u01b0 gi\u00e0u kinh nghi\u1ec7m lu\u00f4n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Thi\u1ebft k\u1ebf v\u1edbi bi\u00ean d\u1ef1 ph\u00f2ng an to\u00e0n t\u1eeb 3\u20135 dB<\/p><\/li><li><p>Ki\u1ec3m tra hi\u1ec7u n\u0103ng b\u1eb1ng c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ecdc t\u1eeb DOM<\/p><\/li><li><p>Coi \u0111\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch ch\u1ec9 l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o th\u1ee9 c\u1ea5p<\/p><\/li><li><p>\u01afu ti\u00ean c\u00f4ng su\u1ea5t quang \u0111o \u0111\u01b0\u1ee3c th\u1ef1c t\u1ebf h\u01a1n c\u00e1c gi\u1ea3 \u0111\u1ecbnh l\u00fd thuy\u1ebft<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft s\u1ee3i quang trong th\u1ef1c t\u1ebf th\u01b0\u1eddng l\u1ec7ch kh\u1ecfi c\u00e1c t\u00ednh to\u00e1n l\u00fd thuy\u1ebft v\u1ec1 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/p><\/li><li><p>C\u00e1c \u0111\u1ea7u n\u1ed1i b\u1ea9n c\u00f3 th\u1ec3 g\u00e2y ra t\u1ed5n hao ch\u00e8n \u0111\u00e1ng k\u1ec3 v\u00e0 l\u00e0m m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/p><\/li><li><p>\u0110\u1ed9 cong v\u00e0 l\u00e3o h\u00f3a s\u1ee3i quang l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u th\u1ef1c t\u1ebf theo th\u1eddi gian<\/p><\/li><li><p>C\u00e1c th\u00f4ng s\u1ed1 kho\u1ea3ng c\u00e1ch kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c tham s\u1ed1 thi\u1ebft k\u1ebf \u0111\u00e1ng tin c\u1eady so v\u1edbi ph\u00e2n t\u00edch ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/p><\/li><li><p>Gi\u00e1m s\u00e1t DOM l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e1c th\u1ef1c m\u1ee9c c\u00f4ng su\u1ea5t quang th\u1ef1c t\u1ebf trong c\u00e1c m\u1ea1ng SFP<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>C\u00e1ch T\u1ed1i \u01b0u H\u00f3a Ng\u00e2n s\u00e1ch Li\u00ean k\u1ebft Quang cho M\u1ea1ng SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang trong c\u00e1c m\u1ea1ng SFP v\u00e0 SFP+ l\u00e0 \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t s\u1ee3i quang \u1ed5n \u0111\u1ecbnh v\u00e0 b\u1ec1n v\u1eefng d\u00e0i h\u1ea1n. M\u1eb7c d\u00f9 vi\u1ec7c t\u00ednh to\u00e1n ch\u00ednh x\u00e1c x\u00e1c \u0111\u1ecbnh li\u1ec7u m\u1ed9t li\u00ean k\u1ebft <em>c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c hay kh\u00f4ng<\/em>, th\u00ec vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a l\u1ea1i quy\u1ebft \u0111\u1ecbnh li\u1ec7u li\u00ean k\u1ebft \u0111\u00f3 c\u00f3 duy tr\u00ec \u0111\u1ed9 tin c\u1eady d\u01b0\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf, qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a v\u00e0 nh\u1eefng thay \u0111\u1ed5i m\u00f4i tr\u01b0\u1eddng hay kh\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n n\u00e0y cung c\u1ea5p danh s\u00e1ch ki\u1ec3m tra k\u1ef9 thu\u1eadt th\u1ef1c ti\u1ec5n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf nh\u1eb1m t\u1ed1i \u0111a h\u00f3a \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a li\u00ean k\u1ebft v\u00e0 gi\u1ea3m t\u1ed5n hao quang.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c00684f81ca440bb86807efa4eb2eb9c.jpg\" alt=\"How to Optimize Optical Link Budget for SFP Networks\" class=\"wp-image-2603\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c00684f81ca440bb86807efa4eb2eb9c.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c00684f81ca440bb86807efa4eb2eb9c-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c00684f81ca440bb86807efa4eb2eb9c-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c00684f81ca440bb86807efa4eb2eb9c-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c00684f81ca440bb86807efa4eb2eb9c-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Ph\u00f9 h\u1ee3p lo\u1ea1i m\u00f4-\u0111un SFP (LR \/ SR \/ ER)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u01b0\u1edbc t\u1ed1i \u01b0u h\u00f3a \u0111\u1ea7u ti\u00ean v\u00e0 quan tr\u1ecdng nh\u1ea5t l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang l\u1edbp quang h\u1ecdc SFP ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i s\u1ee3i quang v\u00e0 y\u00eau c\u1ea7u kho\u1ea3ng c\u00e1ch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c lo\u1ea1i m\u00f4-\u0111un ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\"><strong>SR<\/strong><\/a><strong> (Ph\u1ea1m vi ng\u1eafn)<\/strong> \u2192 S\u1ee3i quang \u0111a mode (MMF, OM3\/OM4), kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\"><strong>LR<\/strong><\/a><strong> (Ph\u1ea1m vi xa)<\/strong> \u2192 S\u1ee3i quang \u0111\u01a1n mode (SMF, l\u00ean \u0111\u1ebfn ~10 km)<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/475852.htm\"><strong>ER<\/strong><\/a><strong> (Ph\u1ea1m vi m\u1edf r\u1ed9ng)<\/strong> \u2192 C\u00e1c li\u00ean k\u1ebft SMF kho\u1ea3ng c\u00e1ch xa (th\u01b0\u1eddng t\u1eeb 40 km tr\u1edf l\u00ean)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean