{"id":3253,"date":"2026-02-28T00:00:00","date_gmt":"2026-02-28T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/products\/long-distance-transceiver-types-reach-selection-guide\/"},"modified":"2026-06-22T04:08:50","modified_gmt":"2026-06-22T04:08:50","slug":"long-distance-transceiver-types-reach-selection-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/products\/long-distance-transceiver-types-reach-selection-guide","title":{"rendered":"B\u1ed9 thu ph\u00e1t Kho\u1ea3ng c\u00e1ch Xa: C\u00e1c lo\u1ea1i, T\u1ea7m xa v\u00e0 H\u01b0\u1edbng d\u1eabn L\u1ef1a ch\u1ecdn"},"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\/46389fb87adb459485954455c56defcc.jpg\" alt=\"Long Distance Transceiver: Types, Reach and Selection Guide\" class=\"wp-image-3240\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/46389fb87adb459485954455c56defcc.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/46389fb87adb459485954455c56defcc-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/46389fb87adb459485954455c56defcc-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/46389fb87adb459485954455c56defcc-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/46389fb87adb459485954455c56defcc-18x9.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478340.htm\"><strong>B\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa<\/strong><\/a> l\u00e0 m\u1ed9t m\u00f4-\u0111un quang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 truy\u1ec1n l\u01b0u l\u01b0\u1ee3ng Ethernet ho\u1eb7c trung t\u00e2m d\u1eef li\u1ec7u qua c\u00e1c \u0111\u01b0\u1eddng d\u00e2y s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (SMF) k\u00e9o d\u00e0i, th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb 10 km \u0111\u1ebfn 120 km m\u00e0 kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i trung gian. Kh\u00e1c v\u1edbi c\u00e1c b\u1ed9 thu ph\u00e1t t\u1ea7m ng\u1eafn ho\u1ea1t \u0111\u1ed9ng tr\u00ean s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 \u1edf b\u01b0\u1edbc s\u00f3ng 850 nm, c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng c\u00e1c b\u01b0\u1edbc s\u00f3ng 1310 nm ho\u1eb7c 1550 nm nh\u1eb1m gi\u1ea3m thi\u1ec3u suy hao v\u00e0 h\u1ed7 tr\u1ee3 vi\u1ec7c lan truy\u1ec1n t\u00edn hi\u1ec7u \u1ed5n \u0111\u1ecbnh tr\u00ean c\u00e1c m\u1ea1ng \u0111\u00f4 th\u1ecb, li\u00ean khu\u00f4n vi\u00ean v\u00e0 m\u1ea1ng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c h\u1ec7 th\u1ed1ng quang hi\u1ec7n \u0111\u1ea1i, kh\u1ea3 n\u0103ng \u0111\u1ea1t kho\u1ea3ng c\u00e1ch kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi b\u01b0\u1edbc s\u00f3ng. T\u1ea7m ho\u1ea1t \u0111\u1ed9ng ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa c\u00f4ng su\u1ea5t quang ph\u00e1t \u0111i (Tx), \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu (Rx), t\u1ed5ng suy hao \u0111\u01b0\u1eddng truy\u1ec1n (dB\/km \u00d7 kho\u1ea3ng c\u00e1ch), t\u1ed5n hao t\u1ea1i \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i, c\u0169ng nh\u01b0 \u0111\u1ed9 t\u00e1n s\u1eafc chromatic. V\u00ed d\u1ee5, s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n ti\u00eau chu\u1ea9n (ITU-T G.652.D) c\u00f3 suy hao \u0111i\u1ec3n h\u00ecnh kho\u1ea3ng 0,35 dB\/km \u1edf b\u01b0\u1edbc s\u00f3ng 1310 nm v\u00e0 kho\u1ea3ng 0,20\u20130,25 dB\/km \u1edf b\u01b0\u1edbc s\u00f3ng 1550 nm. C\u1eeda s\u1ed5 suy hao th\u1ea5p h\u01a1n n\u00e0y l\u00e0 m\u1ed9t trong nh\u1eefng l\u00fd do khi\u1ebfn c\u00e1c b\u1ed9 thu ph\u00e1t 1550 nm chi\u1ebfm \u01b0u th\u1ebf tr\u00ean c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n v\u01b0\u1ee3t qu\u00e1 40 km, \u0111\u1eb7c bi\u1ec7t khi k\u1ebft h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 khu\u1ebfch \u0111\u1ea1i quang nh\u01b0 b\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha erbium (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/erbium-doped-fiber-amplifier-optical-networks\/\">B\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i quang pha t\u1ea1p erbium (EDFAs)<\/a>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111\u1ecbnh ngh\u0129a c\u00e1c b\u1ed9 thu ph\u00e1t Ethernet t\u1ea7m xa theo c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 IEEE 802.3ae (10GBASE-ER \u1edf 40 km) v\u00e0 IEEE 802.3ba (bao g\u1ed3m c\u00e1c bi\u1ebfn th\u1ec3 t\u1ea7m xa m\u1edf r\u1ed9ng). C\u00e1c ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh r\u00f5 ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t, c\u1eeda s\u1ed5 b\u01b0\u1edbc s\u00f3ng v\u00e0 gi\u1edbi h\u1ea1n t\u00e1n s\u1eafc nh\u1eb1m \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb tu\u00e2n th\u1ee7.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb g\u00f3c \u0111\u1ed9 k\u1ef9 thu\u1eadt, c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo l\u1edbp t\u1ea7m ho\u1ea1t \u0111\u1ed9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476764.htm\"><strong>LR<\/strong><\/a><strong> (T\u1ea7m xa)<\/strong> \u2014 th\u01b0\u1eddng l\u00ean t\u1edbi 10 km<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476862.htm\"><strong>ER<\/strong><\/a><strong> M\u1ea1ng doanh nghi\u1ec7p v\u00e0 \u0111\u00f4 th\u1ecb kho\u1ea3ng c\u00e1ch xa, \u1ee9ng d\u1ee5ng c\u1ea5p nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5<\/strong> \u2014 th\u01b0\u1eddng l\u00ean t\u1edbi 40 km<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476865.htm\"><strong>ZR<\/strong><\/a> \u2014 th\u01b0\u1eddng l\u00ean t\u1edbi 80 km ho\u1eb7c xa h\u01a1n (th\u01b0\u1eddng mang t\u00ednh \u0111\u1eb7c th\u00f9 theo nh\u00e0 cung c\u1ea5p ho\u1eb7c d\u1ef1a tr\u00ean DWDM)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed7i l\u1edbp t\u01b0\u01a1ng \u1ee9ng v\u1edbi ng\u00e2n s\u00e1ch quang h\u1ecdc v\u00e0 dung sai t\u00e1n s\u1eafc c\u1ee5 th\u1ec3. Khi kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n t\u0103ng l\u00ean, t\u00e1n s\u1eafc chromatic v\u00e0 suy hao t\u00edch l\u0169y tr\u1edf th\u00e0nh c\u00e1c y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n ch\u1ee7 \u0111\u1ea1o, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 c\u00f4ng su\u1ea5t ph\u00e1t ra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1ch th\u1ee9c l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng (1310 nm so v\u1edbi 1550 nm), c\u00e1ch t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch quang h\u1ecdc, \u0111\u1eb7c t\u00ednh t\u00e1n s\u1eafc v\u00e0 ki\u1ebfn tr\u00fac m\u1ea1ng t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 l\u1ef1a ch\u1ecdn m\u00f4-\u0111un ph\u00f9 h\u1ee3p. Vi\u1ec7c ch\u1ecdn sai l\u1edbp t\u1ea7m ho\u1ea1t \u0111\u1ed9ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn bi\u00ean d\u1ef1 ph\u00f2ng kh\u00f4ng \u0111\u1ee7, qu\u00e1 t\u1ea3i b\u1ed9 thu ho\u1eb7c chi ph\u00ed t\u0103ng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p gi\u1ea3i th\u00edch ch\u00ednh x\u00e1c v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa, bao g\u1ed3m ph\u00e2n lo\u1ea1i t\u1ea7m ho\u1ea1t \u0111\u1ed9ng, c\u00e2n nh\u1eafc v\u1ec1 b\u01b0\u1edbc s\u00f3ng, c\u00e1ch t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n quang, \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u00e1n s\u1eafc, t\u00edch h\u1ee3p DWDM v\u00e0 c\u00e1c th\u1ef1c ti\u1ec5n tri\u1ec3n khai t\u1ed1t nh\u1ea5t. M\u1ee5c ti\u00eau l\u00e0 trang b\u1ecb cho k\u1ef9 s\u01b0 m\u1ea1ng v\u00e0 nh\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u00e1c ti\u00eau ch\u00ed c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh \u0111\u00e1ng tin c\u1eady v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n s\u1ee3i quang \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f B\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa l\u00e0 g\u00ec?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>B\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa<\/strong> is a <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476763.htm\">pluggable optical module<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao qua s\u1ee3i quang ch\u1ebf \u0111\u1ed9 \u0111\u01a1n (SMF) tr\u00ean kho\u1ea3ng c\u00e1ch k\u00e9o d\u00e0i, th\u01b0\u1eddng t\u1eeb 10 km \u0111\u1ebfn 120 km m\u00e0 kh\u00f4ng c\u1ea7n t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u. N\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c laser c\u00f3 \u0111\u1ed9 r\u1ed9ng v\u1ea1ch h\u1eb9p \u1edf b\u01b0\u1edbc s\u00f3ng 1310 nm ho\u1eb7c 1550 nm c\u00f9ng c\u00f4ng su\u1ea5t quang ph\u00e1t cao h\u01a1n v\u00e0 c\u00e1c b\u1ed9 thu c\u00f3 \u0111\u1ed9 nh\u1ea1y cao nh\u1eb1m duy tr\u00ec bi\u00ean d\u1ef1 ph\u00f2ng \u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ee7 l\u1edbn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong ph\u00e2n lo\u1ea1i Ethernet, c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u00f3m theo t\u1ea7m ho\u1ea1t \u0111\u1ed9ng: <strong>10 km (LR)<\/strong>, <strong>40 km (ER)<\/strong>, <strong>80 km (ZR)<\/strong>, v\u00e0 trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p <strong>100\u2013120 km<\/strong> d\u00e0nh cho c\u00e1c bi\u1ebfn th\u1ec3 n\u00e2ng cao ho\u1eb7c d\u1ef1a tr\u00ean DWDM. M\u1ed7i l\u1edbp t\u1ea7m ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang h\u1ecdc v\u00e0 dung sai t\u00e1n s\u1eafc \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 c\u00f4ng su\u1ea5t ph\u00e1t cao h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa ph\u1ee5 thu\u1ed9c v\u00e0o <strong>v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong> v\u00ec l\u00f5i nh\u1ecf c\u1ee7a n\u00f3 (th\u01b0\u1eddng 8\u201310 \u00b5m) lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9, cho ph\u00e9p truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh tr\u00ean h\u00e0ng ch\u1ee5c kil\u00f4m\u00e9t. S\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 (MMF) kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c kho\u1ea3ng c\u00e1ch n\u00e0y do gi\u1edbi h\u1ea1n b\u1edfi hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 v\u00e0 suy hao cao h\u01a1n \u0111\u00e1ng k\u1ec3 ngo\u00e0i c\u1eeda s\u1ed5 850 nm.<\/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\/6ea998a81c8e490a934c62cd999056a6.jpg\" alt=\"What Is a Long Distance Transceiver?\" class=\"wp-image-3241\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6ea998a81c8e490a934c62cd999056a6.