{"id":5275,"date":"2025-09-01T00:00:00","date_gmt":"2025-09-01T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/optical-transceiver-return-loss-back-reflection-guide\/"},"modified":"2026-06-22T07:57:49","modified_gmt":"2026-06-22T07:57:49","slug":"optical-transceiver-return-loss-back-reflection-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceiver-return-loss-back-reflection-guide","title":{"rendered":"T\u1ed5n hao ph\u1ea3n h\u1ed3i trong b\u1ed9 thu ph\u00e1t quang l\u00e0 g\u00ec? (RL \/ Ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c)"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27aa3f771fac4f1682068e1b985c95fe.webp\" alt=\"Optical Transceiver Return Loss (ORL \/ Back-reflection)\" class=\"wp-image-5272\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27aa3f771fac4f1682068e1b985c95fe.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27aa3f771fac4f1682068e1b985c95fe-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27aa3f771fac4f1682068e1b985c95fe-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27aa3f771fac4f1682068e1b985c95fe-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/27aa3f771fac4f1682068e1b985c95fe-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 Gi\u1edbi thi\u1ec7u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi th\u1ea3o lu\u1eadn v\u1ec1 b\u1ed9 thu ph\u00e1t quang v\u00e0 m\u1ea1ng s\u1ee3i quang, c\u00e1c k\u1ef9 s\u01b0 th\u01b0\u1eddng t\u1eadp trung v\u00e0o t\u1ed1c \u0111\u1ed9, b\u01b0\u1edbc s\u00f3ng ho\u1eb7c kho\u1ea3ng c\u00e1ch truy\u1ec1n. Tuy nhi\u00ean, m\u1ed9t th\u00f4ng s\u1ed1 quan tr\u1ecdng kh\u00e1c\u2014<strong>T\u1ed5n hao ph\u1ea3n h\u1ed3i (RL)<\/strong>\u2014\u0111\u00f4i khi b\u1ecb b\u1ecf qua, d\u00f9 n\u00f3 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a ngu\u1ed3n s\u00e1ng v\u00e0 hi\u1ec7u n\u0103ng t\u1ed5ng th\u1ec3 c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5n hao ph\u1ea3n h\u1ed3i \u0111o l\u01b0\u1eddng l\u01b0\u1ee3ng c\u00f4ng su\u1ea5t quang b\u1ecb ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i b\u1ed9 ph\u00e1t do c\u00e1c khi\u1ebfm khuy\u1ebft t\u1ea1i \u0111\u1ea7u n\u1ed1i, m\u1ed1i n\u1ed1i ho\u1eb7c giao di\u1ec7n. Trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 10G, 100G ho\u1eb7c th\u1eadm ch\u00ed 800G, t\u1ed5n hao ph\u1ea3n h\u1ed3i k\u00e9m c\u00f3 th\u1ec3 l\u00e0m t\u0103ng l\u1ed7i bit, gi\u1ea3m \u0111\u1ed9 tin c\u1eady h\u1ec7 th\u1ed1ng v\u00e0 r\u00fat ng\u1eafn tu\u1ed5i th\u1ecd linh ki\u1ec7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i gi\u1ea3i th\u00edch t\u1ed5n hao ph\u1ea3n h\u1ed3i l\u00e0 g\u00ec, l\u00fd do n\u00f3 quan tr\u1ecdng, c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh \u0111i\u1ec3n h\u00ecnh v\u00e0 c\u00e1ch <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">c\u00e1c module quang LINK-PP<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u n\u0103ng t\u1ed5n hao ph\u1ea3n h\u1ed3i cao cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao ph\u1ea3n h\u1ed3i quang (ORL) \u0111o l\u01b0\u1eddng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i trong c\u00e1c h\u1ec7 th\u1ed1ng s\u1ee3i quang. Gi\u00e1 tr\u1ecb ORL c\u00e0ng cao cho th\u1ea5y ch\u1ea5t l\u01b0\u1ee3ng truy\u1ec1n d\u1eabn c\u00e0ng t\u1ed1t.<\/p><\/li><li><p>Vi\u1ec7c ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 t\u1ed5n hao ph\u1ea3n h\u1ed3i l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 tin c\u1eady m\u1ea1ng. S\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng nh\u01b0 <strong>OTDR v\u00e0 OCWR<\/strong> \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1.