t\u1eafc t\u1ed1i \u01b0u h\u00f3a: Lu\u00f4n ph\u1ed1i h\u1ee3p \u0111\u00fang l\u1edbp c\u00f4ng su\u1ea5t quang + lo\u1ea1i s\u1ee3i quang + y\u00eau c\u1ea7u kho\u1ea3ng c\u00e1ch \u0111\u1ec3 tr\u00e1nh l\u00e3ng ph\u00ed bi\u00ean d\u1ef1 ph\u00f2ng ho\u1eb7c th\u1ea5t b\u1ea1i li\u00ean k\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i (t\u1ed1i thi\u1ec3u h\u00f3a t\u1ed5n hao ch\u00e8n)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i \u0111\u1ea7u n\u1ed1i g\u00e2y ra t\u1ed5n hao t\u00edn hi\u1ec7u \u0111o \u0111\u01b0\u1ee3c, l\u00e0m gi\u1ea3m tr\u1ef1c ti\u1ebfp ng\u00e2n s\u00e1ch li\u00ean k\u1ebft kh\u1ea3 d\u1ee5ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u1ea2nh h\u01b0\u1edfng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao 0,2\u20130,5 dB tr\u00ean m\u1ed7i c\u1eb7p \u0111\u1ea7u n\u1ed1i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c chi\u1ebfn l\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c b\u1ea3ng \u0111\u1ea5u n\u1ed1i kh\u00f4ng c\u1ea7n thi\u1ebft<\/p><\/li><li><p>S\u1eed d\u1ee5ng \u0111\u01b0\u1eddng ch\u1ea1y s\u1ee3i quang tr\u1ef1c ti\u1ebfp khi c\u00f3 th\u1ec3<\/p><\/li><li><p>T\u1eadp trung h\u00f3a c\u00e1c \u0111i\u1ec3m \u0111\u1ea5u n\u1ed1i ch\u00e9o<\/p><\/li><li><p>B\u1ea3o \u0111\u1ea3m \u0111\u1ed9 s\u1ea1ch c\u1ee7a c\u00e1c giao di\u1ec7n LC\/SC<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>S\u1ed1 \u0111i\u1ec3m n\u1ed1i \u00edt h\u01a1n = bi\u00ean d\u1ef1 ph\u00f2ng quang cao h\u01a1n + \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh d\u00e0i h\u1ea1n t\u1ed1t h\u01a1n<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1eed d\u1ee5ng s\u1ee3i quang \u0111\u01a1n mode ch\u1ea5t l\u01b0\u1ee3ng cao (OS2)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn suy hao v\u00e0 hi\u1ec7u n\u0103ng \u1edf kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lo\u1ea1i s\u1ee3i quang \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang \u0111\u01a1n mode OS2<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u1ee3i \u00edch:<br><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Suy hao th\u1ea5p (~0,35 dB\/km \u1edf b\u01b0\u1edbc s\u00f3ng 1310 nm)<\/p><\/li><li><p>Hi\u1ec7u n\u0103ng \u1edf kho\u1ea3ng c\u00e1ch xa t\u1ed1t h\u01a1n<\/p><\/li><li><p>Truy\u1ec1n d\u1eabn quang \u1ed5n \u0111\u1ecbnh h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tr\u00e1nh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft h\u1ee3p c\u00e1c lo\u1ea1i s\u1ee3i quang kh\u00e1c nhau (chuy\u1ec3n \u0111\u1ed5i gi\u1eefa MMF v\u00e0 SMF)<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u00e1p ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p ho\u1eb7c \u0111\u00e3 c\u0169<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u1ea3i thi\u1ec7n quy tr\u00ecnh l\u1eafp \u0111\u1eb7t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n ch\u00ednh x\u00e1c c\u0169ng c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i do ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp \u0111\u1eb7t k\u00e9m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea3m b\u1ea3o l\u00e0m s\u1ea1ch s\u1ee3i quang \u0111\u00fang c\u00e1ch tr\u01b0\u1edbc khi k\u1ebft n\u1ed1i<\/p><\/li><li><p>Tr\u00e1nh u\u1ed1n cong qu\u00e1 m\u1ee9c (ng\u0103n t\u1ed5n th\u1ea5t do u\u1ed1n cong v\u0129 m\u00f4)<\/p><\/li><li><p>Duy tr\u00ec b\u00e1n k\u00ednh u\u1ed1n c\u00e1p ph\u00f9 h\u1ee3p<\/p><\/li><li><p>S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 \u0111\u1ea7u n\u1ed1i v\u00e0 thi\u1ebft b\u1ecb h\u00e0n n\u1ed1i \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin th\u1ef1c t\u1ebf<strong>: <\/strong>Ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp \u0111\u1eb7t th\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a li\u00ean k\u1ebft nhi\u1ec1u h\u01a1n so v\u1edbi thi\u1ebft k\u1ebf quang h\u1ecdc l\u00fd thuy\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Duy tr\u00ec bi\u00ean an to\u00e0n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u00ean an to\u00e0n l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 t\u1ed1i \u01b0u h\u00f3a quan tr\u1ecdng nh\u1ea5t nh\u01b0ng th\u01b0\u1eddng b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u00ean \u0111\u1ec1 xu\u1ea5t:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1i thi\u1ec3u 3\u20135 dB<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u00f9 \u0111\u1eafp cho c\u00e1c y\u1ebfu t\u1ed1 sau:<\/p><ul><li><p>L\u00e3o h\u00f3a \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>T\u00edch t\u1ee5 b\u1ee5i b\u1ea9n<\/p><\/li><li><p>Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/p><\/li><li><p>M\u1edf r\u1ed9ng m\u1ea1ng trong t\u01b0\u01a1ng lai<\/p><\/li><li><p>T\u1ed5n th\u1ea5t ch\u00e8n v\u00e0o do s\u1eeda ch\u1eefa<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nguy\u00ean l\u00fd k\u1ef9 thu\u1eadt<strong>: <\/strong>M\u1ed9t li\u00ean k\u1ebft kh\u00f4ng c\u00f3 bi\u00ean an to\u00e0n l\u00e0 li\u00ean k\u1ebft \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 th\u1ea5t b\u1ea1i trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong thi\u1ebft k\u1ebf m\u1ea1ng s\u1ee3i quang chuy\u00ean nghi\u1ec7p, vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a kh\u00f4ng ch\u1ec9 nh\u1eb1m \u0111\u00e1p \u1ee9ng ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u2014 m\u00e0 c\u00f2n nh\u1eb1m b\u1ea3o v\u1ec7 bi\u00ean an to\u00e0n theo th\u1eddi gian.