{"id":4284,"date":"2025-09-17T11:12:00","date_gmt":"2025-09-17T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/differential-mode-delay-impact-on-fiber-speed-and-quality\/"},"modified":"2026-06-22T07:04:28","modified_gmt":"2026-06-22T07:04:28","slug":"differential-mode-delay-impact-on-fiber-speed-and-quality","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/differential-mode-delay-impact-on-fiber-speed-and-quality","title":{"rendered":"\u0110\u1ed9 Tr\u1ec5 Ch\u1ebf \u0110\u1ed9 Kh\u00e1c Nhau (DMD) \u0110\u01b0\u1ee3c Gi\u1ea3i Th\u00edch R\u00f5: K\u1ebb Th\u00f9 \u1ea8n C\u1ee7a S\u1ee3i Quang \u0110a Ch\u1ebf \u0110\u1ed9 T\u1ed1c \u0110\u1ed9 Cao"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1312\" height=\"736\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/65cf021a46e44a539769c59c83a63c09.webp\" alt=\"What Differential Mode Delay Means for Fiber Speed\" class=\"wp-image-4282\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/65cf021a46e44a539769c59c83a63c09.webp 1312w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/65cf021a46e44a539769c59c83a63c09-300x168.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/65cf021a46e44a539769c59c83a63c09-1024x574.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/65cf021a46e44a539769c59c83a63c09-768x431.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/65cf021a46e44a539769c59c83a63c09-18x10.webp 18w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong n\u1ed7 l\u1ef1c kh\u00f4ng ng\u1eebng nh\u1eb1m x\u00e2y d\u1ef1ng c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng doanh nghi\u1ec7p nhanh h\u01a1n, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/om1-om2-om3-om4-om5-multimode-fiber-guide\/\"><strong>s\u1ee3i quang \u0111a mode (MMF)<\/strong><\/a> \u0111\u00e3 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady. T\u00ednh hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u cho c\u00e1c \u1ee9ng d\u1ee5ng kho\u1ea3ng c\u00e1ch ng\u1eafn. Tuy nhi\u00ean, khi ch\u00fang ta \u0111\u1ea9y m\u1ea1nh t\u1ed1c \u0111\u1ed9 cao h\u01a1n\u2014t\u1eeb 10G l\u00ean 40G, 100G v\u00e0 xa h\u01a1n n\u1eefa\u2014m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng tinh t\u1ebf nh\u01b0ng mang t\u00ednh quy\u1ebft \u0111\u1ecbnh b\u1eaft \u0111\u1ea7u xu\u1ea5t hi\u1ec7n: <strong>\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n (DMD)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c b\u1ecf qua DMD c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c l\u1ed7i bit b\u00ed \u1ea9n, gi\u1ea3m ph\u1ea1m vi k\u1ebft n\u1ed1i v\u00e0 c\u00e1c s\u1ef1 c\u1ed1 hi\u1ec7u su\u1ea5t m\u1ea1ng g\u00e2y kh\u00f3 ch\u1ecbu. H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd ph\u00e2n t\u00edch ch\u1ee7 \u0111\u1ec1 ph\u1ee9c t\u1ea1p n\u00e0y, gi\u1ea3i th\u00edch t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ed1i v\u1edbi m\u1ea1ng c\u1ee7a b\u1ea1n v\u00e0 ch\u1ec9 cho b\u1ea1n c\u00e1ch l\u1ef1a ch\u1ecdn c\u00e1c th\u00e0nh ph\u1ea7n ph\u00f9 h\u1ee3p\u2014v\u00ed d\u1ee5 nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/page\/aboutus.htm\"><strong>LINK-PP<\/strong><\/a>\u2018c\u00e1c m\u00f4-\u0111un quang cao c\u1ea5p c\u1ee7a , l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 kh\u1eafc ph\u1ee5c v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd Nh\u1eefng \u0111i\u1ec3m c\u1ea7n ghi nh\u1edb ch\u00ednh<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n (DMD) l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u trong c\u00e1p quang. Hi\u1ec3u r\u00f5 v\u1ec1 DMD gi\u00fap b\u1ea1n ch\u1ecdn lo\u1ea1i c\u00e1p quang t\u1ed1t nh\u1ea5t cho t\u1ed1c \u0111\u1ed9 cao.