<\/p><\/li><li><p>\u0110\u1ec3 gi\u1ea3m thi\u1ec3u t\u1ed5n hao ph\u1ea3n h\u1ed3i, h\u00e3y l\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng, d\u00f9ng \u0111\u1ea7u n\u1ed1i APC v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 thi c\u00f4ng v\u00e0 b\u1ea3o tr\u00ec s\u1ee3i quang.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 T\u1ed5n hao ph\u1ea3n h\u1ed3i l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ed5n hao ph\u1ea3n h\u1ed3i (RL)<\/strong> m\u00f4 t\u1ea3 t\u1ef7 l\u1ec7 gi\u1eefa c\u00f4ng su\u1ea5t quang t\u1edbi \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o h\u1ec7 th\u1ed1ng so v\u1edbi c\u00f4ng su\u1ea5t ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i ngu\u1ed3n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ecbnh ngh\u0129a:<\/strong><br\/>RL = 10 \u00d7 log\u2081\u2080 (Pin \/ Preflected)<\/p><\/li><li><p><strong>\u0110\u01a1n v\u1ecb:<\/strong> Decibel (dB)<\/p><\/li><li><p><strong>Di\u1ec5n gi\u1ea3i:<\/strong> Gi\u00e1 tr\u1ecb RL c\u00e0ng cao cho th\u1ea5y c\u00f4ng su\u1ea5t ph\u1ea3n x\u1ea1 c\u00e0ng \u00edt v\u00e0 do \u0111\u00f3 hi\u1ec7u n\u0103ng c\u00e0ng t\u1ed1t.<\/p><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"320\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3cf6ca7375e14bacab9be0be1f434124.webp\" alt=\"Optical Transceiver Return Loss \" class=\"wp-image-5273\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3cf6ca7375e14bacab9be0be1f434124.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3cf6ca7375e14bacab9be0be1f434124-300x80.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3cf6ca7375e14bacab9be0be1f434124-1024x273.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3cf6ca7375e14bacab9be0be1f434124-768x205.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3cf6ca7375e14bacab9be0be1f434124-18x5.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>RL = 20 dB \u2192 1% c\u00f4ng su\u1ea5t b\u1ecb ph\u1ea3n x\u1ea1<\/p><\/li><li><p>RL = 40 dB \u2192 0,01% c\u00f4ng su\u1ea5t b\u1ecb ph\u1ea3n x\u1ea1<\/p><\/li><li><p>RL = 60 dB \u2192 ph\u1ea3n x\u1ea1 g\u1ea7n nh\u01b0 kh\u00f4ng \u0111\u00e1ng k\u1ec3<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 T\u1ea1i sao t\u1ed5n hao ph\u1ea3n h\u1ed3i quang l\u1ea1i quan tr\u1ecdng?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a laser<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng su\u1ea5t quang ph\u1ea3n x\u1ea1 c\u00f3 th\u1ec3 quay tr\u1edf l\u1ea1i bu\u1ed3ng laser c\u1ee7a b\u1ed9 ph\u00e1t, g\u00e2y ra <strong>hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea3y mode, nhi\u1ec5u c\u01b0\u1eddng \u0111\u1ed9 ho\u1eb7c m\u1ea5t \u1ed5n \u0111\u1ecbnh t\u1ea7n s\u1ed1<\/strong>. \u0110i\u1ec1u n\u00e0y l\u00e0m suy gi\u1ea3m \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c h\u1ec7 th\u1ed1ng t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ef7 l\u1ec7 l\u1ed7i bit (BER)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u1ea3n x\u1ea1 g\u00e2y nhi\u1ec5u quang h\u1ecdc v\u00e0 rung \u0111\u1ed9ng (jitter). \u1ede t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n (25G, 100G ho\u1eb7c cao h\u01a1n), ngay c\u1ea3 ph\u1ea3n x\u1ea1 nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn \u0111\u00e1ng k\u1ec3<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\"><strong>BER<\/strong><\/a><strong> t\u0103ng<br><\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ph\u01a1i s\u00e1ng laser l\u00e2u d\u00e0i v\u1edbi c\u00f4ng su\u1ea5t ph\u1ea3n x\u1ea1 l\u00e0m t\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a, r\u00fat ng\u1eafn tu\u1ed5i th\u1ecd c\u1ee7a<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">b\u1ed9 thu ph\u00e1t quang<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00ednh linh ho\u1ea1t trong thi\u1ebft k\u1ebf m\u1ea1ng<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch gi\u1ea3m thi\u1ec3u ph\u1ea3n x\u1ea1, c\u00e1c nh\u00e0 khai th\u00e1c c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n d\u00e0i h\u01a1n, nhi\u1ec1u \u0111\u1ea7u n\u1ed1i h\u01a1n ho\u1eb7c c\u00e1c th\u00e0nh ph\u1ea7n quang th\u1ee5 \u0111\u1ed9ng ph\u1ee9c t\u1ea1p h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m suy gi\u1ea3m hi\u1ec7u su\u1ea5t.