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thi\u1ebft k\u1ebf m\u1ea1ng SFP b\u1ec1n v\u1eefng tu\u00e2n theo quy t\u1eafc n\u00e0y:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft kh\u1ea3 d\u1ee5ng \u2212 T\u1ed5ng t\u1ed5n th\u1ea5t \u2265 Bi\u00ean an to\u00e0n<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu \u0111i\u1ec1u ki\u1ec7n n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n, li\u00ean k\u1ebft c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng ban \u0111\u1ea7u nh\u01b0ng s\u1ebd suy gi\u1ea3m d\u01b0\u1edbi \u00e1p l\u1ef1c v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i \u0111\u00fang module SFP: SR (s\u1ee3i \u0111a mode), LR\/ER (s\u1ee3i \u0111\u01a1n mode)<\/p><\/li><li><p>Gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i \u0111\u1ec3 t\u1ed1i thi\u1ec3u h\u00f3a t\u1ed5n th\u1ea5t ch\u00e8n v\u00e0o<\/p><\/li><li><p>S\u1eed d\u1ee5ng c\u00e1p OS2 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/single-mode-fiber-os1-vs-os2-comparison-indoor-outdoor-use\/\">s\u1ee3i quang \u0111\u01a1n mode<\/a> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>Tu\u00e2n th\u1ee7 \u0111\u00fang quy tr\u00ecnh l\u1eafp \u0111\u1eb7t \u0111\u1ec3 tr\u00e1nh c\u00e1c t\u1ed5n th\u1ea5t v\u00f4 h\u00ecnh<\/p><\/li><li><p>Lu\u00f4n duy tr\u00ec bi\u00ean an to\u00e0n t\u1eeb 3\u20135 dB \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ed5n \u0111\u1ecbnh d\u00e0i h\u1ea1n<\/p><\/li><li><p>T\u1ed1i \u01b0u h\u00f3a kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i, m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i c\u1ee7a m\u1ea1ng<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang m\u00e0 k\u1ef9 s\u01b0 th\u01b0\u1eddng m\u1eafc ph\u1ea3i<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ngay c\u1ea3 nh\u1eefng k\u1ef9 s\u01b0 m\u1ea1ng gi\u00e0u kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 m\u1eafc sai l\u1ea7m khi th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang cho <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">module quang<br><\/a>. Nh\u1eefng l\u1ed7i n\u00e0y th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn c\u00e1c li\u00ean k\u1ebft s\u1ee3i quang kh\u00f4ng \u1ed5n \u0111\u1ecbnh, th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng b\u1ea5t ng\u1edd ho\u1eb7c nh\u1eefng gi\u1ea3 \u0111\u1ecbnh sai l\u1ec7ch v\u1ec1 dung l\u01b0\u1ee3ng m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c m\u1ea1ng quang s\u1ee3i ch\u00ednh x\u00e1c, \u0111\u00e1ng tin c\u1eady v\u00e0 \u0111\u1ea1t ti\u00eau chu\u1ea9n s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b3446cddfda454fb4f9b3fe2c3c0a63.jpg\" alt=\"Common Optical Link Budget Mistakes Engineers Make\" class=\"wp-image-2604\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b3446cddfda454fb4f9b3fe2c3c0a63.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b3446cddfda454fb4f9b3fe2c3c0a63-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b3446cddfda454fb4f9b3fe2c3c0a63-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b3446cddfda454fb4f9b3fe2c3c0a63-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b3446cddfda454fb4f9b3fe2c3c0a63-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 S\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t ph\u00e1t \u0111i\u1ec3n h\u00ecnh thay v\u00ec c\u00f4ng su\u1ea5t ph\u00e1t t\u1ed1i thi\u1ec3u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t trong nh\u1eefng sai s\u00f3t t\u00ednh to\u00e1n nghi\u00eam tr\u1ecdng nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng c\u00e1c gi\u00e1 tr\u1ecb c\u00f4ng su\u1ea5t ph\u00e1t \u0111i\u1ec3n h\u00ecnh thay v\u00ec c\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o ghi trong b\u1ea3ng d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00ec sao \u0111\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t quang thay \u0111\u1ed5i theo dung sai s\u1ea3n xu\u1ea5t<\/p><\/li><li><p>\u201cC\u00e1c gi\u00e1 tr\u1ecb \u201d\u0111i\u1ec3n h\u00ecnh\u201d \u0111\u1ea1i di\u1ec7n cho hi\u1ec7u n\u0103ng trung b\u00ecnh, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec1u ki\u1ec7n x\u1ea5u nh\u1ea5t<\/p><\/li><li><p>C\u00e1c module th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng g\u1ea7n gi\u1edbi h\u1ea1n th\u00f4ng s\u1ed1 t\u1ed1i