<\/p><\/li><li><p>Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p quang \u0111a mode \u00edt ch\u1ebf \u0111\u1ed9 gi\u00fap gi\u1ea3m DMD. \u0110i\u1ec1u n\u00e0y gi\u1eef c\u00e1c xung \u00e1nh s\u00e1ng g\u1ea7n nhau v\u00e0 d\u1ec5 \u0111\u1ecdc h\u01a1n. T\u1eeb \u0111\u00f3 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u v\u00e0 gi\u1ea3m sai s\u00f3t.<\/p><\/li><li><p>H\u00e3y th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra c\u00e1p quang c\u1ee7a b\u1ea1n v\u1ec1 DMD. Vi\u1ec7c n\u00e0y gi\u00fap b\u1ea1n ph\u00e1t hi\u1ec7n s\u1edbm s\u1ef1 c\u1ed1 v\u00e0 duy tr\u00ec m\u1ea1ng lu\u00f4n nhanh ch\u00f3ng v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p><\/li><li><p>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t c\u00e1p quang t\u1ed1t l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. Kh\u00f4ng u\u1ed1n cong c\u00e1p qu\u00e1 s\u1eafc v\u00e0 lu\u00f4n gi\u1eef c\u00e1p s\u1ea1ch s\u1ebd. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m DMD v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1p ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd \u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n (DMD) l\u00e0 g\u00ec? M\u1ed9t ph\u00e9p so s\u00e1nh \u0111\u01a1n gi\u1ea3n<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t \u0111\u1ee3t s\u00f3ng trong s\u00e2n v\u1eadn \u0111\u1ed9ng. N\u1ebfu m\u1ecdi ng\u01b0\u1eddi \u0111\u1ee9ng d\u1eady <em>\u0111\u00fang l\u00fac<\/em> nh\u01b0 nhau, \u0111\u1ee3t s\u00f3ng s\u1ebd lan quanh s\u00e2n m\u1ed9t c\u00e1ch ho\u00e0n h\u1ea3o. Nh\u01b0ng n\u1ebfu c\u00e1c nh\u00f3m ng\u01b0\u1eddi \u0111\u1ee9ng d\u1eady v\u00e0o nh\u1eefng th\u1eddi \u0111i\u1ec3m h\u01a1i kh\u00e1c nhau, \u0111\u1ee3t s\u00f3ng s\u1ebd tr\u1edf n\u00ean m\u1edd, bi\u1ebfn d\u1ea1ng v\u00e0 cu\u1ed1i c\u00f9ng s\u1ee5p \u0111\u1ed5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 \u0111i\u1ec1u x\u1ea3y ra b\u00ean trong m\u1ed9t <strong>c\u00e1p quang \u0111a mode<\/strong>. \u00c1nh s\u00e1ng truy\u1ec1n theo nhi\u1ec1u \u0111\u01b0\u1eddng \u0111i kh\u00e1c nhau, hay c\u00f2n g\u1ecdi l\u00e0 \u201cch\u1ebf \u0111\u1ed9\u201d.\u201d <strong>\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 tr\u1ec5 lan truy\u1ec1n (th\u1eddi gian di chuy\u1ec3n) gi\u1eefa c\u00e1c ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau n\u00e0y.<\/strong> V\u1ec1 l\u00fd t\u01b0\u1edfng, t\u1ea5t c\u1ea3 c\u00e1c xung \u00e1nh s\u00e1ng \u0111\u1ec1u ph\u1ea3i \u0111\u1ebfn \u0111\u00edch \u0111\u1ed3ng th\u1eddi. Tr\u00ean th\u1ef1c t\u1ebf, do c\u00e1c khuy\u1ebft t\u1eadt trong l\u00f5i c\u00e1p quang, m\u1ed9t s\u1ed1 ch\u1ebf \u0111\u1ed9 di chuy\u1ec3n nhanh h\u01a1n nh\u1eefng ch\u1ebf \u0111\u1ed9 kh\u00e1c, khi\u1ebfn xung ban \u0111\u1ea7u s\u1eafc n\u00e9t b\u1ecb gi\u00e3n ra theo th\u1eddi gian.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 gi\u00e3n n\u1edf n\u00e0y l\u00e0 m\u1ed9t d\u1ea1ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/dispersion-in-optical-transceiver-signal-clarity-and-management\/\"><strong>t\u00e1n s\u1eafc ch\u1ebf \u0111\u1ed9 (modal dispersion)<\/strong><\/a>, v\u00e0 DMD l\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee5 th\u1ec3, \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1312\" height=\"1033\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cccba084eadf4fb79cb2d82edd400cad.webp\" alt=\"Differential Mode Delay (DMD)\" class=\"wp-image-4283\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cccba084eadf4fb79cb2d82edd400cad.webp 1312w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cccba084eadf4fb79cb2d82edd400cad-300x236.