<br>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 C\u00e1c ti\u00eau chu\u1ea9n \u0111i\u1ec3n h\u00ecnh v\u1ec1 t\u1ed5n hao ph\u1ea3n h\u1ed3i (Return Loss)<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Y\u00eau c\u1ea7u v\u1ec1 t\u1ed5n hao ph\u1ea3n h\u1ed3i thay \u0111\u1ed5i t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i \u0111\u1ea7u n\u1ed1i s\u1ee3i quang v\u00e0 \u1ee9ng d\u1ee5ng m\u1ea1ng.<br>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ea7u n\u1ed1i PC (Physical Contact)<br><\/strong>: RL \u2265 40 dB<br><\/p><\/li><li><p><strong>\u0110\u1ea7u n\u1ed1i UPC (Ultra Physical Contact)<br><\/strong>: RL \u2265 50 dB<br><\/p><\/li><li><p><strong>C\u00e1c \u0111\u1ea7u n\u1ed1i APC (Angled Physical Contact)<\/strong>: RL \u2265 60 dB<br><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi b\u1ed9 thu ph\u00e1t quang (optical transceivers):<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>H\u1ea7u h\u1ebft c\u00e1c ti\u00eau chu\u1ea9n IEEE v\u00e0<br> <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/multi-source-agreements-optical-transceivers\/\">gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1.<\/a> quy \u0111\u1ecbnh RL \u2265 26 dB t\u1ea1i c\u1ed5ng quang.<br>.<\/p><\/li><li><p>Trong th\u1ef1c t\u1ebf, c\u00e1c module hi\u1ec7u n\u0103ng cao \u0111\u1ea1t \u0111\u01b0\u1ee3c RL \u2265 30 dB ho\u1eb7c cao h\u01a1n.<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 T\u1ed5n hao ph\u1ea3n h\u1ed3i (Return Loss) so v\u1edbi \u0111\u1ed9 ph\u1ea3n x\u1ea1 (Reflectance)<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 c\u00f3 li\u00ean quan, t\u1ed5n hao ph\u1ea3n h\u1ed3i th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi \u0111\u1ed9 ph\u1ea3n x\u1ea1.<br>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ed9 ph\u1ea3n x\u1ea1 (Reflectance)<br><\/strong> = t\u1ef7 l\u1ec7 gi\u1eefa c\u00f4ng su\u1ea5t ph\u1ea3n x\u1ea1 v\u00e0 c\u00f4ng su\u1ea5t t\u1edbi (bi\u1ec3u th\u1ecb d\u01b0\u1edbi d\u1ea1ng gi\u00e1 tr\u1ecb dB \u00e2m).<br>.<\/p><\/li><li><p><strong>T\u1ed5n hao ph\u1ea3n x\u1ea1 (Return Loss)<\/strong> = gi\u00e1 tr\u1ecb dB d\u01b0\u01a1ng, \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng 10 log(Pin\/Pref).<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u1ed5n hao ph\u1ea3n h\u1ed3i cao (v\u00ed d\u1ee5: 60 dB) = \u0111\u1ed9 ph\u1ea3n x\u1ea1 th\u1ea5p (v\u00ed d\u1ee5: \u221260 dB).<br>.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 Nguy\u00ean nh\u00e2n g\u00e2y t\u1ed5n hao ph\u1ea3n h\u1ed3i k\u00e9m<br><\/h2>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>Khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t \u0111\u1ea7u n\u1ed1i<br><\/strong>: Tr\u1ea7y x\u01b0\u1edbc, b\u1ee5i b\u1ea9n ho\u1eb7c \u0111\u00e1nh b\u00f3ng k\u00e9m.<br>.<\/p><\/li><li><p><strong>Khe h\u1edf kh\u00f4ng kh\u00ed<br><\/strong>: Ngay c\u1ea3 kho\u1ea3ng c\u00e1ch t\u00e1ch nh\u1ecf nh\u1ea5t gi\u1eefa c\u00e1c \u0111\u1ea7u n\u1ed1i c\u0169ng g\u00e2y ra ph\u1ea3n x\u1ea1 Fresnel.<br>.<\/p><\/li><li><p><strong>Kh\u00f4ng kh\u1edbp giao di\u1ec7n<br><\/strong>: S\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i PC v\u1edbi \u0111\u1ea7u n\u1ed1i APC g\u00e2y ra ph\u1ea3n x\u1ea1 \u0111\u00e1ng k\u1ec3.