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6ea998a81c8e490a934c62cd999056a6-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6ea998a81c8e490a934c62cd999056a6-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6ea998a81c8e490a934c62cd999056a6-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6ea998a81c8e490a934c62cd999056a6-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa trong m\u1ea1ng quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong ki\u1ebfn tr\u00fac m\u1ea1ng quang, m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476874.htm\">b\u1ed9 thu ph\u00e1t SFP kho\u1ea3ng c\u00e1ch xa<\/a> ho\u1ea1t \u0111\u1ed9ng nh\u01b0 giao di\u1ec7n t\u1ea7ng v\u1eadt l\u00fd cho ph\u00e9p l\u01b0u l\u01b0\u1ee3ng t\u1ea7ng 2 v\u00e0 t\u1ea7ng 3 v\u01b0\u1ee3t qua c\u00e1c \u0111o\u1ea1n c\u00e1p s\u1ee3i quang k\u00e9o d\u00e0i m\u00e0 kh\u00f4ng c\u1ea7n t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u. N\u00f3 k\u1ebft n\u1ed1i c\u00e1c switch, router v\u00e0 thi\u1ebft b\u1ecb v\u1eadn chuy\u1ec3n xuy\u00ean su\u1ed1t c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng \u0111\u00f4 th\u1ecb, li\u00ean khu\u00f4n vi\u00ean v\u00e0 x\u01b0\u01a1ng s\u1ed1ng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5\u2014n\u01a1i kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n c\u1ee7a c\u00e1c b\u1ed9 thu ph\u00e1t t\u1ea7m ng\u1eafn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong thi\u1ebft k\u1ebf m\u1ea1ng ph\u00e2n c\u1ea5p, c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa th\u01b0\u1eddng \u0111\u1ea3m nhi\u1ec7m ba vai tr\u00f2 then ch\u1ed1t:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>T\u1eadp h\u1ee3p gi\u1eefa c\u00e1c t\u00f2a nh\u00e0 v\u00e0 trong khu\u00f4n vi\u00ean<\/strong><br\/>K\u1ebft n\u1ed1i c\u00e1c switch l\u00f5i gi\u1eefa c\u00e1c c\u01a1 s\u1edf c\u00e1ch xa nhau v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd (ph\u1ea1m vi 10\u201340 km).<\/p><\/li><li><p><strong>C\u00e1c li\u00ean k\u1ebft x\u01b0\u01a1ng s\u1ed1ng \u0111\u00f4 th\u1ecb v\u00e0 v\u00f9ng<\/strong><br\/>H\u1ed7 tr\u1ee3 c\u00e1c t\u1ea7ng t\u1eadp h\u1ee3p v\u00e0 ph\u00e2n ph\u1ed1i trong m\u1ea1ng nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 ho\u1eb7c doanh nghi\u1ec7p l\u1edbn (ph\u1ea1m vi 40\u201380 km).<\/p><\/li><li><p><strong>T\u00edch h\u1ee3p v\u1eadn chuy\u1ec3n \u0111\u01b0\u1eddng d\u00e0i v\u00e0 DWDM<\/strong><br\/>Ho\u1ea1t \u0111\u1ed9ng trong c\u00e1c h\u1ec7 th\u1ed1ng gh\u00e9p k\u00eanh ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng (WDM), n\u01a1i nhi\u1ec1u k\u00eanh chia s\u1ebb m\u1ed9t c\u1eb7p s\u1ee3i quang duy nh\u1ea5t (80 km tr\u1edf l\u00ean).<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478010.htm\">B\u1ed9 thu ph\u00e1t SFP<\/a> x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi ng\u00e2n s\u00e1ch quang h\u1ecdc c\u1ee7a m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n\u2014c\u00f4ng su\u1ea5t ph\u00e1t, \u0111\u1ed9 nh\u1ea1y b\u1ed9 thu v\u00e0 b\u01b0\u1edbc s\u00f3ng c\u1ee7a n\u00f3 quy\u1ebft \u0111\u1ecbnh xem \u0111o\u1ea1n \u0111\u01b0\u1eddng v\u1eadt l\u00fd c\u00f3 th\u1ec3 duy tr\u00ec vi\u1ec7c truy\u1ec1n d\u1eabn kh\u00f4ng l\u1ed7i \u1edf t\u1ed1c \u0111\u1ed9 bit \u0111\u00e3 n\u00eau hay kh\u00f4ng. Theo ngh\u0129a n\u00e0y, n\u00f3 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t m\u00f4-\u0111un c\u1eafm r\u1eddi m\u00e0 c\u00f2n l\u00e0 ranh gi\u1edbi hi\u1ec7u n\u0103ng chi ph\u1ed1i t\u1ea7m ho\u1ea1t \u0111\u1ed9ng, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c trong to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec c\u00e1c ti\u00eau chu\u1ea9n Ethernet hi\u1ec7n \u0111\u1ea1i quy chu\u1ea9n h\u00f3a c\u00e1c danh m\u1ee5c kho\u1ea3ng c\u00e1ch (LR, ER, ZR), n\u00ean c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch \u0111a nh\u00e0 cung c\u1ea5p khi \u0111\u01b0\u1ee3c tri\u1ec3n khai theo c\u00e1c th\u00f4ng s\u1ed1 c\u00f4ng su\u1ea5t v\u00e0 b\u01b0\u1edbc s\u00f3ng \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a. Vai tr\u00f2 c\u1ee7a ch\u00fang do \u0111\u00f3 v\u1eeba l\u00e0<br> <strong>ch\u1ee9c n\u0103ng (truy\u1ec1n t\u00edn hi\u1ec7u)<br><\/strong> and <strong>ki\u1ebfn tr\u00fac (m\u1edf r\u1ed9ng v\u00e0 m\u1edf r\u1ed9ng quy m\u00f4 m\u1ea1ng)<br><\/strong> trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quang h\u1ecdc.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f C\u1eeda s\u1ed5 truy\u1ec1n d\u1eabn c\u1ee7a b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa: 1310 nm so v\u1edbi 1550 nm<br><\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477868.htm\"><strong>1310 nm<\/strong><\/a> and <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478022.htm\"><strong>1550 nm<\/strong><\/a> l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh n\u1ec1n t\u1ea3ng trong thi\u1ebft k\u1ebf b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa. M\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF), nh\u01b0ng \u0111\u1eb7c t\u00ednh suy hao, h\u00e0nh vi t\u00e1n s\u1eafc v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch khu\u1ebfch \u0111\u1ea1i c\u1ee7a ch\u00fang kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3.<br>.<\/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\/8b91a27fe2ef4df7974778f5cb1a9f9c.jpg\" alt=\"Long Distance Transceiver Transmission Windows: 1310nm vs. 1550nm\" class=\"wp-image-3242\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8b91a27fe2ef4df7974778f5cb1a9f9c.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8b91a27fe2ef4df7974778f5cb1a9f9c-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8b91a27fe2ef4df7974778f5cb1a9f9c-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8b91a27fe2ef4df7974778f5cb1a9f9c-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/8b91a27fe2ef4df7974778f5cb1a9f9c-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 So s\u00e1nh suy hao<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suy hao s\u1ee3i quang tr\u1ef1c ti\u1ebfp x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u00e0 ng\u00e2n s\u00e1ch quang c\u1ea7n thi\u1ebft.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi s\u1ee3i quang \u0111\u01a1n mode ti\u00eau chu\u1ea9n (ITU-T G.652.D), c\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh l\u00e0:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>1310 nm:<\/strong> ~0,32\u20130,35 dB\/km<br><\/p><\/li><li><p><strong>1550 nm:<br><\/strong> ~0,20\u20130,25 dB\/km<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ec suy hao t\u1ea1i 1550 nm th\u1ea5p h\u01a1n kho\u1ea3ng 30\u201340% so v\u1edbi t\u1ea1i 1310 nm, t\u1ed5n th\u1ea5t to\u00e0n b\u1ed9 \u0111o\u1ea1n c\u00e1p t\u0103ng ch\u1eadm h\u01a1n theo kho\u1ea3ng c\u00e1ch. V\u00ed d\u1ee5:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>40 km t\u1ea1i 1310 nm \u2192 suy hao s\u1ee3i quang ~13\u201314 dB<br><\/p><\/li><li><p>40 km t\u1ea1i 1550 nm \u2192 suy hao s\u1ee3i quang ~8\u201310 dB<br><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y tr\u1edf n\u00ean ng\u00e0y c\u00e0ng quan tr\u1ecdng h\u01a1n khi v\u01b0\u1ee3t qu\u00e1 40 km, n\u01a1i bi\u00ean d\u1ef1 ph\u00f2ng quang tr\u1edf n\u00ean h\u1ea1n ch\u1ebf h\u01a1n.<br>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 T\u00e1c \u0111\u1ed9ng c\u1ee7a t\u00e1n s\u1eafc chromatic<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1n s\u1eafc chromatic c\u00f3 h\u00e0nh vi kh\u00e1c nhau trong t\u1eebng c\u1eeda s\u1ed5:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ea1i <strong>1310 nm<\/strong>, t\u00e1n s\u1eafc g\u1ea7n b\u1eb1ng kh\u00f4ng (~0 ps\/nm\u00b7km \u0111\u1ed1i v\u1edbi s\u1ee3i G.652).<br>.<\/p><\/li><li><p>T\u1ea1i <strong>1550 nm<\/strong>, t\u00e1n s\u1eafc cao h\u01a1n (th\u01b0\u1eddng ~16\u201318 ps\/nm\u00b7km).<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1n s\u1eafc th\u1ea5p h\u01a1n t\u1ea1i 1310 nm gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c truy\u1ec1n d\u1eabn 10G l\u00ean \u0111\u1ebfn 10\u201320 km m\u00e0 kh\u00f4ng c\u1ea7n b\u00f9. Tuy nhi\u00ean, khi kho\u1ea3ng c\u00e1ch t\u0103ng l\u00ean, suy hao\u2014ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u00e1n s\u1eafc\u2014tr\u1edf th\u00e0nh gi\u1edbi h\u1ea1n ch\u1ee7 \u0111\u1ea1o.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n (25G, 40G, 100G), t\u00e1n s\u1eafc t\u1ea1i 1550 nm ph\u1ea3i \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd c\u1ea9n th\u1eadn, \u0111\u00f4i khi y\u00eau c\u1ea7u c\u00e1c module b\u00f9 t\u00e1n s\u1eafc (DCM) ho\u1eb7c k\u1ef9 thu\u1eadt d\u00f2 t\u00edn hi\u1ec7u \u0111\u1ed3ng pha trong c\u00e1c h\u1ec7 th\u1ed1ng ti\u00ean ti\u1ebfn.<br>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi EDFA<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t l\u1ee3i th\u1ebf quan tr\u1ecdng c\u1ee7a vi\u1ec7c truy\u1ec1n d\u1eabn t\u1ea1i 1550 nm l\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi<br> <strong>b\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha t\u1ea1p erbium (EDFA)<br><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c EDFA ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 trong d\u1ea3i C (kho\u1ea3ng 1530\u20131565 nm), n\u1eb1m trong c\u1eeda s\u1ed5 truy\u1ec1n d\u1eabn 1550 nm. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u quang m\u00e0 kh\u00f4ng c\u1ea7n t\u00e1i t\u1ea1o \u0111i\u1ec7n<\/p><\/li><li><p>Ph\u1ea1m vi m\u1edf r\u1ed9ng v\u01b0\u1ee3t qu\u00e1 80 km<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 l\u01b0\u1edbi k\u00eanh DWDM<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ec7 th\u1ed1ng 1310 nm kh\u00f4ng \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb khu\u1ebfch \u0111\u1ea1i EDFA th\u1ef1c t\u1ebf, \u0111i\u1ec1u n\u00e0y h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a ch\u00fang cho c\u00e1c kho\u1ea3ng c\u00e1ch r\u1ea5t d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b6 T\u1ea1i sao 1550 nm chi\u1ebfm \u01b0u th\u1ebf v\u01b0\u1ee3t qu\u00e1 40 km<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 1310 nm ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf kho\u1ea3ng c\u00e1ch 10 km v\u00e0 nhi\u1ec1u li\u00ean k\u1ebft 40 km, th\u00ec 1550 nm tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean v\u01b0\u1ee3t qu\u00e1 40 km do:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p>\u0110\u1ed9 suy hao th\u1ea5p h\u01a1n tr\u00ean m\u1ed7i kil\u00f4m\u00e9t<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi khu\u1ebfch \u0111\u1ea1i quang<\/p><\/li><li><p>H\u1ed7 tr\u1ee3<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-dwdm-explaining-dense-wavelength-division-multiplexing\/\">gh\u00e9p k\u00eanh ph\u00e2n chia b\u01b0\u1edbc s\u00f3ng d\u00e0y \u0111\u1eb7c<\/a> (DWDM)<\/p><\/li><li><p>Ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang \u0111\u1ea1t \u0111\u01b0\u1ee3c cao h\u01a1n<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Trong tri\u1ec3n khai th\u1ef1c t\u1ebf, c\u00e1c li\u00ean k\u1ebft 40 km c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 b\u01b0\u1edbc s\u00f3ng n\u00e0o t\u00f9y thu\u1ed9c v\u00e0o r\u00e0ng bu\u1ed9c thi\u1ebft k\u1ebf, nh\u01b0ng c\u00e1c kho\u1ea3ng c\u00e1ch 80 km tr\u1edf l\u00ean ch\u1ee7 y\u1ebfu d\u1ef1a tr\u00ean 1550 nm, th\u01b0\u1eddng s\u1eed d\u1ee5ng quang h\u1ecdc lo\u1ea1i ER ho\u1eb7c ZR.