thi\u1ec3u<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Lu\u00f4n s\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t ph\u00e1t t\u1ed1i thi\u1ec3u (Tx) v\u00e0 \u0111\u1ed9 nh\u1ea1y nh\u1eadn t\u1ed1i thi\u1ec3u (Rx) \u0111\u1ec3 t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf v\u1eabn h\u1ee3p l\u1ec7 trong c\u00e1c t\u00ecnh hu\u1ed1ng x\u1ea5u nh\u1ea5t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 B\u1ecf qua t\u1ed5n hao \u0111\u1ea7u n\u1ed1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5n hao \u0111\u1ea7u n\u1ed1i th\u01b0\u1eddng b\u1ecb \u0111\u00e1nh gi\u00e1 th\u1ea5p ho\u1eb7c ho\u00e0n to\u00e0n b\u1ecb b\u1ecf qua trong c\u00e1c thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n h\u00f3a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Th\u1ef1c t\u1ebf \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed7i c\u1eb7p \u0111\u1ea7u n\u1ed1i: t\u1ed5n hao 0,2\u20130,5 dB<\/p><\/li><li><p>Nhi\u1ec1u \u0111i\u1ec3m n\u1ed1i d\u00e2y l\u00e0m t\u00edch l\u0169y t\u1ed5n hao \u0111\u00e1ng k\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sai l\u1ea7m ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ch\u1ec9 t\u00ednh to\u00e1n suy hao s\u1ee3i quang (d\u1ef1a tr\u00ean km)<\/p><\/li><li><p>B\u1ecf qua t\u1ee7 \u0111\u1ea5u n\u1ed1i v\u00e0 c\u00e1c \u0111i\u1ec3m giao ti\u1ebfp ch\u00e9o<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c \u0111\u1ed9ng: Ngay c\u1ea3 v\u00e0i \u0111\u1ea7u n\u1ed1i b\u1ecb b\u1ecf s\u00f3t c\u0169ng c\u00f3 th\u1ec3 ti\u00eau th\u1ee5 to\u00e0n b\u1ed9 bi\u00ean an to\u00e0n trong m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 \u0110\u00e1nh gi\u00e1 qu\u00e1 cao ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 s\u1ee3i quang \u0111\u1ec1u nh\u01b0 nhau, v\u00e0 \u0111i\u1ec1u ki\u1ec7n s\u1ee3i quang th\u1ef1c t\u1ebf th\u01b0\u1eddng kh\u00e1c bi\u1ec7t so v\u1edbi th\u00f4ng s\u1ed1 l\u00fd t\u01b0\u1edfng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang gi\u00e0 c\u1ed7i v\u1edbi suy hao t\u0103ng l\u00ean<\/p><\/li><li><p>Tr\u1ed9n l\u1eabn c\u00e1c lo\u1ea1i s\u1ee3i (OS2 + h\u1ec7 th\u1ed1ng c\u00e1p c\u0169)<\/p><\/li><li><p>Ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n n\u1ed1i k\u00e9m trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u0169<\/p><\/li><li><p>\u1ee8ng su\u1ea5t m\u00f4i tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng c\u00e1p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eadn \u0111\u1ecbnh then ch\u1ed1t: K\u1ef9 s\u01b0 th\u01b0\u1eddng gi\u1ea3 \u0111\u1ecbnh \u201cgi\u00e1 tr\u1ecb suy hao chu\u1ea9n\u201d, nh\u01b0ng c\u00e1c l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf th\u01b0\u1eddng v\u01b0\u1ee3t qu\u00e1 c\u00e1c gi\u00e1 tr\u1ecb n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn vi\u1ec7c \u01b0\u1edbc t\u00ednh t\u1ed5ng suy hao \u0111\u01b0\u1eddng truy\u1ec1n th\u1ea5p h\u01a1n th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 Nh\u1ea7m l\u1eabn gi\u1eefa kho\u1ea3ng c\u00e1ch v\u00e0 ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng sai l\u1ea7m kh\u00e1i ni\u1ec7m ph\u1ed5 bi\u1ebfn nh\u1ea5t khi tri\u1ec3n khai module SFP.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gi\u1ea3 \u0111\u1ecbnh sai l\u1ea7m:<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u201cN\u1ebfu module h\u1ed7 tr\u1ee3 10 km th\u00ec \u0111\u01b0\u1eddng truy\u1ec1n s\u1ebd ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong ph\u1ea1m vi 10 km.\u201d<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Th\u1ef1c t\u1ebf:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng s\u1ed1 kho\u1ea3ng c\u00e1ch KH\u00d4NG t\u00ednh \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>T\u1ed5n hao h\u00e0n n\u1ed1i<\/p><\/li><li><p>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng t\u1ee7 \u0111\u1ea5u n\u1ed1i<\/p><\/li><li><p>S\u1ef1 bi\u1ebfn thi\u00ean th\u1ef1c t\u1ebf c\u1ee7a suy hao s\u1ee3i quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 th\u1eadt k\u1ef9 thu\u1eadt: Ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n x\u00e1c \u0111\u1ecbnh kh\u1ea3 thi \u2014 th\u00f4ng s\u1ed1 kho\u1ea3ng c\u00e1ch ch\u1ec9 mang t\u00ednh tham kh\u1ea3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 Kh\u00f4ng bao g\u1ed3m bi\u00ean an to\u00e0n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c kh\u00f4ng bao g\u1ed3m bi\u00ean an to\u00e0n l\u00e0 nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y ra l\u1ed7i gi\u00e1n \u0111o\u1ea1n ho\u1eb7c l\u1ed7i trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Bi\u00ean \u0111\u1ec1 xu\u1ea5t:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed1i thi\u1ec3u 3\u20135 dB \u0111\u1ed1i v\u1edbi m\u1ea1ng doanh nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00ec sao \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i quang suy gi\u1ea3m theo th\u1eddi gian<\/p><\/li><li><p>C\u00e1c b\u1ed9 n\u1ed1i t\u00edch t\u1ee5 b\u1ee5i v\u00e0 b\u1ecb m\u00e0i m\u00f2n<\/p><\/li><li><p>C\u00e1c thay \u0111\u1ed5i m\u1ea1ng gi\u1edbi thi\u1ec7u th\u00eam c\u00e1c \u0111i\u1ec3m t\u1ed5n th\u1ea5t<\/p><\/li><li><p>Bi\u1ebfn thi\u00ean nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng quang h\u1ecdc<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>M\u1ed9t thi\u1ebft k\u1ebf kh\u00f4ng c\u00f3 d\u1ef1 ph\u00f2ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf \u1ed5n \u0111\u1ecbnh \u2014 m\u00e0 ch\u1ec9 l\u00e0 m\u1ed9t \u0111i\u1ec1u ki\u1ec7n t\u1ea1m th\u1eddi.