<br>.<\/p><\/li><li><p><strong>\u0110\u1ee9t ho\u1eb7c cong s\u1ee3i quang<br><\/strong>: C\u00e1c s\u1ef1 c\u1ed1 v\u1eadt l\u00fd tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n s\u1ee3i quang ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng tr\u1edf l\u1ea1i.<br>.<\/p><\/li><li><p><strong>B\u1ed9 thu ph\u00e1t quang ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p<br><\/strong>: Thi\u1ebft k\u1ebf quang h\u1ecdc b\u00ean trong k\u00e9m c\u00f3 th\u1ec3 kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u1ee7 ph\u1ea3n x\u1ea1.<br>.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 \u0110o t\u1ed5n hao ph\u1ea3n h\u1ed3i<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n \u0111o t\u1ed5n hao ph\u1ea3n h\u1ed3i quang b\u1eb1ng c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng. Vi\u1ec7c ki\u1ec3m tra gi\u00fap b\u1ea1n x\u00e1c minh ch\u1ea5t l\u01b0\u1ee3ng c\u00e1c k\u1ebft n\u1ed1i s\u1ee3i quang v\u00e0 ph\u00e1t hi\u1ec7n b\u1ea5t k\u1ef3 v\u1ea5n \u0111\u1ec1 n\u00e0o li\u00ean quan \u0111\u1ebfn \u0111\u1ed9 ph\u1ea3n x\u1ea1 ho\u1eb7c t\u1ed5n hao.<br>.<br\/>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 ph\u1ed5 bi\u1ebfn \u0111\u1ec3 ki\u1ec3m tra t\u1ed5n hao ph\u1ea3n h\u1ed3i tr\u00ean s\u1ee3i quang:<br><\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 323px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"323\"><p>Thi\u1ebft b\u1ecb<br><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4 t\u1ea3<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"323\"><p>OCWR (Optical Continuous Wave Reflectometer)<br><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110o \u0111\u1ed9 ph\u1ea3n x\u1ea1 ho\u1eb7c t\u1ed5n hao ph\u1ea3n h\u1ed3i quang c\u1ee7a \u0111\u1ea7u n\u1ed1i. Ch\u1ee7 y\u1ebfu d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ea7u n\u1ed1i.<br>.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"323\"><p>OTDR (B\u1ed9 ph\u1ea3n x\u1ea1 k\u1ebf mi\u1ec1n th\u1eddi gian quang h\u1ecdc)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1eed d\u1ee5ng ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed l\u1ed7i, t\u1ed1i \u01b0u h\u00f3a c\u00e1c m\u1ed1i n\u1ed1i v\u00e0 \u0111o t\u1ed5n hao d\u1ef1a tr\u00ean h\u1ec7 s\u1ed1 ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c v\u00e0 t\u1ed5n hao s\u1ee3i quang.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n n\u00ean th\u1ef1c hi\u1ec7n ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ea1ng c\u1ee7a m\u00ecnh \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u1ec1 t\u1ed5n hao ph\u1ea3n x\u1ea1. \u0110\u1ed1i v\u1edbi \u0111\u1ea7u n\u1ed1i \u0111\u01a1n mode, b\u1ea1n c\u1ea7n \u0111\u1ea1t t\u1ed5n hao ph\u1ea3n x\u1ea1 t\u1ed1i thi\u1ec3u l\u00e0 55 dB, nh\u01b0 khuy\u1ebfn ngh\u1ecb b\u1edfi <strong>IEC 61753-1<\/strong>. \u0110\u1ea7u n\u1ed1i \u0111a mode n\u00ean \u0111\u1ea1t \u00edt nh\u1ea5t 35 dB. Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y gi\u00fap b\u1ea1n tr\u00e1nh suy gi\u1ea3m t\u00edn hi\u1ec7u v\u00e0 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng truy\u1ec1n d\u1eabn cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00f4ng ngh\u1ec7 s\u1ee3i quang ph\u00e1t tri\u1ec3n, nh\u1eefng \u0111\u1ed5i m\u1edbi nh\u01b0 \u0111\u1ea7u n\u1ed1i g\u1ed1m c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u0103n ch\u1ec9nh v\u00e0 gi\u1ea3m <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceiver-insertion-loss-definition-impact\/\">t\u1ed5n hao ch\u00e8n<\/a>. Nh\u1eefng ti\u1ebfn b\u1ed9 n\u00e0y gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng h\u01a1n trong vi\u1ec7c qu\u1ea3n l\u00fd t\u1ed5n hao ph\u1ea3n x\u1ea1 quang (ORL) trong c\u00e1c m\u1ea1ng s\u1ee3i th\u1ee7y tinh. <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>LINK-PP <\/strong><\/a>s\u1ea3n ph\u1ea9m t\u00edch h\u1ee3p c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y, mang l\u1ea1i hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady v\u00e0 ORL xu\u1ea5t s\u1eafc.