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, 1310 nm mang l\u1ea1i t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 \u0111\u1ed9 t\u00e1n s\u1eafc th\u1ea5p cho c\u00e1c kho\u1ea3ng c\u00e1ch v\u1eeba ph\u1ea3i, trong khi 1550 nm cung c\u1ea5p hi\u1ec7u su\u1ea5t suy hao v\u01b0\u1ee3t tr\u1ed9i v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng t\u1ed1t h\u01a1n cho m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i v\u00e0 m\u1ea1ng \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f Gi\u1ea3i th\u00edch c\u00e1c l\u1edbp ph\u1ea1m vi: 10 km, 40 km, 80 km, 120 km<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo c\u00e1c l\u1edbp ph\u1ea1m vi ti\u00eau chu\u1ea9n \u0111\u1ecbnh ngh\u0129a kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a h\u1ed7 tr\u1ee3 d\u01b0\u1edbi ng\u00e2n s\u00e1ch quang \u0111\u00e3 n\u00eau. C\u00e1c danh m\u1ee5c n\u00e0y\u2014LR, ER v\u00e0 ZR\u2014t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00f4ng su\u1ea5t ph\u00e1t t\u0103ng d\u1ea7n, \u0111\u1ed9 nh\u1ea1y \u0111\u1ea7u thu t\u0103ng d\u1ea7n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng t\u00e1n s\u1eafc t\u0103ng d\u1ea7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c thay \u0111\u1ed5i t\u00f9y theo t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u (1G, 10G, 25G, 100G), c\u00e1c ph\u00e2n lo\u1ea1i sau \u0111\u00e2y ph\u1ea3n \u00e1nh c\u00e1c tri\u1ec3n khai Ethernet 10G \u0111i\u1ec3n h\u00ecnh ph\u00f9 h\u1ee3p v\u1edbi <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-ieee-802-3ae-10-gigabit-ethernet\/\">IEEE 802.3ae<\/a> v\u00e0 th\u1ef1c ti\u1ec5n ng\u00e0nh.<\/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\/a0a037000909488095e1fad13416c935.jpg\" alt=\"Long Distance Transceiver Reach Classes Explained: 10km, 40km, 80km, 120km\" class=\"wp-image-3243\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0a037000909488095e1fad13416c935.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0a037000909488095e1fad13416c935-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0a037000909488095e1fad13416c935-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0a037000909488095e1fad13416c935-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0a037000909488095e1fad13416c935-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 thu ph\u00e1t 10 km (LR \u2013 Ph\u1ea1m vi d\u00e0i)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u00fd hi\u1ec7u \u0111i\u1ec3n h\u00ecnh:<\/strong> <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477648.htm\">10GBASE-LR<\/a><br\/><strong>B\u01b0\u1edbc s\u00f3ng:<\/strong> 1310 nm<br\/><strong>Lo\u1ea1i s\u1ee3i quang:<\/strong> S\u1ee3i quang \u0111\u01a1n mode (SMF)<br\/><strong>Ng\u00e2n s\u00e1ch quang \u0111i\u1ec3n h\u00ecnh:<\/strong> ~6\u20138 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u1ea3i c\u00f4ng su\u1ea5t \u0111i\u1ec3n h\u00ecnh (gi\u00e1 tr\u1ecb v\u00ed d\u1ee5):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (Tx): ~ \u20138,2 dBm \u0111\u1ebfn +0,5 dBm<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y \u0111\u1ea7u thu (Rx): ~ \u201314,4 dBm<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t 10 km ho\u1ea1t \u0111\u1ed9ng g\u1ea7n c\u1eeda s\u1ed5 t\u00e1n s\u1eafc b\u1eb1ng kh\u00f4ng t\u1ea1i 1310 nm, gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c truy\u1ec1n d\u1eabn. Kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i. C\u00e1c m\u00f4-\u0111un n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c k\u1ebft n\u1ed1i trong khu\u00f4n vi\u00ean tr\u01b0\u1eddng v\u00e0 n\u1ed9i th\u00e0nh ph\u1ed1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 thu ph\u00e1t 40 km (ER \u2013 Ph\u1ea1m vi m\u1edf r\u1ed9ng)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u00fd hi\u1ec7u \u0111i\u1ec3n h\u00ecnh:<\/strong> <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476852.htm\">10GBASE-ER<\/a><br\/><strong>B\u01b0\u1edbc s\u00f3ng:<\/strong> 1550 nm<br\/><strong>Lo\u1ea1i s\u1ee3i quang:<\/strong> SMF<br\/><strong>Ng\u00e2n s\u00e1ch quang \u0111i\u1ec3n h\u00ecnh:<\/strong> ~14\u201317 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u1ea3i c\u00f4ng su\u1ea5t \u0111i\u1ec3n h\u00ecnh (gi\u00e1 tr\u1ecb v\u00ed d\u1ee5):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (Tx): ~ \u20131 dBm \u0111\u1ebfn +4 dBm<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y \u0111\u1ea7u thu (Rx): ~ \u201315,8 dBm<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede kho\u1ea3ng c\u00e1ch 40 km, suy hao tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n ch\u00ednh. T\u1ed5n th\u1ea5t s\u1ee3i quang th\u1ea5p h\u01a1n \u1edf b\u01b0\u1edbc s\u00f3ng 1550 nm khi\u1ebfn c\u00e1c b\u1ed9 quang ER tr\u1edf n\u00ean th\u1ef1c t\u1ebf h\u01a1n so v\u1edbi c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf \u1edf 1310 nm cho c\u00e1c kho\u1ea3ng c\u00e1ch t\u1ed1i \u0111a. Vi\u1ec7c khu\u1ebfch \u0111\u1ea1i th\u01b0\u1eddng kh\u00f4ng c\u1ea7n thi\u1ebft cho c\u00e1c tri\u1ec3n khai ti\u00eau chu\u1ea9n 40 km, mi\u1ec5n l\u00e0 ng\u00e2n s\u00e1ch li\u00ean k\u1ebft n\u1eb1m trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00f4-\u0111un quang 80 km (ZR)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u00fd hi\u1ec7u \u0111i\u1ec3n h\u00ecnh:<\/strong> <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476860.htm\">10G ZR<\/a> (th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c nh\u00e0 cung c\u1ea5p)<br\/><strong>B\u01b0\u1edbc s\u00f3ng:<\/strong> 1550 nm<br\/><strong>Lo\u1ea1i s\u1ee3i quang:<\/strong> SMF<br\/><strong>Ng\u00e2n s\u00e1ch quang \u0111i\u1ec3n h\u00ecnh:<\/strong> ~23\u201325 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u1ea3i c\u00f4ng su\u1ea5t \u0111i\u1ec3n h\u00ecnh (gi\u00e1 tr\u1ecb v\u00ed d\u1ee5):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00f4ng su\u1ea5t ph\u00e1t (Tx): ~ 0 dBm \u0111\u1ebfn +5 dBm<\/p><\/li><li><p>\u0110\u1ed9 nh\u1ea1y thu (Rx): ~ \u201324 dBm<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t m\u00f4-\u0111un quang 80 km th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng \u1edf c\u1eeda s\u1ed5 1550 nm do suy hao th\u1ea5p h\u01a1n (~0,20\u20130,25 dB\/km). \u0110\u1ed9 t\u00e1n s\u1eafc s\u1eafc th\u00e1i \u1edf kho\u1ea3ng c\u00e1ch n\u00e0y tr\u1edf n\u00ean \u0111\u00e1ng k\u1ec3 v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t trong c\u00e1c t\u00ednh to\u00e1n thi\u1ebft k\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c khu\u1ebfch \u0111\u1ea1i c\u00f3 th\u1ec3 kh\u00f4ng c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi c\u00e1c \u0111o\u1ea1n s\u1ee3i quang s\u1ea1ch, nh\u01b0ng bi\u00ean d\u1ef1 ph\u00f2ng tr\u1edf n\u00ean h\u1eb9p h\u01a1n. Trong m\u1ea1ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5, b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang s\u1ee3i pha erbium (EDFA) th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ed9 thu ph\u00e1t 100\u2013120 km<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u00fd hi\u1ec7u \u0111i\u1ec3n h\u00ecnh:<\/strong> <a target=\"\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/478078.htm\">B\u1ed9 thu ph\u00e1t 100 km<\/a> ho\u1eb7c ZR n\u00e2ng cao<br\/><strong>B\u01b0\u1edbc s\u00f3ng:<\/strong> 1550 nm (th\u01b0\u1eddng l\u00e0 k\u00eanh DWDM)<br\/><strong>Lo\u1ea1i s\u1ee3i quang:<\/strong> SMF<br\/><strong>Ng\u00e2n s\u00e1ch quang \u0111i\u1ec3n h\u00ecnh:<\/strong> \u226525 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede kho\u1ea3ng c\u00e1ch 100 km tr\u1edf l\u00ean, ri\u00eang suy hao s\u1ee3i quang \u0111\u00e3 c\u00f3 th\u1ec3 \u0111\u1ea1t 20\u201325 dB, ch\u01b0a t\u00ednh t\u1ed5n th\u1ea5t t\u1ea1i c\u00e1c \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i. Trong tri\u1ec3n khai th\u1ef1c t\u1ebf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Khu\u1ebfch \u0111\u1ea1i quang (EDFA)<\/strong> th\u01b0\u1eddng l\u00e0 b\u1eaft bu\u1ed9c.<\/p><\/li><li><p>T\u00edch h\u1ee3p DWDM l\u00e0 ph\u1ed5 bi\u1ebfn.<\/p><\/li><li><p>B\u00f9 t\u00e1n s\u1eafc c\u00f3 th\u1ec3 c\u1ea7n thi\u1ebft t\u00f9y theo t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai trong m\u00f4i tr\u01b0\u1eddng l\u00f5i \u0111\u00f4 th\u1ecb v\u00e0 x\u01b0\u01a1ng s\u1ed1ng v\u00f9ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >So s\u00e1nh LR vs ER vs ZR: T\u00f3m t\u1eaft k\u1ef9 thu\u1eadt<\/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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>L\u1edbp t\u1ea7m xa<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>B\u01b0\u1edbc s\u00f3ng \u0111i\u1ec3n h\u00ecnh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ng\u00e2n s\u00e1ch quang h\u1ecdc<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>C\u1ea7n khu\u1ebfch \u0111\u1ea1i hay kh\u00f4ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>LR<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10 km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1310 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~6\u20138 dB<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>No<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>ER<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng doanh nghi\u1ec7p v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 kho\u1ea3ng c\u00e1ch xa<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1550 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~14\u201317 dB<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng (kho\u1ea3ng c\u00e1ch ti\u00eau chu\u1ea9n)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>ZR<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>80 km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1550 