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cccba084eadf4fb79cb2d82edd400cad-1024x806.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cccba084eadf4fb79cb2d82edd400cad-768x605.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/cccba084eadf4fb79cb2d82edd400cad-15x12.webp 15w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd T\u1ea1i sao DMD l\u1ea1i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 l\u1edbn \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DMD tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n hi\u1ec7u n\u0103ng quan tr\u1ecdng khi t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u t\u0103ng l\u00ean. C\u00e1c xung bi\u1ec3u th\u1ecb c\u00e1c bit d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n ng\u00e0y c\u00e0ng s\u00e1t nhau h\u01a1n \u1edf t\u1ed1c \u0111\u1ed9 cao. N\u1ebfu s\u1ef1 gi\u00e3n n\u1edf xung (do DMD) \u0111\u00e1ng k\u1ec3, n\u0103ng l\u01b0\u1ee3ng t\u1eeb m\u1ed9t xung s\u1ebd tr\u00e0n sang khe th\u1eddi gian c\u1ee7a xung ti\u1ebfp theo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>Nhi\u1ec5u gi\u1eefa c\u00e1c k\u00fd hi\u1ec7u (ISI)<\/strong>, khi\u1ebfn b\u1ed9 thu r\u1ea5t kh\u00f3 ph\u00e2n bi\u1ec7t gi\u1eefa bit \u20181\u2019 v\u00e0 bit \u20180\u2019. K\u1ebft qu\u1ea3? T\u1ef7 l\u1ec7 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\"><strong>T\u1ef7 l\u1ec7 L\u1ed7i Bit (BER)<\/strong><\/a>, t\u0103ng cao, k\u1ebft n\u1ed1i b\u1ea5t \u1ed5n v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 s\u1ef1 c\u1ed1 m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng s\u1eed d\u1ee5ng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/overview-of-vcsel\/\"><strong>Laser ph\u00e1t x\u1ea1 b\u1ec1 m\u1eb7t h\u1ed1c \u0111\u1ee9ng (VCSEL)<\/strong><\/a>, ngu\u1ed3n s\u00e1ng ti\u00eau chu\u1ea9n cho c\u00e1c k\u1ebft n\u1ed1i c\u00e1p quang \u0111a mode t\u1ed1c \u0111\u1ed9 cao. Kh\u00e1c v\u1edbi LED\u2014ph\u00e1t \u00e1nh s\u00e1ng ph\u1ee7 \u0111\u1ea7y l\u00f5i c\u00e1p quang\u2014laser ch\u1ec9 chi\u1ebfu m\u1ed9t \u0111i\u1ec3m nh\u1ecf, t\u1eadp trung. \u0110i\u1ec3m n\u00e0y ch\u1ec9 k\u00edch th\u00edch m\u1ed9t t\u1eadp h\u1ee3p h\u1ea1n ch\u1ebf c\u00e1c ch\u1ebf \u0111\u1ed9, khi\u1ebfn k\u1ebft n\u1ed1i c\u1ef1c k\u1ef3 nh\u1ea1y c\u1ea3m v\u1edbi m\u00e9o d\u1ea1ng do DMD g\u00e2y ra.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd \u0110\u1ed1i ph\u00f3 v\u1edbi DMD: S\u1ef1 n\u1ed5i l\u00ean c\u1ee7a c\u00e1p quang v\u00e0 thi\u1ebft b\u1ecb quang \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3i ph\u00e1p c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p cho th\u00e1ch th\u1ee9c n\u00e0y g\u1ed3m hai ph\u1ea7n:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>C\u00e1p quang \u0111a mode \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a DMD (OM3\/OM4\/OM5):<\/strong> C\u00e1p quang hi\u1ec7n \u0111\u1ea1i \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt DMD nghi\u00eam ng\u1eb7t. Lo\u1ea1i c\u00e1p quang \u201c\u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho laser\u201d n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m gi\u1ea3m thi\u1ec3u s\u1ef1 ch\u00eanh l\u1ec7ch \u0111\u1ed9 tr\u1ec5 gi\u1eefa c\u00e1c ch\u1ebf \u0111\u1ed9, \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u r\u00f5 r\u00e0ng h\u01a1n \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 10G, 40G v\u00e0 100G.