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>L\u01b0u \u00fd: Ki\u1ec3m tra t\u1ed5n hao ph\u1ea3n x\u1ea1 quang l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u1ea1ng. Lu\u00f4n s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n v\u00e0 tu\u00e2n theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 C\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t \u0111\u1ec3 c\u1ea3i thi\u1ec7n t\u1ed5n hao ph\u1ea3n x\u1ea1<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>S\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i APC<\/strong> trong c\u00e1c \u1ee9ng d\u1ee5ng DWDM nh\u1ea1y c\u1ea3m, CATV v\u00e0 t\u1ed1c \u0111\u1ed9 cao.<\/p><\/li><li><p><strong>L\u00e0m s\u1ea1ch \u0111\u1ea7u n\u1ed1i \u0111\u00fang c\u00e1ch<\/strong> b\u1eb1ng kh\u0103n lau kh\u00f4ng x\u01a1 v\u00e0 c\u1ed3n isopropyl.<\/p><\/li><li><p><strong>Ki\u1ec3m tra v\u00e0 \u0111o th\u1eed<\/strong> b\u1eb1ng \u0111\u1ed3ng h\u1ed3 \u0111o T\u1ed5n hao Ph\u1ea3n x\u1ea1 Quang (ORL meter).<\/p><\/li><li><p><strong>Ch\u1ecdn c\u00e1c b\u1ed9 thu ph\u00e1t quang ch\u1ea5t l\u01b0\u1ee3ng cao<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi kh\u1ea3 n\u0103ng \u1ee9c ch\u1ebf ph\u1ea3n x\u1ea1.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 B\u1ed9 thu ph\u00e1t quang LINK-PP v\u00e0 T\u1ed5n hao Ph\u1ea3n x\u1ea1<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/db7661b53bae455d8e4eccfae211b734.jpg\" alt=\"LINK-PP SFP Optical Transceivers\" class=\"wp-image-5274\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/db7661b53bae455d8e4eccfae211b734.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/db7661b53bae455d8e4eccfae211b734-300x178.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/db7661b53bae455d8e4eccfae211b734-1024x608.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/db7661b53bae455d8e4eccfae211b734-768x456.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/db7661b53bae455d8e4eccfae211b734-18x12.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c k\u1ef9 s\u01b0 LINK-PP hi\u1ec3u r\u1eb1ng t\u1ed5n hao ph\u1ea3n x\u1ea1 kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u1ea1ng. C\u00e1c m\u00f4-\u0111un quang c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 c\u00e1c ti\u00eau chu\u1ea9n RL c\u1ee7a ng\u00e0nh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >S\u1ea3n ph\u1ea9m v\u00ed d\u1ee5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/475586.htm\"><strong>10G SFP+ LR 1310 nm<\/strong><\/a> \u2013 \u0110\u1ea3m b\u1ea3o RL \u2265 30 dB cho c\u00e1c li\u00ean k\u1ebft \u0111\u01b0\u1eddng d\u00e0i \u1ed5n \u0111\u1ecbnh l\u00ean \u0111\u1ebfn 10 km.<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/476046.htm\"><strong>25G SFP28 LR<\/strong><\/a> \u2013 Hi\u1ec7u su\u1ea5t RL cao, l\u00fd t\u01b0\u1edfng cho c\u00e1c k\u1ebft n\u1ed1i trung t\u00e2m d\u1eef li\u1ec7u.