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>~23\u201325 dB<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u00f4i khi<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>ZR n\u00e2ng cao<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>100\u2013120 km<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1550 nm \/ DWDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u226525 dB<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u01b0\u1eddng l\u00e0 c\u00f3<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Khi n\u00e0o c\u1ea7n khu\u1ebfch \u0111\u1ea1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khu\u1ebfch \u0111\u1ea1i quang tr\u1edf n\u00ean c\u1ea7n thi\u1ebft khi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch quang kh\u1ea3 d\u1ee5ng c\u1ee7a m\u00f4-\u0111un<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 ~80 km tr\u00ean s\u1ee3i G.652 ti\u00eau chu\u1ea9n<\/p><\/li><li><p>Nhi\u1ec1u k\u00eanh DWDM y\u00eau c\u1ea7u m\u1ee9c c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng<\/p><\/li><li><p>C\u1ea7n th\u00eam bi\u00ean d\u1ef1 ph\u00f2ng cho hi\u1ec7n t\u01b0\u1ee3ng l\u00e3o h\u00f3a v\u00e0 bi\u1ebfn \u0111\u1ed5i m\u00f4i tr\u01b0\u1eddng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/478919.htm\">b\u1ed9 thu ph\u00e1t 10 km<\/a> v\u00e0 m\u1ed9t b\u1ed9 thu ph\u00e1t 100 km kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 c\u00f4ng su\u1ea5t ph\u00e1t cao h\u01a1n\u2014m\u00e0 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a vi\u1ec7c m\u1edf r\u1ed9ng c\u00f3 ch\u1ee7 \u0111\u00edch ng\u00e2n s\u00e1ch quang, l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng v\u00e0 qu\u1ea3n l\u00fd t\u00e1n s\u1eafc.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f SFP kho\u1ea3ng c\u00e1ch xa so v\u1edbi SFP+ v\u00e0 QSFP<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi thi\u1ebft k\u1ebf c\u00e1c li\u00ean k\u1ebft quang \u0111\u01b0\u1eddng d\u00e0i, vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\"><strong>SFP<\/strong><\/a><strong>, <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\"><strong>SFP+<\/strong><\/a><strong>, and <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26153-40g-qsfp.htm\"><strong>B\u1ed9 thu ph\u00e1t QSFP<\/strong><\/a> l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 tri\u1ec3n khai \u0111\u00fang c\u00e1ch. C\u00e1c module n\u00e0y kh\u00e1c nhau v\u1ec1 h\u1ec7 s\u1ed1 h\u00ecnh d\u1ea1ng, kh\u1ea3 n\u0103ng t\u1ed1c \u0111\u1ed9, m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 \u0111\u1eb7c t\u00ednh nhi\u1ec7t, t\u1ea5t c\u1ea3 \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch m\u1ea1ng cho c\u00e1c \u1ee9ng d\u1ee5ng kho\u1ea3ng c\u00e1ch xa.<\/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\/227d80872f5b486f8de6f2942e253eba.jpg\" alt=\"Long Distance SFP vs. SFP+ vs. QSFP Modules\" class=\"wp-image-3244\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/227d80872f5b486f8de6f2942e253eba.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/227d80872f5b486f8de6f2942e253eba-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/227d80872f5b486f8de6f2942e253eba-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/227d80872f5b486f8de6f2942e253eba-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/227d80872f5b486f8de6f2942e253eba-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 h\u1ec7 s\u1ed1 h\u00ecnh d\u1ea1ng<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>SFP (B\u1ed9 thu ph\u00e1t c\u1eafm r\u1eddi d\u1ea1ng nh\u1ecf)<\/strong><\/p><ul><li><p>Th\u01b0\u1eddng h\u1ed7 tr\u1ee3 <strong>T\u1ed1c \u0111\u1ed9 1G\u20134G<\/strong>, ph\u00f9 h\u1ee3p cho c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa c\u01a1 b\u1ea3n l\u00ean \u0111\u1ebfn 10\u201340 km (lo\u1ea1i LR\/ER).<\/p><\/li><li><p>Module m\u1ed9t k\u00eanh, nh\u1ecf g\u1ecdn.<\/p><\/li><\/ul><\/li><li><p><strong>SFP+<\/strong><\/p><ul><li><p>Bi\u1ebfn th\u1ec3 SFP n\u00e2ng cao h\u1ed7 tr\u1ee3 <strong>Ethernet 10G<\/strong> v\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng 16G\/25G.<\/p><\/li><li><p>C\u00f9ng k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd v\u1edbi SFP nh\u01b0ng c\u00f3 giao di\u1ec7n \u0111i\u1ec7n n\u00e2ng cao v\u00e0 t\u1ed1c \u0111\u1ed9 cao h\u01a1n.<\/p><\/li><\/ul><\/li><li><p><strong>QSFP (Quad Small Form-factor Pluggable)<\/strong><\/p><ul><li><p>H\u1ed7 tr\u1ee3 <strong>4 k\u00eanh<\/strong> m\u1ed7i module, th\u01b0\u1eddng <strong>Y\u00eau c\u1ea7u c\u00e1p s\u1ee3i quang v\u00e0 c\u00f3 th\u1ec3 \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u cao h\u01a1n, nh\u01b0ng m\u1edf r\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n cho s\u1ef1 ph\u00e1t tri\u1ec3n m\u1ea1ng trong t\u01b0\u01a1ng lai.<\/strong> or <strong>100G<br><\/strong> (v\u1edbi <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\">QSFP28<br><\/a>\/100G).<\/p><\/li><li><p>Module l\u1edbn h\u01a1n, m\u1eadt \u0111\u1ed9 cao h\u01a1n, th\u00edch h\u1ee3p cho ki\u1ebfn tr\u00fac spine-leaf trung t\u00e2m d\u1eef li\u1ec7u ho\u1eb7c t\u1ed5ng h\u1ee3p c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >Ti\u00eau Th\u1ee5 N\u0103ng L\u01b0\u1ee3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module t\u1ed1c \u0111\u1ed9 cao h\u01a1n ti\u00eau th\u1ee5 nhi\u1ec1u \u0111i\u1ec7n n\u0103ng h\u01a1n:<\/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>M\u00f4-\u0111un<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng \u0111i\u1ec3n h\u00ecnh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>SFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>0,5\u20131,0 W<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>SFP+<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1,0\u20131,5 W<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>QSFP<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2,5\u20134,0 W<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng cao h\u01a1n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u ch\u00fa \u00fd \u0111\u1eb7c bi\u1ec7t \u0111\u1ebfn qu\u1ea3n l\u00fd nhi\u1ec7t c\u1ee7a switch, nh\u1ea5t l\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa n\u01a1i \u0111\u1ed9 tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ea3n nhi\u1ec7t<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/476093.htm\">C\u00e1c m\u00f4-\u0111un SFP<\/a> t\u1ea1o ra l\u01b0\u1ee3ng nhi\u1ec7t t\u1ed1i thi\u1ec3u do t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00f4ng su\u1ea5t th\u1ea5p h\u01a1n.<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\">m\u00f4-\u0111un SFP+<\/a> sinh ra l\u01b0\u1ee3ng nhi\u1ec7t trung b\u00ecnh v\u00e0 c\u00f3 th\u1ec3 y\u00eau c\u1ea7u qu\u1ea3n l\u00fd lu\u1ed3ng kh\u00ed trong c\u00e1c chassis c\u00f3 m\u1eadt \u0111\u1ed9 l\u1eafp \u0111\u1eb7t cao.<\/p><\/li><li><p><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491483.htm\">C\u00e1c module QSFP<\/a> y\u00eau c\u1ea7u l\u00e0m m\u00e1t ch\u1ee7 \u0111\u1ed9ng ho\u1eb7c lu\u1ed3ng kh\u00ed \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n trong c\u00e1c gi\u00e1 rack c\u00f3 m\u1eadt \u0111\u1ed9 cao.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 l\u00e0 r\u1ea5t quan tr\u1ecdng nh\u1eb1m \u0111\u1ea3m b\u1ea3o <strong>hi\u1ec7u n\u0103ng quang h\u1ecdc d\u00e0i h\u1ea1n<\/strong> v\u00e0 tr\u00e1nh h\u1ecfng h\u00f3c s\u1edbm c\u1ee7a b\u1ed9 thu ph\u00e1t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00ednh t\u01b0\u01a1ng th\u00edch t\u1ed1c \u0111\u1ed9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>SFP:<\/strong> L\u00ean \u0111\u1ebfn 4\u201310G, t\u00f9y theo bi\u1ebfn th\u1ec3<\/p><\/li><li><p><strong>SFP+:<\/strong> L\u00ean \u0111\u1ebfn 10\u201325G, t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c v\u1edbi SFP cho c\u00e1c c\u1ed5ng t\u1ed1c \u0111\u1ed9 th\u1ea5p h\u01a1n<\/p><\/li><li><p><strong>QSFP\/QSFP28:<\/strong> 40\u2013100G, th\u01b0\u1eddng y\u00eau c\u1ea7u c\u00e1p ph\u00e2n nh\u00e1nh (breakout) ho\u1eb7c t\u1ed5ng h\u1ee3p \u0111\u1ec3 t\u01b0\u01a1ng th\u00edch v\u1edbi t\u1ed1c \u0111\u1ed9 th\u1ea5p h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa 10G, SFP+ th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn module \u01b0u ti\u00ean, c\u00e2n b\u1eb1ng gi\u1eefa t\u1ea7m xa, c\u00f4ng su\u1ea5t v\u00e0 chi ph\u00ed \u0111\u1ed3ng th\u1eddi duy tr\u00ec t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi h\u1ea7u h\u1ebft thi\u1ebft b\u1ecb m\u1ea1ng h\u1ed7 tr\u1ee3 10G.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa SFP, SFP+ v\u00e0 QSFP cho c\u00e1c li\u00ean k\u1ebft kho\u1ea3ng c\u00e1ch xa ph\u1ee5 thu\u1ed9c v\u00e0o <strong>t\u1ed1c \u0111\u1ed9 y\u00eau c\u1ea7u, t\u1ea7m xa, gi\u1edbi h\u1ea1n v\u1ec1 c\u00f4ng su\u1ea5t\/nhi\u1ec7t v\u00e0 m\u1eadt \u0111\u1ed9 c\u1ed5ng<\/strong>. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u0111\u01b0\u1eddng truy\u1ec1n xa \u0111\u00e1ng tin c\u1eady \u0111\u1ed3ng th\u1eddi t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf m\u1ea1ng v\u00e0 hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f T\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang cho kho\u1ea3ng c\u00e1ch xa<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t b\u01b0\u1edbc then ch\u1ed1t trong vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c li\u00ean k\u1ebft s\u1ee3i quang kho\u1ea3ng c\u00e1ch xa l\u00e0 th\u1ef1c hi\u1ec7n <strong>t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang<\/strong>, \u0111i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00f4ng su\u1ea5t \u0111\u1ea7u ra c\u1ee7a b\u1ed9 thu ph\u00e1t, t\u1ed5n hao s\u1ee3i quang v\u00e0 \u0111\u1ed9 nh\u1ea1y \u0111\u1ea7u v\u00e0o c\u1ee7a b\u1ed9 thu c\u1ed9ng l\u1ea1i cung c\u1ea5p \u0111\u1ee7 d\u1ef1 ph\u00f2ng \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady.<\/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\/6b2bda09b6d34389a070e5583a932592.jpg\" alt=\"Optical Link Budget Calculation for Long Distance\" class=\"wp-image-3245\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b2bda09b6d34389a070e5583a932592.