{"id":5613,"date":"2025-02-27T11:12:00","date_gmt":"2025-02-27T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/basic-knowledge-lan-wdm-2025\/"},"modified":"2026-06-22T09:44:58","modified_gmt":"2026-06-22T09:44:58","slug":"basic-knowledge-lan-wdm-2025","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/basic-knowledge-lan-wdm-2025","title":{"rendered":"T\u00ecm hi\u1ec3u nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 LAN WDM n\u0103m 2025"},"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\/556bc10aaa894f4e8faa70d43f56b417.webp\" alt=\"Understanding the Basics of LAN WDM in 2025\" class=\"wp-image-5611\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/556bc10aaa894f4e8faa70d43f56b417.webp 1312w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/556bc10aaa894f4e8faa70d43f56b417-300x168.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/556bc10aaa894f4e8faa70d43f56b417-1024x574.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/556bc10aaa894f4e8faa70d43f56b417-768x431.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/556bc10aaa894f4e8faa70d43f56b417-18x10.webp 18w\" sizes=\"(max-width: 1312px) 100vw, 1312px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM, hay Ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng cho M\u1ea1ng c\u1ee5c b\u1ed9 (Local Area Network Wavelength Division Multiplexing), l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 chuy\u00ean bi\u1ec7t nh\u1eb1m t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u trong c\u00e1c m\u1ea1ng LAN, \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3. C\u00f4ng ngh\u1ec7 n\u00e0y ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch chia ch\u00f9m \u00e1nh s\u00e1ng th\u00e0nh nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau, cho ph\u00e9p b\u1ea1n g\u1eedi \u0111\u1ed3ng th\u1eddi nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang duy nh\u1ea5t. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y n\u00e2ng cao \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng v\u00e0 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u0103m 2025, nhu c\u1ea7u v\u1ec1 m\u1ea1ng \u0111\u00e3 \u0111\u1ea1t m\u1ee9c ch\u01b0a t\u1eebng c\u00f3. C\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi b\u0103ng th\u00f4ng l\u1edbn v\u00e0 c\u00e1c t\u00e1c v\u1ee5 nh\u1ea1y c\u1ea3m v\u1edbi \u0111\u1ed9 tr\u1ec5 \u0111ang chi\u1ebfm \u01b0u th\u1ebf trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. LAN WDM gi\u1ea3i quy\u1ebft nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y b\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng c\u00e1c ti\u1ebfn b\u1ed9 nh\u01b0 h\u1ec7 th\u1ed1ng DWDM c\u00f3 dung l\u01b0\u1ee3ng cao h\u01a1n v\u00e0 truy\u1ec1n d\u1eabn quang \u0111\u1ed3ng pha. Nh\u1eefng \u0111\u1ed5i m\u1edbi n\u00e0y cho ph\u00e9p \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 400 Gbps v\u00e0 \u0111\u1ea3m b\u1ea3o vi\u1ec7c giao nh\u1eadn d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, hi\u1ec7u qu\u1ea3 tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i.<\/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>Lo\u1ea1i ti\u1ebfn b\u1ed9<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u00f4 t\u1ea3<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>H\u1ec7 th\u1ed1ng DWDM c\u00f3 dung l\u01b0\u1ee3ng cao h\u01a1n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>C\u00f3 kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u \u1edf t\u1ed1c \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 400 Gbps, \u0111\u00e1p \u1ee9ng c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi b\u0103ng th\u00f4ng l\u1edbn.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>T\u00edch h\u1ee3p v\u1edbi truy\u1ec1n d\u1eabn quang \u0111\u1ed3ng pha<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>N\u00e2ng cao hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u n\u0103ng b\u1eb1ng c\u00e1ch cho ph\u00e9p t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao truy\u1ec1n \u0111i tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng LAN WDM, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i trong khi v\u1eabn duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 gi\u1ea3m \u0111\u1ed9 tr\u1ec5 \u2014 t\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 c\u00e1c c\u00f4ng ngh\u1ec7 m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n ghi nh\u1edb<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>LAN WDM g\u1eedi d\u1eef li\u1ec7u b\u1eb1ng nhi\u1ec1u m\u00e0u \u00e1nh s\u00e1ng tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang. \u0110i\u1ec1u n\u00e0y l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 v\u00e0 gi\u1ea3m \u0111\u1ed9 tr\u1ec5.