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>B\u1ed9 thu ph\u00e1t quang \u0111\u01b0\u1ee3c ki\u1ec3m tra DMD v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n:<\/strong> Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 thu ph\u00e1t \u0111\u1ec1u gi\u1ed1ng nhau. C\u00e1c m\u00f4-\u0111un ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 ki\u1ec3m tra \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0103n \u00fd v\u1edbi c\u00e1p quang \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a DMD. \u0110\u00e2y l\u00e0 l\u00fac vi\u1ec7c l\u1ef1a ch\u1ecdn nh\u00e0 cung c\u1ea5p c\u1ee7a b\u1ea1n tr\u1edf n\u00ean then ch\u1ed1t.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd LINK-PP \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t ho\u00e0n h\u1ea3o trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u1ea1y c\u1ea3m v\u1edbi DMD nh\u01b0 th\u1ebf n\u00e0o<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1i <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.link-pp.com\/\"><strong>LINK-PP<\/strong><\/a>, ch\u00fang t\u00f4i thi\u1ebft k\u1ebf c\u00e1c b\u1ed9 thu ph\u00e1t quang c\u1ee7a m\u00ecnh kh\u00f4ng ch\u1ec9 \u0111\u00e1p \u1ee9ng m\u00e0 c\u00f2n v\u01b0\u1ee3t qu\u00e1 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh, ch\u1ee7 \u0111\u1ed9ng ph\u00f2ng tr\u00e1nh c\u00e1c th\u00e1ch th\u1ee9c nh\u01b0 \u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4-\u0111un c\u1ee7a ch\u00fang t\u00f4i tr\u1ea3i qua quy tr\u00ecnh ki\u1ec3m tra nghi\u00eam ng\u1eb7t nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t <strong>ch\u1ebf \u0111\u1ed9 t\u1ed1i \u01b0u<\/strong> and <strong>t\u1ef7 l\u1ec7 l\u1ed7i bit th\u1ea5p (BER)<\/strong> ngay c\u1ea3 \u1edf gi\u1edbi h\u1ea1n c\u1ef1c \u0111\u1ea1i c\u1ee7a kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh. Ch\u00fang t\u00f4i \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y nh\u1edd ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a laser v\u00e0 c\u00e1c thu\u1eadt to\u00e1n x\u1eed l\u00fd t\u00edn hi\u1ec7u ti\u00ean ti\u1ebfn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5, m\u00f4-\u0111un <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/475415.htm\"><strong>SFP-10G-SR<br><\/strong><\/a> and <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473115.htm\"><strong>C\u00e1c b\u1ed9 thu ph\u00e1t<\/strong><\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u1ec9 m\u1ec9 nh\u1eb1m chi\u1ebfu \u00e1nh s\u00e1ng theo c\u00e1ch gi\u1ea3m thi\u1ec3u vi\u1ec7c k\u00edch th\u00edch c\u00e1c nh\u00f3m ch\u1ebf \u0111\u1ed9 g\u00e2y h\u1ea1i l\u00e0m gia t\u0103ng DMD. K\u1ebft qu\u1ea3 l\u00e0 t\u00edn hi\u1ec7u r\u00f5 r\u00e0ng h\u01a1n, v\u00f9ng <strong>ng\u00e2n s\u00e1ch c\u00f4ng su\u1ea5t quang<\/strong>, r\u1ed9ng h\u01a1n v\u00e0 k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh h\u01a1n cho c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng trung t\u00e2m d\u1eef li\u1ec7u quan tr\u1ecdng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh c\u1ee7a b\u1ed9 thu ph\u00e1t tu\u00e2n th\u1ee7 DMD:<\/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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>B\u1ed9 thu ph\u00e1t ti\u00eau chu\u1ea9n<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>B\u1ed9 thu ph\u00e1t \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a DMD c\u1ee7a LINK-PP<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>L\u1ee3i \u00edch<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>H\u1ed3 s\u01a1 chi\u1ebfu laser<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng ki\u1ec3m so\u00e1t, c\u00f3 th\u1ec3 chi\u1ebfu qu\u00e1 m\u1ee9c v\u00e0o l\u00f5i c\u00e1p quang<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c, chi\u1ebfu t\u1eeb t\u00e2m<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1ea3m thi\u1ec3u vi\u1ec7c k\u00edch th\u00edch c\u00e1c ch\u1ebf \u0111\u1ed9 nh\u1ea1y c\u1ea3m v\u1edbi \u0111\u1ed9 tr\u1ec5<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ki\u1ec3m tra DMD<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng lu\u00f4n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1ee3c ki\u1ec3m tra nghi\u00eam ng\u1eb7t tr\u00ean c\u00e1p quang g\u00e2y th\u00e1ch th\u1ee9c v\u1ec1 DMD<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>T\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n \u1edf t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a \u0111\u01b0\u1ee3c ghi nh\u1eadn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh \u1edf 10G, 40G, 100G v\u00e0 400G<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>B\u1ea3o v\u1ec7 kho\u1ea3n \u0111\u1ea7u t\u01b0 m\u1ea1ng c\u1ee7a b\u1ea1n cho t\u01b0\u01a1ng lai<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ph\u1ea1m vi hi\u1ec7u qu\u1ea3<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f3 th\u1ec3 b\u1ecb gi\u1ea3m ph\u1ea1m vi<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea1t \u0111\u01b0\u1ee3c ph\u1ea1m vi t\u1ed1i \u0111a \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh (v\u00ed d\u1ee5: 400 m tr\u00ean OM4)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110em l\u1ea1i t\u00ednh linh ho\u1ea1t trong thi\u1ebft k\u1ebf v\u00e0 d\u1ef1 ph\u00f2ng<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd K\u1ebft lu\u1eadn: \u0110\u1eebng \u0111\u1ec3 DMD l\u00e0m suy y\u1ebfu m\u1ea1ng c\u1ee7a b\u1ea1n<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>\u0110\u1ed9 Tr\u1ec5 Ch\u00eanh L\u1ec7ch Gi\u1eefa C\u00e1c Mode<\/strong> kh\u00f4ng c\u00f2n ch\u1ec9 d\u00e0nh ri\u00eang cho c\u00e1c nh\u00e0 v\u1eadt l\u00fd s\u1ee3i quang. \u0110\u1ed1i v\u1edbi c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 m\u1ea1ng v\u00e0 qu\u1ea3n l\u00fd trung t\u00e2m d\u1eef li\u1ec7u, \u0111\u00e2y l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 then ch\u1ed1t nh\u1eb1m \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c ho\u00e0n v\u1ed1n \u0111\u1ea7u t\u01b0 mong mu\u1ed1n trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro DMD l\u00e0 s\u1eed d\u1ee5ng <strong>s\u1ee3i quang OM4\/OM5 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho laser<\/strong> v\u00e0 h\u1ee3p t\u00e1c v\u1edbi m\u1ed9t <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>b\u1ed9 thu ph\u00e1t quang<\/strong><\/a> nh\u00e0 cung c\u1ea5p \u0111\u1eb7t tr\u1ecdng t\u00e2m v\u00e0o k\u1ef9 thu\u1eadt hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\ud83d\udcdd FAQ<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n (DMD) trong s\u1ee3i quang l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n x\u1ea3y ra khi c\u00e1c xung \u00e1nh s\u00e1ng di chuy\u1ec3n v\u1edbi c\u00e1c t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau b\u00ean trong s\u1ee3i quang. B\u1ea1n nh\u1eadn th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u1edf c\u00e1c lo\u1ea1i s\u1ee3i \u0111a mode. C\u00e1c xung kh\u00f4ng \u0111\u1ebfn c\u00f9ng l\u00fac. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n di chuy\u1ec3n ch\u1eadm h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 d\u1ed1c DMD th\u1ec3 hi\u1ec7n \u0111i\u1ec1u g\u00ec trong ki\u1ec3m tra s\u1ee3i quang?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 d\u1ed1c DMD cho bi\u1ebft m\u1ee9c \u0111\u1ed9 thay \u0111\u1ed5i \u0111\u1ed9 tr\u1ec5 \u0111\u1ed1i v\u1edbi c\u00e1c ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau. B\u1ea1n s\u1eed d\u1ee5ng th\u00f4ng s\u1ed1 n\u00e0y \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng s\u1ee3i quang. N\u1ebfu \u0111\u1ed9 d\u1ed1c DMD th\u1ea5p, s\u1ee3i quang c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 truy\u1ec1n t\u00edn hi\u1ec7u nhanh h\u01a1n v\u00e0 r\u00f5 n\u00e9t h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec khi\u1ebfn s\u1ee3i \u0111a mode l\u00f5i th\u1ee7y tinh d\u1ea1ng b\u1eadc thang tr\u1edf n\u00ean t\u1ed1t h\u01a1n cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ee3i \u0111a mode l\u00f5i th\u1ee7y tinh d\u1ea1ng b\u1eadc thang c\u00f3 h\u00ecnh d\u1ea1ng l\u00f5i \u0111\u1eb7c bi\u1ec7t. H\u00ecnh d\u1ea1ng n\u00e0y t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng \u0111i m\u01b0\u1ee3t m\u00e0 h\u01a1n cho \u00e1nh s\u00e1ng. N\u00f3 gi\u00fap ng\u0103n c\u00e1c xung b\u1ecb lan r\u1ed9ng qu\u00e1 m\u1ee9c. B\u1ea1n c\u00f3 th\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u nhanh h\u01a1n v\u00e0 m\u1eafc \u00edt l\u1ed7i h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n cao c\u00f3 th\u1ec3 g\u00e2y ra nh\u1eefng v\u1ea5n \u0111\u1ec1 g\u00ec trong vi\u1ec5n th\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n cao c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm m\u1ea1ng c\u1ee7a b\u1ea1n. B\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p nhi\u1ec1u l\u1ed7i h\u01a1n v\u00e0 m\u1ea5t k\u1ebft n\u1ed1i. Vi\u1ec5n th\u00f4ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 tr\u1ec5 th\u1ea5p \u0111\u1ec3 duy tr\u00ec t\u00edn hi\u1ec7u m\u1ea1nh v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng b\u01b0\u1edbc n\u00e0o gi\u00fap b\u1ea1n gi\u1ea3m \u0111\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 vi ph\u00e2n?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn s\u1ee3i quang \u00edt mode v\u00e0 l\u1eafp \u0111\u1eb7t m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn. Kh\u00f4ng u\u1ed1n cong s\u1ee3i qu\u00e1 m\u1ee9c v\u00e0 lu\u00f4n gi\u1eef s\u1ee3i s\u1ea1ch s\u1ebd. Ki\u1ec3m tra s\u1ee3i th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 s\u1edbm.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ed9 tr\u1ec5 ch\u1ebf \u0111\u1ed9 kh\u00e1c nhau trong s\u1ee3i quang \u0111a ch\u1ebf \u0111\u1ed9 gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 v\u00e0 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng lan r\u1ed9ng xung, l\u00e0m gi\u1ea3m \u0111\u1ed9 r\u00f5 n\u00e9t c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 hi\u1ec7u su\u1ea5t m\u1ea1ng.<\/p>","protected":false},"author":1,"featured_media":4282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[26],"class_list":["post-4284","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4284","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=4284"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4284\/revisions"}],"predecessor-version":[{"id":11113,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4284\/revisions\/11113"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4282"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}