<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/482370.htm\"><strong>100G QSFP28 CWDM4<\/strong><\/a> \u2013 RL \u2265 30 dB, h\u1ed7 tr\u1ee3 tri\u1ec3n khai \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y v\u00e0 vi\u1ec5n th\u00f4ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch duy tr\u00ec ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t v\u00e0 thi\u1ebft k\u1ebf quang h\u1ecdc ti\u00ean ti\u1ebfn, <strong>C\u00e1c m\u00f4-\u0111un LINK-PP<\/strong> cung c\u1ea5p hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n ngay c\u1ea3 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec1u \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i h\u00e0n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u1ed5n hao ph\u1ea3n x\u1ea1<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t nh\u01b0ng th\u01b0\u1eddng b\u1ecb hi\u1ec3u sai trong m\u1ea1ng quang. Gi\u00e1 tr\u1ecb RL cao \u0111\u1ea3m b\u1ea3o b\u1ed9 ph\u00e1t \u1ed5n \u0111\u1ecbnh, t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) th\u1ea5p v\u00e0 tu\u1ed5i th\u1ecd linh ki\u1ec7n d\u00e0i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch l\u1ef1a ch\u1ecdn c\u00e1c m\u00f4-\u0111un quang c\u00f3 hi\u1ec7u su\u1ea5t t\u1ed5n hao ph\u1ea3n x\u1ea1 \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng, nh\u01b0 c\u00e1c s\u1ea3n ph\u1ea9m t\u1eeb <strong>LINK-PP<\/strong>, c\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111\u00e1ng tin c\u1eady v\u00e0 d\u1ec5 m\u1edf r\u1ed9ng, s\u1eb5n s\u00e0ng cho c\u00e1c t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u th\u1ebf h\u1ec7 ti\u1ebfp theo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu b\u1ea1n \u0111ang l\u1eadp k\u1ebf ho\u1ea1ch tri\u1ec3n khai m\u1edbi ho\u1eb7c n\u00e2ng c\u1ea5p c\u00e1c li\u00ean k\u1ebft hi\u1ec7n c\u00f3, h\u00e3y c\u00e2n nh\u1eafc vai tr\u00f2 c\u1ee7a t\u1ed5n hao ph\u1ea3n x\u1ea1 m\u1ed9t c\u00e1ch c\u1ea9n tr\u1ecdng \u2014 v\u00e0 \u0111\u1eb7t ni\u1ec1m tin v\u00e0o <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm?ca=1487&amp;cv=8306\">c\u00e1c module quang LINK-PP<\/a> \u0111\u1ec3 gi\u1eef cho m\u1ea1ng c\u1ee7a b\u1ea1n lu\u00f4n \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25c6 Xem th\u00eam<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/common-optical-transceiver-failures-and-solutions\/\">Hi\u1ec3u v\u1ec1 s\u1ef1 c\u1ed1 b\u1ed9 thu ph\u00e1t quang: C\u00e1c v\u1ea5n \u0111\u1ec1 ch\u00ednh v\u00e0 gi\u1ea3i ph\u00e1p<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/overview-of-optical-transceivers\/\">H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00f4ng ngh\u1ec7 b\u1ed9 thu ph\u00e1t quang<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-transceiver-performance-tests\/\">M\u1eb9o duy tr\u00ec hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh c\u1ee7a b\u1ed9 thu ph\u00e1t quang<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-optical-transceivers-transmit-data\/\">C\u01a1 ch\u1ebf truy\u1ec1n d\u1eef li\u1ec7u trong b\u1ed9 thu ph\u00e1t quang<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/quality-certifications-optical-transceivers\/\">C\u00e1c ch\u1ee9ng nh\u1eadn thi\u1ebft y\u1ebfu \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9 thu ph\u00e1t quang<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u v\u1ec1 t\u1ed5n hao ph\u1ea3n x\u1ea1 quang (optical return loss) trong c\u00e1c b\u1ed9 thu ph\u00e1t, l\u00fd do v\u00ec sao n\u00f3 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u1ea1ng v\u00e0 c\u00e1ch c\u00e1c m\u00f4-\u0111un LINK-PP mang l\u1ea1i hi\u1ec7u su\u1ea5t RL cao.<\/p>","protected":false},"author":1,"featured_media":5272,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[26],"class_list":["post-5275","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5275","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=5275"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5275\/revisions"}],"predecessor-version":[{"id":11202,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5275\/revisions\/11202"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5272"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}