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ef9 s\u01b0 m\u1ea1ng c\u00e1p quang chuy\u00ean nghi\u1ec7p lu\u00f4n tu\u00e2n theo ph\u01b0\u01a1ng ph\u00e1p thi\u1ebft k\u1ebf tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb Tx t\u1ed1i thi\u1ec3u \/ Rx tr\u01b0\u1eddng h\u1ee3p x\u1ea5u nh\u1ea5t<\/p><\/li><li><p>Bao g\u1ed3m to\u00e0n b\u1ed9 t\u1ed5n hao ch\u00e8n th\u1ef1c t\u1ebf<\/p><\/li><li><p>X\u00e1c th\u1ef1c d\u1ef1a tr\u00ean c\u00f4ng su\u1ea5t quang \u0111o \u0111\u01b0\u1ee3c (gi\u00e1 tr\u1ecb DOM)<\/p><\/li><li><p>Thi\u1ebft k\u1ebf v\u1edbi suy gi\u1ea3m trong t\u01b0\u01a1ng lai trong t\u00e2m tr\u00ed<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ea1ng v\u1eabn \u1ed5n \u0111\u1ecbnh kh\u00f4ng ch\u1ec9 t\u1ea1i th\u1eddi \u0111i\u1ec3m tri\u1ec3n khai, m\u00e0 c\u00f2n trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a n\u00f3.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Vi\u1ec7c s\u1eed d\u1ee5ng c\u00f4ng su\u1ea5t Tx \u0111i\u1ec3n h\u00ecnh thay v\u00ec gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u d\u1eabn \u0111\u1ebfn ng\u00e2n s\u00e1ch li\u00ean k\u1ebft kh\u00f4ng ch\u00ednh x\u00e1c<\/p><\/li><li><p>B\u1ecf qua t\u1ed5n hao b\u1ed9 n\u1ed1i c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 d\u1ef1 ph\u00f2ng quang h\u1ecdc<\/p><\/li><li><p>T\u1ed5n hao s\u1ee3i quang th\u1ef1c t\u1ebf th\u01b0\u1eddng v\u01b0\u1ee3t qu\u00e1 th\u00f4ng s\u1ed1 l\u00fd t\u01b0\u1edfng do l\u00e3o h\u00f3a ho\u1eb7c ch\u1ea5t l\u01b0\u1ee3ng l\u1eafp \u0111\u1eb7t<\/p><\/li><li><p>C\u00e1c x\u1ebfp h\u1ea1ng kho\u1ea3ng c\u00e1ch kh\u00f4ng n\u00ean thay th\u1ebf cho c\u00e1c ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft th\u1ef1c t\u1ebf<\/p><\/li><li><p>D\u1ef1 ph\u00f2ng an to\u00e0n (3\u20135 dB) l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n c\u1ee7a c\u00e1p quang<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udfe6\u00a0<\/strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 Ng\u00e2n s\u00e1ch Li\u00ean k\u1ebft Quang h\u1ecdc<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aca724a7cd9b4b6eba2406cc62079091.jpg\" alt=\"Optical Link Budget FAQ\" class=\"wp-image-2605\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aca724a7cd9b4b6eba2406cc62079091.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aca724a7cd9b4b6eba2406cc62079091-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aca724a7cd9b4b6eba2406cc62079091-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aca724a7cd9b4b6eba2406cc62079091-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/aca724a7cd9b4b6eba2406cc62079091-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang h\u1ecdc t\u1ed1t cho SFP l\u00e0 bao nhi\u00eau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cNg\u00e2n s\u00e1ch t\u1ed1t\u201d ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i SFP, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/products\/sfp-data-rate-1g-10g-25g-guide\/\">100G<\/a>, v\u00e0 \u1ee9ng d\u1ee5ng, nh\u01b0ng c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh l\u00e0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476763.htm\">SFP 1G<\/a> (LX): ~8\u201313 dB<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htmhttps:\/\/www.l-p.com\/products\/475767.htm\">SFP+ 10G<\/a> (LR): ~6\u201310 dB<\/p><\/li><li><p>C\u00e1c module t\u1ea7m xa (ER\/<a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476089.htm\">ZR<\/a>): 14 dB tr\u1edf l\u00ean<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean th\u1ef1c t\u1ebf, m\u1ed9t ng\u00e2n s\u00e1ch li\u00ean k\u1ebft t\u1ed1t l\u00e0 ng\u00e2n s\u00e1ch:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ee7 bao ph\u1ee7 to\u00e0n b\u1ed9 t\u1ed5n hao \u0111\u00e3 t\u00ednh to\u00e1n<\/p><\/li><li><p>Bao g\u1ed3m \u00edt nh\u1ea5t 3\u20135 dB d\u1ef1 ph\u00f2ng an to\u00e0n<\/p><\/li><li><p>Duy tr\u00ec c\u00f4ng su\u1ea5t Rx \u1ed5n \u0111\u1ecbnh \u1edf m\u1ee9c cao h\u01a1n ng\u01b0\u1ee1ng nh\u1ea1y c\u1ea3m<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ed9t SFP 10G c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c bao nhi\u00eau t\u1ed5n hao?