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b2bda09b6d34389a070e5583a932592-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b2bda09b6d34389a070e5583a932592-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b2bda09b6d34389a070e5583a932592-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6b2bda09b6d34389a070e5583a932592-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00f4ng th\u1ee9c ng\u00e2n s\u00e1ch li\u00ean k\u1ebft<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang t\u1ed5ng qu\u00e1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n nh\u01b0 sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng (dB) = C\u00f4ng su\u1ea5t \u0111\u1ea7u ra b\u1ed9 ph\u00e1t (dBm) \u2212 T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft (dB) \u2212 \u0110\u1ed9 nh\u1ea1y \u0111\u1ea7u v\u00e0o b\u1ed9 thu (dBm)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong \u0111\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u00f4ng su\u1ea5t \u0111\u1ea7u ra b\u1ed9 ph\u00e1t<\/strong> = C\u00f4ng su\u1ea5t \u0111\u1ea7u ra b\u1ed9 ph\u00e1t<\/p><\/li><li><p><strong>\u0110\u1ed9 nh\u1ea1y thu<\/strong> = \u0110\u1ed9 nh\u1ea1y t\u1ed1i thi\u1ec3u c\u1ee7a b\u1ed9 thu<\/p><\/li><li><p><strong>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft<\/strong> = T\u1ed5n hao s\u1ee3i quang + T\u1ed5n hao \u0111\u1ea7u n\u1ed1i + T\u1ed5n hao m\u1ed1i h\u00e0n + D\u1ef1 ph\u00f2ng d\u1ef1 ph\u00f2ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1 ph\u00f2ng h\u1ec7 th\u1ed1ng t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb l\u00e0 \u2265 3 dB \u0111\u1ec3 b\u00f9 cho hi\u1ec7n t\u01b0\u1ee3ng l\u00e3o h\u00f3a, bi\u1ebfn thi\u00ean nhi\u1ec7t \u0111\u1ed9 v\u00e0 c\u00e1c t\u1ed5n hao b\u1ea5t ng\u1edd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00ednh to\u00e1n t\u1ed5n hao s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5n hao s\u1ee3i quang ph\u1ee5 thu\u1ed9c v\u00e0o b\u01b0\u1edbc s\u00f3ng. \u0110\u1ed1i v\u1edbi s\u1ee3i \u0111\u01a1n mode ti\u00eau chu\u1ea9n G.652.D:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>1310 nm: ~0,35 dB\/km<\/p><\/li><li><p>1550 nm: ~0,20 dB\/km<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ed5ng t\u1ed5n hao s\u1ee3i quang (dB) = T\u1ed5n hao s\u1ee3i quang \u00d7 Kho\u1ea3ng c\u00e1ch (km)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5n hao \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i h\u00e0n c\u0169ng c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o t\u00ednh to\u00e1n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ea7u n\u1ed1i \u0111i\u1ec3n h\u00ecnh: 0,5 dB m\u1ed7i c\u00e1i<\/p><\/li><li><p>M\u1ed1i h\u00e0n \u0111i\u1ec3n h\u00ecnh: 0,1\u20130,2 dB m\u1ed7i c\u00e1i<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ed d\u1ee5 minh h\u1ecda: Li\u00ean k\u1ebft 40 km<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Thi\u1ebft k\u1ebf m\u1ed9t <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477952.htm\"><strong>b\u1ed9 thu ph\u00e1t 10GBASE-ER<\/strong><\/a> \u1edf b\u01b0\u1edbc s\u00f3ng 1550 nm:<\/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>M\u1ee5c<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Value<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng su\u1ea5t \u0111\u1ea7u ra b\u1ed9 ph\u00e1t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>+3 dBm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ed9 nh\u1ea1y thu<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u201315,8 dBm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>40 km s\u1ee3i SMF, 0,25 dB\/km<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u n\u1ed1i<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2 \u00d7 0,5 dB<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>M\u1ed1i h\u00e0n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4 \u00d7 0,2 dB<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 1 \u2014 T\u1ed5n hao s\u1ee3i quang<\/strong><br\/>T\u1ed5n hao s\u1ee3i quang = 40 km \u00d7 0,25 dB\/km = 10 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 2 \u2014 T\u1ed5n hao \u0111\u1ea7u n\u1ed1i<\/strong><br\/>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i = 2 \u00d7 0,5 dB = 1 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 3 \u2014 T\u1ed5n hao m\u1ed1i h\u00e0n<\/strong><br\/>T\u1ed5n hao m\u1ed1i h\u00e0n = 4 \u00d7 0,2 dB = 0,8 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 4 \u2014 T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft<\/strong><br\/>T\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft = T\u1ed5n hao s\u1ee3i quang + T\u1ed5n hao \u0111\u1ea7u n\u1ed1i + T\u1ed5n hao m\u1ed1i h\u00e0n = 10 + 1 + 0,8 = 11,8 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 5 \u2014 D\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng<\/strong><br\/>D\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng = C\u00f4ng su\u1ea5t \u0111\u1ea7u ra b\u1ed9 ph\u00e1t \u2212 T\u1ed5ng t\u1ed5n hao \u2212 \u0110\u1ed9 nh\u1ea1y \u0111\u1ea7u v\u00e0o b\u1ed9 thu = 3 \u2212 11,8 \u2212 (\u221215,8) = 7,0 dB<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u01b0\u1edbc 6 \u2014 Ki\u1ec3m tra d\u1ef1 ph\u00f2ng<\/strong><br\/>D\u1ef1 ph\u00f2ng kh\u1ea3 d\u1ee5ng 7 dB v\u01b0\u1ee3t qu\u00e1 m\u1ee9c t\u1ed1i thi\u1ec3u khuy\u1ebfn ngh\u1ecb l\u00e0 3 dB, kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng li\u00ean k\u1ebft 40 km l\u00e0 kh\u1ea3 thi m\u00e0 kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Ghi ch\u00fa<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Bao g\u1ed3m d\u1ef1 ph\u00f2ng d\u1ef1 ph\u00f2ng (1\u20132 dB) cho hi\u1ec7n t\u01b0\u1ee3ng l\u00e3o h\u00f3a, tr\u00f4i nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c t\u1ed5n hao t\u1ea1i b\u1ea3ng \u0111\u1ea5u n\u1ed1i.<\/p><\/li><li><p>\u0110\u1ed1i v\u1edbi kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 80 km, c\u00f3 th\u1ec3 c\u1ea7n khu\u1ebfch \u0111\u1ea1i quang (EDFA).<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft DWDM t\u1ed1c \u0111\u1ed9 cao c\u1ea7n t\u00ednh \u0111\u1ebfn t\u1ed5n hao ph\u1ee5 thu\u1ed9c b\u01b0\u1edbc s\u00f3ng v\u00e0 nhi\u1ec5u xuy\u00ean k\u00eanh.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f \u0110\u1ed9 t\u00e1n s\u1eafc v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u00f3 \u0111\u1ed1i v\u1edbi truy\u1ec1n d\u1eabn \u0111\u01b0\u1eddng d\u00e0i<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00e1n s\u1eafc s\u1eafc m\u00e0u<\/strong> l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t trong truy\u1ec1n d\u1eabn quang s\u1ee3i \u0111\u01b0\u1eddng d\u00e0i, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng \u1edf <strong>1550 nm<\/strong> tr\u00ean s\u1ee3i quang \u0111\u01a1n mode (SMF). Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y x\u1ea3y ra do c\u00e1c b\u01b0\u1edbc s\u00f3ng quang h\u1ecdc kh\u00e1c nhau truy\u1ec1n v\u1edbi t\u1ed1c \u0111\u1ed9 h\u01a1i kh\u00e1c nhau trong s\u1ee3i, g\u00e2y gi\u00e3n xung d\u1eabn \u0111\u1ebfn suy gi\u1ea3m \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 t\u0103ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">t\u1ef7 l\u1ec7 l\u1ed7i bit<\/a> (BER).<br>.<\/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\/e3384b2e6c374b0486ac41e36b96dc0e.jpg\" alt=\"Dispersion and Its Impact on Long-Haul Transmission\" class=\"wp-image-3246\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e3384b2e6c374b0486ac41e36b96dc0e.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e3384b2e6c374b0486ac41e36b96dc0e-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e3384b2e6c374b0486ac41e36b96dc0e-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e3384b2e6c374b0486ac41e36b96dc0e-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/e3384b2e6c374b0486ac41e36b96dc0e-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 t\u00e1n s\u1eafc s\u1eafc k\u00fd t\u1ea1i 1550 nm<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ee3i SMF ti\u00eau chu\u1ea9n (G.652.D) th\u1ec3 hi\u1ec7n \u0111\u1ed9 t\u00e1n s\u1eafc s\u1eafc k\u00fd \u0111i\u1ec3n h\u00ecnh l\u00e0 <strong>~16\u201318 ps\/nm\u00b7km<\/strong> t\u1ea1i 1550 nm.<\/p><\/li><li><p>T\u1ea1i 1310 nm, \u0111\u1ed9 t\u00e1n s\u1eafc g\u1ea7n b\u1eb1ng kh\u00f4ng (~0 ps\/nm\u00b7km), v\u00ec v\u1eady c\u00e1c thi\u1ebft b\u1ecb quang 1310 nm \u0111\u01b0\u1ee3c \u01b0u ti\u00ean s\u1eed d\u1ee5ng cho c\u00e1c li\u00ean k\u1ebft c\u1ef1 ly ng\u1eafn (&lt;10 km).<\/p><\/li><li><p>\u0110\u1ed1i v\u1edbi 1550 nm, \u0111\u1ed9 t\u00e1n s\u1eafc t\u00edch l\u0169y t\u0103ng tuy\u1ebfn t\u00ednh theo kho\u1ea3ng c\u00e1ch. V\u00ed d\u1ee5:<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>V\u00ed d\u1ee5:<\/strong><br\/>40 km \u00d7 17 ps\/nm\u00b7km = 680 ps\/nm t\u1ed5ng \u0111\u1ed9 t\u00e1n s\u1eafc<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 m\u1ee9c \u0111\u1ed9 n\u00e0y kh\u00e1 khi\u00eam t\u1ed1n \u1edf t\u1ed1c \u0111\u1ed9 10G, nh\u01b0ng n\u00f3 tr\u1edf n\u00ean \u0111\u00e1ng k\u1ec3 \u0111\u1ed1i v\u1edbi c\u00e1c li\u00ean k\u1ebft t\u1ed1c \u0111\u1ed9 cao h\u01a1n (25G, 100G), n\u01a1i chu k\u1ef3 k\u00fd hi\u1ec7u ng\u1eafn h\u01a1n v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng gi\u00e3n xung c\u00f3 th\u1ec3 ch\u1ed3ng l\u1ea5n l\u00ean c\u00e1c bit li\u1ec1n k\u1ec1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ed1i quan h\u1ec7 gi\u1eefa kho\u1ea3ng c\u00e1ch v\u00e0 t\u1ed1c \u0111\u1ed9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1c \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9 t\u00e1n s\u1eafc t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi c\u1ea3 hai y\u1ebfu t\u1ed1 <strong>li\u00ean k\u1ebft y\u00eau c\u1ea7u<\/strong> and <strong>100G<\/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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>25Gbps<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Chu k\u1ef3 k\u00fd hi\u1ec7u<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ph\u1ea1m vi t\u1ed1i \u0111a x\u1ea5p x\u1ec9 m\u00e0 kh\u00f4ng c\u1ea7n b\u00f9 tr\u1eeb<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>100 ps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>80 km (ER\/ZR)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>25G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>40 ps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>40\u201350 km<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>100G<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10 ps<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>10\u201320 km<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u0103ng l\u00ean, c\u00f9ng m\u1ed9t l\u01b0\u1ee3ng \u0111\u1ed9 t\u00e1n s\u1eafc t\u00edch l\u0169y s\u1ebd l\u00e0m gi\u1ea3m ph\u1ea1m vi t\u1ed1i \u0111a \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1c bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c m\u00f4-\u0111un b\u00f9 \u0111\u1ed9 t\u00e1n s\u1eafc (DCM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi \u0111\u1ed9 t\u00e1n s\u1eafc t\u00edch l\u0169y ti\u1ebfn g\u1ea7n \u0111\u1ebfn ng\u01b0\u1ee1ng ch\u1ecbu \u0111\u1ef1ng c\u1ee7a h\u1ec7 th\u1ed1ng, <strong>c\u00e1c m\u00f4-\u0111un b\u00f9 \u0111\u1ed9 t\u00e1n s\u1eafc (DCM)<\/strong> or <strong>m\u1ea1ng Bragg s\u1ee3i quang<\/strong> \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1ea3m gi\u00e3n xung m\u1ed9t c\u00e1ch ch\u1ee7 \u0111\u1ed9ng ho\u1eb7c th\u1ee5 \u0111\u1ed9ng<\/p><\/li><li><p>Kh\u00f4i ph\u1ee5c s\u1ef1 c\u0103n ch\u1ec9nh v\u1ec1 th\u1eddi gian c\u1ee7a c\u00e1c xung quang<\/p><\/li><li><p>M\u1edf r\u1ed9ng ph\u1ea1m vi hi\u1ec7u d\u1ee5ng c\u1ee7a c\u00e1c li\u00ean k\u1ebft 1550 nm m\u00e0 kh\u00f4ng thay \u0111\u1ed5i lo\u1ea1i b\u1ed9 thu ph\u00e1t<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00f4ng ngh\u1ec7 ph\u00e1t hi\u1ec7n \u0111\u1ed3ng pha ti\u00ean ti\u1ebfn trong c\u00e1c m\u1ea1ng DWDM 100G+ c\u0169ng cho ph\u00e9p b\u00f9 tr\u1eeb \u0111i\u1ec7n t\u1eed, t\u1eeb \u0111\u00f3 gi\u1ea3m th\u00eam \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 t\u00e1n s\u1eafc s\u1eafc k\u00fd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Khi \u0111\u1ed9 t\u00e1n s\u1eafc tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 t\u00e1n s\u1eafc kh\u00f4ng c\u00f2n c\u00f3 th\u1ec3 b\u1ecf qua khi:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p>Kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 40\u201380 km \u1edf t\u1ed1c \u0111\u1ed9 25G tr\u1edf l\u00ean<\/p><\/li><li><p>C\u00e1c k\u00eanh DWDM c\u00f3 m\u1eadt \u0111\u1ed9 ph\u1ed5 cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng c\u00e2n b\u1eb1ng t\u1ea1i b\u1ed9 thu v\u00e0 \u0111\u1ed9 nh\u1ea1y c\u1ee7a b\u1ed9 thu ph\u00e1t kh\u00f4ng th\u1ec3 b\u00f9 tr\u1eeb ho\u00e0n to\u00e0n hi\u1ec7n t\u01b0\u1ee3ng gi\u00e3n xung<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, k\u1ef9 s\u01b0 quang h\u1ecdc ph\u1ea3i t\u00ednh to\u00e1n t\u1ed5ng \u0111\u1ed9 t\u00e1n s\u1eafc t\u00edch l\u0169y v\u00e0 l\u1ef1a ch\u1ecdn DCM ph\u00f9 h\u1ee3p ho\u1eb7c b\u1ed9 thu ph\u00e1t \u0111\u1ed3ng pha \u0111\u1ec3 duy tr\u00ec <strong>BER &lt; 10\u207b\u00b9\u00b2<\/strong>, \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eabn kh\u00f4ng l\u1ed7i tr\u00ean c\u00e1c m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea7n n\u00e0y \u0111\u1ea3m b\u1ea3o c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf m\u1ea1ng hi\u1ec3u r\u00f5 <strong>c\u00e1ch \u0111\u1ed9 t\u00e1n s\u1eafc t\u01b0\u01a1ng t\u00e1c v\u1edbi b\u01b0\u1edbc s\u00f3ng, t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u v\u00e0 kho\u1ea3ng c\u00e1ch<\/strong>, m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng khi l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t ER\/ZR ho\u1eb7c <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/489213.htm\">DWDM<\/a> cho c\u00e1c tri\u1ec3n khai kho\u1ea3ng c\u00e1ch xa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f DWDM v\u00e0 c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110a b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (DWDM)<\/strong> l\u00e0 c\u00f4ng ngh\u1ec7 cho ph\u00e9p nhi\u1ec1u t\u00edn hi\u1ec7u quang, m\u1ed7i t\u00edn hi\u1ec7u \u1edf m\u1ed9t b\u01b0\u1edbc s\u00f3ng ri\u00eang bi\u1ec7t, chia s\u1ebb m\u1ed9t s\u1ee3i c\u00e1p quang duy nh\u1ea5t. \u0110\u1ed1i v\u1edbi <strong>truy\u1ec1n d\u1eabn d\u00e0i<\/strong>, c\u00e1c b\u1ed9 thu ph\u00e1t DWDM gi\u00fap c\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng t\u1ed1i \u0111a h\u00f3a dung l\u01b0\u1ee3ng s\u1ee3i quang trong khi v\u1eabn duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u tr\u00ean c\u00e1c kho\u1ea3ng c\u00e1ch v\u01b0\u1ee3t qu\u00e1 40\u201380 km.<\/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\/faa6c4967465466290584c02bb0ff715.jpg\" alt=\"DWDM and Long Distance Transceivers\" class=\"wp-image-3247\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/faa6c4967465466290584c02bb0ff715.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/faa6c4967465466290584c02bb0ff715-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/faa6c4967465466290584c02bb0ff715-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/faa6c4967465466290584c02bb0ff715-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/faa6c4967465466290584c02bb0ff715-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Kho\u1ea3ng c\u00e1ch k\u00eanh<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ec7 th\u1ed1ng DWDM ho\u1ea1t \u0111\u1ed9ng v\u1edbi kho\u1ea3ng c\u00e1ch k\u00eanh <strong>\u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c<\/strong> nh\u1eb1m tr\u00e1nh nhi\u1ec5u:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>kho\u1ea3ng c\u00e1ch 100 GHz<\/strong> (~0,8 nm ch\u00eanh l\u1ec7ch b\u01b0\u1edbc s\u00f3ng) \u2014 ph\u1ed5 bi\u1ebfn trong c\u00e1c m\u1ea1ng DWDM th\u1ebf h\u1ec7 c\u0169 v\u00e0 m\u1ea1ng \u0111\u00f4 th\u1ecb<\/p><\/li><li><p><strong>kho\u1ea3ng c\u00e1ch 50 GHz<\/strong> (~0,4 nm ch\u00eanh l\u1ec7ch b\u01b0\u1edbc s\u00f3ng) \u2014 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i c\u00f3 dung l\u01b0\u1ee3ng cao<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch nh\u1ecf h\u01a1n l\u00e0m t\u0103ng m\u1eadt \u0111\u1ed9 k\u00eanh nh\u01b0ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh b\u01b0\u1edbc s\u00f3ng cao h\u01a1n v\u00e0 dung sai b\u1ed9 thu ph\u00e1t ch\u1eb7t ch\u1ebd h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kh\u00e1i ni\u1ec7m l\u01b0\u1edbi b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/484537.htm\">M\u00f4-\u0111un SFP DWDM<\/a> c\u00e1c b\u1ed9 thu ph\u00e1t tu\u00e2n th\u1ee7 <strong>l\u01b0\u1edbi b\u01b0\u1edbc s\u00f3ng ti\u00eau chu\u1ea9n ITU-T<\/strong> (d\u1ea3i C, ~1530\u20131565 nm):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed7i k\u00eanh \u0111\u01b0\u1ee3c g\u00e1n m\u1ed9t b\u01b0\u1edbc s\u00f3ng c\u1ed1 \u0111\u1ecbnh theo l\u01b0\u1edbi<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c nh\u00e0 cung c\u1ea5p kh\u00e1c nhau<\/p><\/li><li><p>Cho ph\u00e9p truy\u1ec1n \u0111\u1ed3ng th\u1eddi h\u00e0ng ch\u1ee5c k\u00eanh tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang m\u00e0 kh\u00f4ng g\u00e2y nhi\u1ec5u ch\u00e9o<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1i ni\u1ec7m n\u00e0y gi\u00fap c\u00e1c nh\u00e0 khai th\u00e1c m\u1edf r\u1ed9ng dung l\u01b0\u1ee3ng m\u00e0 kh\u00f4ng c\u1ea7n l\u1eafp \u0111\u1eb7t th\u00eam s\u1ee3i quang, \u0111i\u1ec1u \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi m\u1ea1ng \u0111\u00f4 th\u1ecb, v\u00f9ng v\u00e0 \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Quang h\u1ecdc \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t DWDM ti\u00ean ti\u1ebfn c\u00f3 th\u1ec3 t\u00edch h\u1ee3p laser \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c, cho ph\u00e9p c\u00f9ng m\u1ed9t ph\u1ea7n c\u1ee9ng ho\u1ea1t \u0111\u1ed9ng tr\u00ean nhi\u1ec1u k\u00eanh DWDM:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gi\u1ea3m t\u1ed3n kho v\u00e0 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c c\u1ea5p ph\u00e1t m\u1ea1ng<\/p><\/li><li><p>Cho ph\u00e9p t\u00e1i ph\u00e2n b\u1ed5 k\u00eanh linh ho\u1ea1t theo nhu c\u1ea7u l\u01b0u l\u01b0\u1ee3ng<\/p><\/li><li><p>H\u1ed7 tr\u1ee3 \u0111\u1ecbnh tuy\u1ebfn b\u01b0\u1edbc s\u00f3ng t\u1ef1 \u0111\u1ed9ng trong c\u00e1c b\u1ed9 gh\u00e9p t\u00e1ch quang c\u1ea5u h\u00ecnh l\u1ea1i \u0111\u01b0\u1ee3c (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/roadm-reconfigurable-optical-add-drop-multiplexer-guide\/\">B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn quang c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh l\u1ea1i (ROADMs)<\/a>)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Quang h\u1ecdc \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn trong c\u00e1c tri\u1ec3n khai \u0111\u01b0\u1eddng d\u00e0i c\u00f3 dung l\u01b0\u1ee3ng cao, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c m\u1ea1ng h\u1ed7 tr\u1ee3 100G, 400G ho\u1eb7c cao h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Khi n\u00e0o c\u1ea7n s\u1eed d\u1ee5ng DWDM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DWDM tr\u1edf n\u00ean c\u1ea7n thi\u1ebft khi:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p>Dung l\u01b0\u1ee3ng s\u1ee3i quang ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ed1i \u0111a h\u00f3a m\u00e0 kh\u00f4ng c\u1ea7n l\u1eafp \u0111\u1eb7t th\u00eam c\u1eb7p s\u1ee3i<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi ti\u00eau chu\u1ea9n c\u1ee7a c\u00e1c b\u1ed9 thu ph\u00e1t ER\/ZR v\u00e0 c\u1ea7n khu\u1ebfch \u0111\u1ea1i<\/p><\/li><li><p>Nhi\u1ec1u d\u1ecbch v\u1ee5 ho\u1eb7c kh\u00e1ch h\u00e0ng chia s\u1ebb c\u00f9ng m\u1ed9t c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang v\u1eadt l\u00fd<\/p><\/li><li><p>C\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng c\u1ea7n c\u00e1c l\u1ed9 tr\u00ecnh n\u00e2ng c\u1ea5p c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng cho c\u00e1c b\u1ed9 thu ph\u00e1t t\u1ed1c \u0111\u1ed9 cao trong t\u01b0\u01a1ng lai<\/p><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng DWDM, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf m\u1ea1ng \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ea3 t\u1ea7m ph\u1ee7 s\u00f3ng m\u1edf r\u1ed9ng v\u00e0 hi\u1ec7u su\u1ea5t ph\u1ed5 cao, khi\u1ebfn DWDM tr\u1edf th\u00e0nh gi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng cho c\u00e1c m\u1ea1ng quang \u0111\u01b0\u1eddng d\u00e0i hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi tri\u1ec3n khai b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tri\u1ec3n khai <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/477981.htm\">SFP kho\u1ea3ng c\u00e1ch xa<\/a> Vi\u1ec7c tri\u1ec3n khai b\u1ed9 thu ph\u00e1t \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00fa \u00fd c\u1ea9n th\u1eadn \u0111\u1ebfn ng\u00e2n s\u00e1ch quang, l\u1ef1a ch\u1ecdn b\u01b0\u1edbc s\u00f3ng v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb. Nh\u1eefng sai s\u00f3t c\u00f3 th\u1ec3 g\u00e2y ra m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft, t\u0103ng t\u1ef7 l\u1ec7 l\u1ed7i bit ho\u1eb7c th\u1eadm ch\u00ed l\u1ed7i thi\u1ebft b\u1ecb. Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t bao g\u1ed3m:<\/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\/97988464243b4c7189d0e67bd80aa3cb.jpg\" alt=\"Common Long Distance Transceivers Deployment Mistakes\" class=\"wp-image-3248\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/97988464243b4c7189d0e67bd80aa3cb.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/97988464243b4c7189d0e67bd80aa3cb-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/97988464243b4c7189d0e67bd80aa3cb-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/97988464243b4c7189d0e67bd80aa3cb-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/97988464243b4c7189d0e67bd80aa3cb-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u00e1y thu (Rx) b\u1ecb qu\u00e1 t\u1ea3i c\u00f4ng su\u1ea5t<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng su\u1ea5t quang qu\u00e1 m\u1ee9c t\u1ea1i m\u00e1y thu c\u00f3 th\u1ec3 l\u00e0m b\u00e3o h\u00f2a \u0111i-\u1ed1t quang, g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e9o t\u00edn hi\u1ec7u<\/p><\/li><li><p>T\u0103ng t\u1ef7 l\u1ec7 l\u1ed7i bit (BER)<\/p><\/li><li><p>M\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft ti\u1ec1m \u1ea9n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o r\u1eb1ng <strong>c\u00f4ng su\u1ea5t nh\u1eadn \u0111\u01b0\u1ee3c n\u1eb1m trong d\u1ea3i Rx quy \u0111\u1ecbnh c\u1ee7a b\u1ed9 thu ph\u00e1t<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >D\u1ef1 ph\u00f2ng ng\u00e2n s\u00e1ch quang kh\u00f4ng \u0111\u1ee7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng t\u00ednh to\u00e1n \u0111\u1ea7y \u0111\u1ee7 ng\u00e2n s\u00e1ch quang\u2014bao g\u1ed3m suy hao s\u1ee3i, \u0111\u1ea7u n\u1ed1i, m\u1ed1i h\u00e0n v\u00e0 d\u1ef1 ph\u00f2ng\u2014c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c li\u00ean k\u1ebft \u1edf ng\u01b0\u1ee1ng gi\u1edbi h\u1ea1n, suy gi\u1ea3m theo tu\u1ed5i th\u1ecd s\u1ee3i ho\u1eb7c thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9<\/p><\/li><li><p>Gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 b\u1ea5t ng\u1edd<\/p><\/li><li><p>\u0110\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n gi\u1ea3m<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t gi\u00e1 tr\u1ecb d\u1ef1 ph\u00f2ng t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb <strong>t\u1eeb 3\u20135 dB<\/strong> lu\u00f4n ph\u1ea3i \u0111\u01b0\u1ee3c duy tr\u00ec.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1eed d\u1ee5ng b\u01b0\u1edbc s\u00f3ng 1310 nm v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/481432.htm\">C\u00e1c b\u1ed9 thu ph\u00e1t 1310 nm<\/a> ph\u00f9 h\u1ee3p cho kho\u1ea3ng c\u00e1ch <strong>\u226410 km (lo\u1ea1i LR)<\/strong> v\u00e0 \u0111\u00f4i khi l\u00ean t\u1edbi 40 km trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t. Vi\u1ec7c s\u1eed d\u1ee5ng ch\u00fang cho c\u00e1c kho\u1ea3ng c\u00e1ch d\u00e0i h\u01a1n s\u1ebd g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Su suy hao qu\u00e1 m\u1ee9c<\/p><\/li><li><p>Gi\u1ea3m d\u1ef1 ph\u00f2ng li\u00ean k\u1ebft<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi khu\u1ebfch \u0111\u1ea1i EDFA (ho\u1ea1t \u0111\u1ed9ng \u1edf b\u01b0\u1edbc s\u00f3ng 1550 nm)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n ch\u1ecdn b\u01b0\u1edbc s\u00f3ng ph\u00f9 h\u1ee3p v\u1edbi kho\u1ea3ng c\u00e1ch m\u1ee5c ti\u00eau.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >B\u1ecf qua hi\u1ec7n t\u01b0\u1ee3ng l\u00e3o h\u00f3a s\u1ee3i quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Theo th\u1eddi gian, s\u1ee3i quang ch\u1ecbu \u1ea3nh h\u01b0\u1edfng b\u1edfi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Su\u1ea5t suy hao t\u0103ng do c\u00e1c u\u1ed1n cong vi m\u00f4, m\u1ed1i h\u00e0n v\u00e0 suy gi\u1ea3m \u0111\u1ea7u n\u1ed1i<\/p><\/li><li><p>C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng, ch\u1eb3ng h\u1ea1n nh\u01b0 dao \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c b\u1ecf qua hi\u1ec7n t\u01b0\u1ee3ng l\u00e3o h\u00f3a s\u1ee3i quang c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m d\u1ef1 ph\u00f2ng hi\u1ec7u d\u1ee5ng v\u00e0 r\u00fat ng\u1eafn tu\u1ed5i th\u1ecd li\u00ean k\u1ebft. <strong>C\u1ea7n \u0111\u01b0a y\u1ebfu t\u1ed1 d\u1ef1 ph\u00f2ng cho l\u00e3o h\u00f3a v\u00e0o t\u00ednh to\u00e1n<\/strong> khi l\u1eadp ng\u00e2n s\u00e1ch li\u00ean k\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u1ea5n \u0111\u1ec1 t\u01b0\u01a1ng th\u00edch firmware<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch gi\u1eefa firmware nh\u00e0 cung c\u1ea5p ho\u1eb7c m\u00e3 h\u00f3a b\u1ed9 thu ph\u00e1t c\u00f3 th\u1ec3 g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a do l\u1ed7i<\/p><\/li><li><p>Th\u1ea5t b\u1ea1i trong vi\u1ec7c nh\u1eadn di\u1ec7n module<\/p><\/li><li><p>D\u1eef li\u1ec7u DOM kh\u00f4ng nh\u1ea5t qu\u00e1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n x\u00e1c minh r\u1eb1ng firmware b\u1ed9 thu ph\u00e1t v\u00e0 firmware thi\u1ebft b\u1ecb ch\u1ee7 t\u01b0\u01a1ng th\u00edch v\u1edbi nhau v\u00e0 tu\u00e2n theo \u0111\u1eb7c t\u1ea3 c\u1ee7a nh\u00e0 cung c\u1ea5p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y, k\u1ef9 s\u01b0 m\u1ea1ng c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o <strong>ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh trong th\u1eddi gian d\u00e0i<\/strong> c\u1ee7a c\u00e1c li\u00ean k\u1ebft b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa v\u00e0 duy tr\u00ec hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u tr\u00ean c\u00e1c m\u1ea1ng \u0111\u00f4 th\u1ecb, v\u00f9ng v\u00e0 \u0111\u01b0\u1eddng truy\u1ec1n xa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f Danh s\u00e1ch ki\u1ec3m tra x\u00e1c th\u1ef1c b\u1ed9 thu ph\u00e1t \u0111\u01b0\u1eddng truy\u1ec1n xa tr\u01b0\u1edbc khi tri\u1ec3n khai<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi tri\u1ec3n khai b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa, vi\u1ec7c th\u1ef1c hi\u1ec7n danh s\u00e1ch ki\u1ec3m tra x\u00e1c th\u1ef1c c\u00f3 c\u1ea5u tr\u00fac s\u1ebd \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady, ng\u0103n ng\u1eeba s\u1ef1 c\u1ed1 li\u00ean k\u1ebft v\u00e0 t\u1ed1i \u0111a h\u00f3a tu\u1ed5i th\u1ecd h\u1ec7 th\u1ed1ng. Danh s\u00e1ch ki\u1ec3m tra n\u00e0y k\u1ebft h\u1ee3p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t trong k\u1ef9 thu\u1eadt quang h\u1ecdc v\u1edbi vi\u1ec7c x\u00e1c minh thi\u1ebft b\u1ecb.<\/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\/5d3fbba56fe94d65825bcfee421bec12.jpg\" alt=\"Validation Long Haul Transceiver Checklist Before Deployment\" class=\"wp-image-3249\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5d3fbba56fe94d65825bcfee421bec12.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5d3fbba56fe94d65825bcfee421bec12-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5d3fbba56fe94d65825bcfee421bec12-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5d3fbba56fe94d65825bcfee421bec12-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5d3fbba56fe94d65825bcfee421bec12-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2714 X\u00e1c nh\u1eadn lo\u1ea1i c\u00e1p quang (ch\u1ec9 c\u00e1p quang \u0111\u01a1n mode \u2013 SMF)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho <strong>v\u00e0 s\u1ee3i quang \u0111\u01a1n mode (SMF)<\/strong>. Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p quang \u0111a mode (MMF) c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Su suy hao qu\u00e1 m\u1ee9c<\/p><\/li><li><p>T\u00e1n s\u1eafc mode<\/p><\/li><li><p>S\u1ef1 c\u1ed1 li\u00ean k\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n x\u00e1c minh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00e1p quang v\u00e0 lo\u1ea1i \u0111\u1ea7u n\u1ed1i tr\u01b0\u1edbc khi l\u1eafp module.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2714 T\u00ednh t\u1ed5ng t\u1ed5n hao li\u00ean k\u1ebft<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh ng\u00e2n s\u00e1ch li\u00ean k\u1ebft quang \u0111\u1ea7y \u0111\u1ee7 bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/attenuation-in-optical-transceiver-management-and-solutions\/\">Su\u1ea5t suy hao s\u1ee3i quang<\/a> (dB\/km \u00d7 kho\u1ea3ng c\u00e1ch)<\/p><\/li><li><p>T\u1ed5n hao \u0111\u1ea7u n\u1ed1i (th\u01b0\u1eddng l\u00e0 0,5 dB m\u1ed7i \u0111\u1ea7u n\u1ed1i)<\/p><\/li><li><p>T\u1ed5n hao m\u1ed1i n\u1ed1i (0,1\u20130,2 dB m\u1ed7i m\u1ed1i n\u1ed1i)<\/p><\/li><li><p>D\u1ef1 ph\u00f2ng d\u1ef1 ph\u00f2ng (\u22653 dB)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea3m b\u1ea3o <strong>C\u00f4ng su\u1ea5t ph\u00e1t \u2212 t\u1ed5ng t\u1ed5n hao \u2212 \u0111\u1ed9 nh\u1ea1y thu \u2265 d\u1ef1 ph\u00f2ng khuy\u1ebfn ngh\u1ecb<\/strong> \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2714 X\u00e1c minh \u0111\u1ed9 nh\u1ea1y thu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ec3m tra xem \u0111\u1ed9 nh\u1ea1y t\u1ed1i thi\u1ec3u c\u1ee7a b\u1ed9 thu c\u00f3 kh\u1edbp v\u1edbi c\u00f4ng su\u1ea5t d\u1ef1 ki\u1ebfn t\u1ea1i \u0111\u1ea7u s\u1ee3i quang hay kh\u00f4ng. T\u00edn hi\u1ec7u qu\u00e1 m\u1ea1nh ho\u1eb7c qu\u00e1 y\u1ebfu c\u00f3 th\u1ec3 g\u00e2y ra:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u00e3o h\u00f2a \u0111i-\u1ed1t quang<\/p><\/li><li><p>L\u1ed7i bit ho\u1eb7c li\u00ean k\u1ebft ch\u1eadp ch\u1eddn<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2714 Ki\u1ec3m tra gi\u1edbi h\u1ea1n t\u00e1n s\u1eafc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c li\u00ean k\u1ebft \u0111\u01b0\u1eddng truy\u1ec1n xa 1550 nm, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/chromatic-dispersion-cd-in-fiber-optics-signal-impact\/\"><strong>t\u00e1n s\u1eafc s\u1eafc \u0111\u1ed9<\/strong><\/a> c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh t\u1ed5ng t\u00e1n s\u1eafc t\u00edch l\u0169y (ps\/nm)<\/p><\/li><li><p>\u0110\u1ea3m b\u1ea3o gi\u00e1 tr\u1ecb n\u00e0y kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 dung sai c\u1ee7a b\u1ed9 thu ph\u00e1t<\/p><\/li><li><p>C\u00e2n nh\u1eafc s\u1eed d\u1ee5ng b\u1ed9 b\u00f9 t\u00e1n s\u1eafc (DCM) ho\u1eb7c ph\u00e1t hi\u1ec7n b\u1eb1ng k\u1ef9 thu\u1eadt \u0111\u1ed3ng pha n\u1ebfu c\u1ea7n thi\u1ebft<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2714 X\u00e1c th\u1ef1c t\u00ednh t\u01b0\u01a1ng th\u00edch firmware<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 kh\u00f4ng kh\u1edbp firmware t\u1eeb