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ea7u h\u1ebft <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477673.htm\">Module SFP+ 10G<\/a> (lo\u1ea1i LR) h\u1ed7 tr\u1ee3 kho\u1ea3ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>6\u201310 dB t\u1ed5n hao quang h\u1ecdc t\u1ed5ng c\u1ed9ng<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a module:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t Tx th\u1ea5p h\u01a1n \u2192 t\u1ed5n hao cho ph\u00e9p th\u1ea5p h\u01a1n<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y Rx t\u1ed1t h\u01a1n \u2192 t\u1ed5n hao cho ph\u00e9p cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n t\u00ednh to\u00e1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft = Tx(min) \u2212 \u0110\u1ed9 nh\u1ea1y Rx<\/strong><\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >Lo\u1ea1i b\u1ed9 n\u1ed1i c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ng\u00e2n s\u00e1ch li\u00ean k\u1ebft kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3, lo\u1ea1i v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 n\u1ed1i \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c t\u00e1c \u0111\u1ed9ng \u0111i\u1ec3n h\u00ecnh:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 n\u1ed1i LC\/SC ti\u00eau chu\u1ea9n: t\u1ed5n hao 0,2\u20130,5 dB m\u1ed7i c\u1eb7p<\/p><\/li><li><p>B\u1ed9 n\u1ed1i k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng ho\u1eb7c b\u1ea9n: c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 1 dB t\u1ed5n hao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c y\u1ebfu t\u1ed1 then ch\u1ed1t:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u0103n ch\u1ec9nh<\/p><\/li><li><p>\u0110\u1ed9 s\u1ea1ch b\u1ec1 m\u1eb7t<\/p><\/li><li><p>M\u1ee9c \u0111\u1ed9 m\u00e0i m\u00f2n b\u1ed9 n\u1ed1i theo th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u0111\u1ea7u n\u1ed1i ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m s\u1ea1ch \u0111\u00fang c\u00e1ch l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec bi\u00ean d\u1ef1 ph\u00f2ng li\u00ean k\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ea1i sao m\u00f4-\u0111un SFP c\u1ee7a t\u00f4i ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u01b0ng l\u1ea1i th\u1ea5t b\u1ea1i \u1edf kho\u1ea3ng c\u00e1ch xa?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 kinh \u0111i\u1ec3n v\u1ec1 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u1ede kho\u1ea3ng c\u00e1ch ng\u1eafn:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 suy hao s\u1ee3i quang l\u00e0 t\u1ed1i thi\u1ec3u<\/p><\/li><li><p>T\u1ed5ng t\u1ed5n hao n\u1eb1m trong gi\u1edbi h\u1ea1n ng\u00e2n s\u00e1ch<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u1ede kho\u1ea3ng c\u00e1ch xa:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao s\u1ee3i quang t\u0103ng l\u00ean (kho\u1ea3ng c\u00e1ch \u00d7 \u0111\u1ed9 suy hao)<\/p><\/li><li><p>C\u00e1c \u0111\u1ea7u n\u1ed1i\/b\u1ed9 n\u1ed1i th\u00eam t\u00edch l\u0169y t\u1ed5n hao<\/p><\/li><li><p>T\u00edn hi\u1ec7u c\u00f3 th\u1ec3 gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi ng\u01b0\u1ee1ng nh\u1ea1y c\u1ea3m c\u1ee7a b\u1ed9 thu<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft qu\u1ea3:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng \u1edf kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u01b0ng th\u1ea5t b\u1ea1i khi t\u1ed5ng t\u1ed5n hao v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch quang h\u1ecdc<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n trong thi\u1ebft k\u1ebf s\u1ee3i quang l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>\u0111\u1ec7m an to\u00e0n<\/strong> l\u00e0 m\u1ed9t kho\u1ea3ng \u0111\u1ec7m b\u1ed5 sung (th\u01b0\u1eddng l\u00e0 <strong>3\u20135 dB<\/strong>) \u0111\u01b0\u1ee3c th\u00eam v\u00e0o ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M\u1ee5c \u0111\u00edch:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u00f9 \u0111\u1eafp cho s\u1ef1 l\u00e3o h\u00f3a c\u1ee7a s\u1ee3i quang<\/p><\/li><li><p>X\u1eed l\u00fd t\u00ecnh tr\u1ea1ng nhi\u1ec5m b\u1ea9n \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>Cho ph\u00e9p thay \u0111\u1ed5i m\u1ea1ng trong t\u01b0\u01a1ng lai<\/p><\/li><li><p>H\u1ea5p th\u1ee5 c\u00e1c bi\u1ebfn \u0111\u1ed5i m\u00f4i tr\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc k\u1ef9 thu\u1eadt: M\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang h\u1ee3p l\u1ec7 ph\u1ea3i th\u1ecfa m\u00e3n:<br\/><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u2265 T\u1ed5ng t\u1ed5n hao + \u0110\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udfe6 K\u1ebft lu\u1eadn \u2013 V\u00ec sao Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang quan tr\u1ecdng trong thi\u1ebft k\u1ebf SFP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t b\u00e0i t\u1eadp l\u00fd thuy\u1ebft \u2014 m\u00e0 l\u00e0 nguy\u00ean l\u00fd k\u1ef9 thu\u1eadt c\u1ed1t l\u00f5i x\u00e1c \u0111\u1ecbnh li\u1ec7u li\u00ean k\u1ebft s\u1ee3i quang SFP c\u00f3 th\u1ef1c s\u1ef1 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf hay kh\u00f4ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b213222763846279979b9c5fd6253c5.jpg\" alt=\"Why Optical Link Budget Matters in SFP Design\" class=\"wp-image-2606\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b213222763846279979b9c5fd6253c5.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b213222763846279979b9c5fd6253c5-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b213222763846279979b9c5fd6253c5-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b213222763846279979b9c5fd6253c5-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b213222763846279979b9c5fd6253c5-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00f3m t\u1eaft Logic t\u00ednh to\u00e1n ch\u00ednh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang \u0111\u00e1ng tin c\u1eady \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean m\u1ed9t quy t\u1eafc \u0111\u01a1n gi\u1ea3n nh\u01b0ng nghi\u00eam ng\u1eb7t:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft = C\u00f4ng su\u1ea5t ph\u00e1t t\u1ed1i thi\u1ec3u (Tx min) \u2212 Ng\u01b0\u1ee1ng nh\u1ea1y c\u1ea3m c\u1ee7a b\u1ed9 thu t\u1ed1i thi\u1ec3u (Rx Sensitivity min)<\/strong><br\/><strong>\u0110i\u1ec1u ki\u1ec7n li\u00ean k\u1ebft h\u1ee3p l\u1ec7: Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u2265 T\u1ed5ng t\u1ed5n hao + \u0110\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Trong \u0111\u00f3 t\u1ed5ng t\u1ed5n hao bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao do suy hao s\u1ee3i (ph\u1ee5 thu\u1ed9c kho\u1ea3ng c\u00e1ch)<\/p><\/li><li><p>Suy hao t\u1ea1i \u0111i\u1ec3m n\u1ed1i v\u00e0 m\u1ed1i h\u00e0n<\/p><\/li><li><p>C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng v\u00e0 l\u00e3o h\u00f3a (th\u00f4ng qua \u0111\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p t\u00ednh n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00f4ng su\u1ea5t quang \u0111\u1ee7 l\u1edbn s\u1ebd \u0111\u1ebfn \u0111\u01b0\u1ee3c b\u1ed9 thu trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n x\u1ea5u nh\u1ea5t, ch\u1ee9 kh\u00f4ng ch\u1ec9 trong c\u00e1c k\u1ecbch b\u1ea3n l\u00fd t\u01b0\u1edfng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 tin c\u1eady th\u1ef1c t\u1ebf c\u1ee7a m\u1ea1ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong tri\u1ec3n khai th\u1ef1c t\u1ebf, ph\u1ea7n l\u1edbn s\u1ef1 c\u1ed1 li\u00ean k\u1ebft s\u1ee3i quang kh\u00f4ng b\u1eaft ngu\u1ed3n t\u1eeb ph\u1ea7n c\u1ee9ng kh\u00f4ng t\u01b0\u01a1ng th\u00edch \u2014 m\u00e0 do \u0111\u1ed9 d\u1ef1 ph\u00f2ng quang kh\u00f4ng \u0111\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t ng\u00e2n s\u00e1ch li\u00ean k\u1ebft \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n \u0111\u00fang c\u00e1ch:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng gi\u00e1n \u0111o\u1ea1n li\u00ean k\u1ebft t\u1eebng l\u00fac <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-does-packet-loss-mean-for-your-internet-connection\/\">m\u1ea5t g\u00f3i<\/a><\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>Cung c\u1ea5p kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i tr\u01b0\u1edbc l\u00e3o h\u00f3a, nhi\u1ec5m b\u1ea9n v\u00e0 bi\u1ebfn \u0111\u1ed5i m\u00f4i tr\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 Ng\u01b0\u1ee3c l\u1ea1i, vi\u1ec7c ch\u1ec9 d\u1ef1a v\u00e0o \u201c\u0111\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch\u201d ho\u1eb7c th\u00f4ng s\u1ed1 \u0111i\u1ec3n h\u00ecnh th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn h\u00e0nh vi m\u1ea1ng kh\u00f3 d\u1ef1 \u0111o\u00e1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Khung ra quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt cho vi\u1ec7c tri\u1ec3n khai SFP<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 thi\u1ebft k\u1ebf m\u1ed9t m\u1ea1ng s\u1ee3i quang \u1ed5n \u0111\u1ecbnh v\u00e0 m\u1edf r\u1ed9ng \u0111\u01b0\u1ee3c, k\u1ef9 s\u01b0 c\u1ea7n \u0111\u00e1nh gi\u00e1 b\u1ed1n y\u1ebfu t\u1ed1 then ch\u1ed1t:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2460 Kho\u1ea3ng c\u00e1ch<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh t\u1ed5ng chi\u1ec1u d\u00e0i s\u1ee3i quang<\/p><\/li><li><p>Chuy\u1ec3n \u0111\u1ed5i kho\u1ea3ng c\u00e1ch th\u00e0nh t\u1ed5n hao suy hao (dB\/km)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2461 Lo\u1ea1i s\u1ee3i quang<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng <strong>S\u1ee3i \u0111\u01a1n mode (SMF, OS2)<\/strong> d\u00e0nh cho c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa<\/p><\/li><li><p>S\u1eed d\u1ee5ng <strong>MMF (OM3\/OM4)<\/strong> ch\u1ec9 d\u00e0nh cho c\u00e1c \u1ee9ng d\u1ee5ng kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2462 T\u1ed5n hao th\u00e0nh ph\u1ea7n<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ebfm