nh\u00e0 cung c\u1ea5p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u1ed5ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a do l\u1ed7i<\/p><\/li><li><p>Th\u1ea5t b\u1ea1i trong vi\u1ec7c nh\u1eadn di\u1ec7n module<\/p><\/li><li><p>Kh\u00f4ng nh\u1ea5t qu\u00e1n <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\">DOM<\/a> trong c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ecdc \u0111\u01b0\u1ee3c<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lu\u00f4n x\u00e1c minh firmware b\u1ed9 thu ph\u00e1t ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft b\u1ecb ch\u1ee7 v\u00e0 h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd m\u1ea1ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u2714 X\u00e1c nh\u1eadn l\u01b0\u1edbi b\u01b0\u1edbc s\u00f3ng (DWDM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For <strong>Trong tri\u1ec3n khai DWDM,<\/strong>, h\u00e3y x\u00e1c nh\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>B\u1ed9 thu ph\u00e1t ho\u1ea1t \u0111\u1ed9ng \u1edf k\u00eanh b\u01b0\u1edbc s\u00f3ng ITU-T \u0111\u00fang<\/p><\/li><li><p>C\u00e1c b\u1ed9 quang \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c (tunable optics) \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 \u0111\u00fang c\u00e1ch<\/p><\/li><li><p>Kho\u1ea3ng c\u00e1ch k\u00eanh ph\u00f9 h\u1ee3p v\u1edbi l\u01b0\u1edbi DWDM 50\/100 GHz<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c g\u00e1n k\u00eanh sai c\u00f3 th\u1ec3 g\u00e2y ra <strong>nhi\u1ec5u ch\u00e9o v\u00e0 suy gi\u1ea3m m\u1ea1ng<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tu\u00e2n theo danh s\u00e1ch ki\u1ec3m tra n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa \u0111\u01b0\u1ee3c tri\u1ec3n khai v\u1edbi bi\u00ean \u0111\u1ed9 quang h\u1ecdc ph\u00f9 h\u1ee3p, c\u0103n ch\u1ec9nh b\u01b0\u1edbc s\u00f3ng ch\u00ednh x\u00e1c v\u00e0 h\u1ed7 tr\u1ee3 ph\u1ea7n m\u1ec1m\u56fa\u4ef6, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 b\u1ed9 thu ph\u00e1t SFP kho\u1ea3ng c\u00e1ch xa<\/strong><\/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\/81c3c3134bc34abbb8c59e48392a8643.jpg\" alt=\"Long Range SFP Transceiver FAQs\" class=\"wp-image-3250\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/81c3c3134bc34abbb8c59e48392a8643.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/81c3c3134bc34abbb8c59e48392a8643-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/81c3c3134bc34abbb8c59e48392a8643-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/81c3c3134bc34abbb8c59e48392a8643-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/81c3c3134bc34abbb8c59e48392a8643-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >C1: B\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa c\u00f3 th\u1ec3 truy\u1ec1n d\u1eabn xa bao nhi\u00eau?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p: C\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa \u0111i\u1ec3n h\u00ecnh \u0111\u1ea1t <strong>10 km (LR), 40 km (ER), 80 km (ZR) v\u00e0 tr\u00ean 100 km (ZR n\u00e2ng cao)<\/strong> t\u00f9y thu\u1ed9c v\u00e0o b\u01b0\u1edbc s\u00f3ng, lo\u1ea1i s\u1ee3i quang v\u00e0 ng\u00e2n s\u00e1ch quang h\u1ecdc.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C2: B\u01b0\u1edbc s\u00f3ng 1550 nm c\u00f3 lu\u00f4n b\u1eaft bu\u1ed9c cho kho\u1ea3ng c\u00e1ch 40 km kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p: Kh\u00f4ng ho\u00e0n to\u00e0n b\u1eaft bu\u1ed9c, nh\u01b0ng <strong>b\u01b0\u1edbc s\u00f3ng 1550 nm \u0111\u01b0\u1ee3c \u01b0u ti\u00ean<\/strong> do suy hao s\u1ee3i quang th\u1ea5p h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng t\u1ea7m xa m\u1edf r\u1ed9ng v\u00e0 DWDM. B\u01b0\u1edbc s\u00f3ng 1310 nm th\u01b0\u1eddng b\u1ecb gi\u1edbi h\u1ea1n \u1edf \u226410 km.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C3: T\u00f4i c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i module 40 km v\u1edbi \u0111\u01b0\u1eddng truy\u1ec1n 10 km kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p: C\u00f3, v\u1ec1 m\u1eb7t v\u1eadt l\u00fd th\u00ec c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i, nh\u01b0ng <strong>c\u00f4ng su\u1ea5t nh\u1eadn \u0111\u01b0\u1ee3c c\u00f3 th\u1ec3 qu\u00e1 cao<\/strong>, g\u00e2y b\u00e3o h\u00f2a b\u1ed9 thu (Rx) v\u00e0 l\u00e0m gi\u1ea3m bi\u00ean \u0111\u1ed9 quang h\u1ecdc. C\u00f3 th\u1ec3 c\u1ea7n \u0111i\u1ec1u ch\u1ec9nh c\u00f4ng su\u1ea5t ho\u1eb7c s\u1eed d\u1ee5ng b\u1ed9 suy hao (attenuator).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C4: \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu c\u00f4ng su\u1ea5t quang qu\u00e1 cao?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p: C\u00e1c b\u1ed9 thu b\u1ecb qu\u00e1 t\u1ea3i c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i <strong>m\u00e9o t\u00edn hi\u1ec7u, t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) t\u0103ng v\u00e0 m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/strong>. Lu\u00f4n v\u1eadn h\u00e0nh trong ph\u1ea1m vi c\u00f4ng su\u1ea5t nh\u1eadn (Rx) \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh cho b\u1ed9 thu ph\u00e1t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C5: C\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa c\u00f3 y\u00eau c\u1ea7u khu\u1ebfch \u0111\u1ea1i kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p: Ch\u1ec9 khi <strong>t\u1ed5ng t\u1ed5n hao \u0111\u01b0\u1eddng truy\u1ec1n v\u01b0\u1ee3t qu\u00e1 ng\u00e2n s\u00e1ch quang h\u1ecdc c\u1ee7a module<\/strong>, th\u01b0\u1eddng \u00e1p d\u1ee5ng cho c\u00e1c \u0111o\u1ea1n c\u00e1p d\u00e0i h\u01a1n 80\u2013100 km ho\u1eb7c c\u00e1c tri\u1ec3n khai DWDM d\u00e0y \u0111\u1eb7c. Khi c\u1ea7n thi\u1ebft, s\u1ebd s\u1eed d\u1ee5ng b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang EDFA ho\u1eb7c b\u1ed9 khu\u1ebfch \u0111\u1ea1i n\u1ed9i tuy\u1ebfn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2b50\ufe0f T\u00f3m t\u1eaft tri\u1ec3n khai b\u1ed9 thu ph\u00e1t \u0111\u01b0\u1eddng d\u00e0i<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi <strong>c\u00e1c m\u1ea1ng quang t\u1ed1c \u0111\u1ed9 cao, \u0111\u01b0\u1eddng d\u00e0i<\/strong>, cho ph\u00e9p k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady tr\u00ean kho\u1ea3ng c\u00e1ch 10 km, 40 km, 80 km ho\u1eb7c xa h\u01a1n. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang <strong>b\u01b0\u1edbc s\u00f3ng, ng\u00e2n s\u00e1ch \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 qu\u1ea3n l\u00fd t\u00e1n s\u1eafc<\/strong> \u0111\u1ea3m b\u1ea3o truy\u1ec1n d\u1eabn kh\u00f4ng l\u1ed7i v\u00e0 \u1ed5n \u0111\u1ecbnh m\u1ea1ng. Tu\u00e2n th\u1ee7 <strong>danh s\u00e1ch ki\u1ec3m tra x\u00e1c th\u1ef1c<\/strong> v\u00e0 tr\u00e1nh c\u00e1c sai l\u1ea7m tri\u1ec3n khai ph\u1ed5 bi\u1ebfn gi\u00fap gi\u1ea3m r\u1ee7i ro v\u1eadn h\u00e0nh v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0 (ROI).<\/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\/fffcdbba49e741fc8a50012373702d64.jpg\" alt=\"LINK-PP Long-Haul Transceivers\" class=\"wp-image-3251\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fffcdbba49e741fc8a50012373702d64.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fffcdbba49e741fc8a50012373702d64-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fffcdbba49e741fc8a50012373702d64-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fffcdbba49e741fc8a50012373702d64-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fffcdbba49e741fc8a50012373702d64-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 t\u00ecm c\u00e1c module \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao, ph\u00f9 h\u1ee3p cho tri\u1ec3n khai \u0111\u01b0\u1eddng d\u00e0i, h\u00e3y kh\u00e1m ph\u00e1 <a target=\"\" rel=\"\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a> d\u00e0nh ri\u00eang cho c\u00e1c b\u1ed9 thu ph\u00e1t SFP, SFP+ v\u00e0 DWDM \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Ti\u00eau chu\u1ea9n v\u00e0 tu\u00e2n th\u1ee7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un quang kho\u1ea3ng c\u00e1ch xa tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c, an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>IEEE 802.3ae \/ 802.3ba<\/strong> \u2013 \u0110\u1ecbnh ngh\u0129a c\u00e1c giao di\u1ec7n quang Ethernet 10G\/40G v\u00e0 ph\u00e2n lo\u1ea1i ph\u1ea1m vi chu\u1ea9n h\u00f3a (LR, ER, ZR).<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/sfp-8472-standard-explained-ddm-for-optical-transceivers\/\"><strong>Long-distance fiber links<\/strong><\/a> \u2013 Quy \u0111\u1ecbnh kh\u1ea3 n\u0103ng DOM (Gi\u00e1m s\u00e1t quang k\u1ef9 thu\u1eadt s\u1ed1), cho ph\u00e9p gi\u00e1m s\u00e1t th\u1eddi gian th\u1ef1c c\u00f4ng su\u1ea5t quang, nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111i\u1ec7n \u00e1p.<\/p><\/li><li><p><strong>tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh an to\u00e0n quang h\u1ecdc<\/strong> \u2013 \u0110\u1ea3m b\u1ea3o c\u00e1c m\u00f4-\u0111un \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n IEC\/EN v\u1ec1 an to\u00e0n m\u1eaft v\u00e0 ph\u00e2n lo\u1ea1i laser.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y mang l\u1ea1i s\u1ef1 tin c\u1eady v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, gi\u1ea3m r\u1ee7i ro t\u00edch h\u1ee3p v\u00e0 cho ph\u00e9p c\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng duy tr\u00ec c\u00e1c li\u00ean k\u1ebft quang kho\u1ea3ng c\u00e1ch xa c\u00f3 hi\u1ec7u su\u1ea5t cao, an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c b\u1ed9 thu ph\u00e1t kho\u1ea3ng c\u00e1ch xa, bao g\u1ed3m quang h\u1ecdc t\u1eeb 10 km \u0111\u1ebfn 120 km, so s\u00e1nh 1310 nm v\u00e0 1550 nm, c\u00e1c module ER\/ZR, t\u00ednh to\u00e1n ng\u00e2n s\u00e1ch li\u00ean k\u1ebft v\u00e0 c\u00e1c th\u1ef1c ti\u1ec5n tri\u1ec3n khai t\u1ed1t nh\u1ea5t.<\/p>","protected":false},"author":1,"featured_media":3252,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[24,26],"class_list":["post-3253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products","tag-link-pp","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3253","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=3253"}],"version-history":[{"count":3,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3253\/revisions"}],"predecessor-version":[{"id":10769,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3253\/revisions\/10769"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3252"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}