t\u1ea5t c\u1ea3 \u0111\u1ea7u n\u1ed1i, b\u1ea3ng \u0111\u1ea5u n\u1ed1i (patch panel) v\u00e0 m\u1ed1i n\u1ed1i (splice)<\/p><\/li><li><p>\u01af\u1edbc t\u00ednh t\u1ed5n hao ch\u00e8n th\u1ef1c t\u1ebf cho t\u1eebng th\u00e0nh ph\u1ea7n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2463 Chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ed9 d\u1ef1 ph\u00f2ng<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lu\u00f4n bao g\u1ed3m \u0111\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n t\u1eeb 3\u20135 dB<\/p><\/li><li><p>L\u1eadp k\u1ebf ho\u1ea1ch cho suy gi\u1ea3m v\u00e0 m\u1edf r\u1ed9ng m\u1ea1ng trong t\u01b0\u01a1ng lai<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Khuy\u1ebfn ngh\u1ecb cu\u1ed1i c\u00f9ng cho vi\u1ec7c tri\u1ec3n khai \u1ed5n \u0111\u1ecbnh<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 thi\u1ebft k\u1ebf m\u1ea1ng SFP \u0111\u00e1ng tin c\u1eady:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Lu\u00f4n t\u00ednh to\u00e1n b\u1eb1ng c\u00e1c gi\u00e1 tr\u1ecb Tx v\u00e0 Rx trong \u0111i\u1ec1u ki\u1ec7n x\u1ea5u nh\u1ea5t<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft lu\u00f4n th\u1ea5p h\u01a1n ng\u00e2n s\u00e1ch quang h\u1ecdc<\/p><\/li><li><p>Duy tr\u00ec \u0111\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n t\u1ed1i thi\u1ec3u t\u1eeb 3\u20135 dB<\/p><\/li><li><p>Ki\u1ec3m ch\u1ee9ng hi\u1ec7u n\u0103ng th\u1ef1c t\u1ebf b\u1eb1ng DOM (gi\u00e1 tr\u1ecb \u0111o c\u00f4ng su\u1ea5t quang)<\/p><\/li><li><p>Tr\u00e1nh ph\u1ee5 thu\u1ed9c qu\u00e1 m\u1ee9c v\u00e0o nh\u00e3n kho\u1ea3ng c\u00e1ch ho\u1eb7c c\u00e1c gi\u1ea3 \u0111\u1ecbnh l\u00fd thuy\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>M\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang ch\u1ec9 \u0111\u00e1ng tin c\u1eady b\u1eb1ng \u0111\u1ed9 d\u1ef1 ph\u00f2ng quang c\u1ee7a n\u00f3 \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1eb1ng kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c.<\/strong><\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c tri\u1ec3n khai SFP v\u1edbi c\u00e1c module quang \u0111\u00e1ng tin c\u1eady<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 chuy\u1ec3n \u0111\u1ed5i (transceiver) ph\u00f9 h\u1ee3p quan tr\u1ecdng ngang b\u1eb1ng v\u1edbi vi\u1ec7c t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft. \u0110\u1ec3 \u0111\u1ea1t hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-test-sfp-compatibility\/\">t\u01b0\u01a1ng th\u00edch<\/a>, v\u00e0 \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng c\u00e1c module SFP ch\u1ea5t l\u01b0\u1ee3ng cao, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 Kh\u00e1m ph\u00e1 c\u00e1c module quang \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra t\u01b0\u01a1ng th\u00edch SFP t\u1ea1i <a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ea1ng c\u1ee7a b\u1ea1n \u0111\u00e1p \u1ee9ng c\u1ea3 y\u00eau c\u1ea7u hi\u1ec7u n\u0103ng l\u1eabn \u0111\u1ed9 tin c\u1eady.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang x\u00e1c \u0111\u1ecbnh li\u1ec7u m\u1ed9t li\u00ean k\u1ebft s\u1ee3i quang SFP c\u00f3 kh\u1ea3 thi v\u00e0 \u1ed5n \u0111\u1ecbnh hay kh\u00f4ng<\/p><\/li><li><p>Thi\u1ebft k\u1ebf \u0111\u00e1ng tin c\u1eady \u0111\u00f2i h\u1ecfi ph\u00e9p t\u00ednh Tx \u2212 Rx k\u00e8m theo t\u1ed5ng t\u1ed5n hao v\u00e0 \u0111\u1ed9 d\u1ef1 ph\u00f2ng an to\u00e0n<\/p><\/li><li><p>C\u00e1c y\u1ebfu t\u1ed1 then ch\u1ed1t bao g\u1ed3m kho\u1ea3ng c\u00e1ch, lo\u1ea1i s\u1ee3i quang, t\u1ed5n hao \u0111\u1ea7u n\u1ed1i v\u00e0 chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ed9 d\u1ef1 ph\u00f2ng<\/p><\/li><li><p>M\u1ea1ng \u1ed5n \u0111\u1ecbnh ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u1ef1 ph\u00f2ng quang, ch\u1ee9 kh\u00f4ng ph\u1ea3i v\u00e0o \u0111\u1ecbnh m\u1ee9c kho\u1ea3ng c\u00e1ch<\/p><\/li><li><p>C\u00e1c module SFP ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 thi\u1ebft k\u1ebf \u0111\u00fang c\u00e1ch \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng d\u00e0i h\u1ea1n<\/p><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>H\u1ecdc c\u00e1ch t\u00ednh to\u00e1n li\u00ean k\u1ebft quang cho module SFP v\u1edbi c\u00f4ng th\u1ee9c, v\u00ed d\u1ee5 th\u1ef1c t\u1ebf, ph\u00e2n t\u00edch m\u1ea5t m\u00e1t quang v\u00e0 c\u00e1c m\u1eb9o kh\u1eafc ph\u1ee5c cho li\u00ean k\u1ebft \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"author":1,"featured_media":2608,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-2610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=2610"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2610\/revisions"}],"predecessor-version":[{"id":10715,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2610\/revisions\/10715"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2608"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}