<\/p><\/li><li><p>C\u00f4ng ngh\u1ec7 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng 5G. N\u00f3 cung c\u1ea5p k\u1ebft n\u1ed1i nhanh cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn.<\/p><\/li><li><p>LAN WDM l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u1ec3 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/essential-role-roadm-cloud-networks\/\">c\u1ea3i thi\u1ec7n m\u1ea1ng c\u1ee5c b\u1ed9<\/a>. C\u00f4ng ngh\u1ec7 n\u00e0y ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 v\u00e0 chi ph\u00ed th\u1ea5p h\u01a1n so v\u1edbi DWDM ho\u1eb7c CWDM.<\/p><\/li><li><p>N\u00f3 s\u1eed d\u1ee5ng d\u1ea3i O-band \u0111\u1ec3 truy\u1ec1n <a target=\"_blank\" href=\"http:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/wavelength-selective-switch-roadm\/\">d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng<\/a>. \u0110i\u1ec1u n\u00e0y gi\u00fap duy tr\u00ec c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u m\u1ea1nh v\u00e0 d\u1eef li\u1ec7u l\u01b0u chuy\u1ec3n tr\u01a1n tru.<\/p><\/li><li><p>LAN WDM c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng c\u00f9ng v\u1edbi m\u1ea1ng c\u1ee7a b\u1ea1n. N\u00f3 x\u1eed l\u00fd \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n th\u00eam c\u00e1p quang.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >Ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 LAN WDM<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >LAN WDM l\u00e0 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng cho m\u1ea1ng c\u1ee5c b\u1ed9 (Local Area Network Wavelength Division Multiplexing \u2013 LAN WDM) l\u00e0 m\u1ed9t d\u1ea1ng ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng chuy\u00ean bi\u1ec7t, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u m\u1eadt \u0111\u1ed9 cao tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn. Kh\u00e1c v\u1edbi WDM n\u00f3i chung \u2014 v\u1ed1n h\u1ed7 tr\u1ee3 nhi\u1ec1u lo\u1ea1i \u1ee9ng d\u1ee5ng \u2014 LAN WDM t\u1eadp trung v\u00e0o vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng v\u00e0 m\u1eadt \u0111\u1ed9 k\u00eanh d\u00e0nh ri\u00eang cho m\u1ea1ng c\u1ee5c b\u1ed9. Nh\u1edd \u0111\u00f3, c\u00f4ng ngh\u1ec7 n\u00e0y r\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u, n\u01a1i y\u00eau c\u1ea7u giao ti\u1ebfp hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t.<\/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>\u0110\u1eb7c t\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>b\u01b0\u1edbc s\u00f3ng LAN WDM<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>WDM n\u00f3i chung<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng 800 GHz (t\u1eeb 4,26 nm \u0111\u1ebfn 4,62 nm)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Thay \u0111\u1ed5i (t\u1eeb 0,4 nm \u0111\u1ebfn 20 nm)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>M\u1eadt \u0111\u1ed9 k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho kho\u1ea3ng c\u00e1ch ng\u1eafn<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u1ea1m vi r\u1ed9ng h\u01a1n, bao g\u1ed3m c\u1ea3 CWDM v\u00e0 DWDM<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>\u1ee8ng d\u1ee5ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>M\u1ea1ng c\u1ee5c b\u1ed9<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ee7 lo\u1ea1i \u1ee9ng d\u1ee5ng, bao g\u1ed3m c\u1ea3 truy\u1ec1n th\u00f4ng kho\u1ea3ng c\u00e1ch xa<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao trong khi v\u1eabn duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn. Kh\u1ea3 n\u0103ng x\u1eed l\u00fd l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u d\u00e0y \u0111\u1eb7c khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i c\u1ee7a m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Nguy\u00ean l\u00fd c\u1ed1t l\u00f5i c\u1ee7a k\u1ef9 thu\u1eadt ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ef9 thu\u1eadt ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng cho ph\u00e9p nhi\u1ec1u lu\u1ed3ng d\u1eef li\u1ec7u di chuy\u1ec3n \u0111\u1ed3ng th\u1eddi tr\u00ean m\u1ed9t s\u1ee3i c\u00e1p quang duy nh\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch g\u00e1n cho m\u1ed7i lu\u1ed3ng d\u1eef li\u1ec7u m\u1ed9t b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng ri\u00eang bi\u1ec7t. B\u1ed9 gh\u00e9p k\u00eanh (multiplexer) k\u1ebft h\u1ee3p c\u00e1c b\u01b0\u1edbc s\u00f3ng n\u00e0y t\u1ea1i \u0111\u1ea7u ph\u00e1t, trong khi b\u1ed9 t\u00e1ch k\u00eanh (demultiplexer) t\u00e1ch ch\u00fang ra t\u1ea1i \u0111\u1ea7u thu. Qu\u00e1 tr\u00ecnh n\u00e0y khai th\u00e1c t\u1ed1i \u0111a b\u0103ng th\u00f4ng c\u1ee7a s\u1ee3i c\u00e1p quang, mang l\u1ea1i hi\u1ec7u qu\u1ea3 cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong LAN WDM, nguy\u00ean l\u00fd n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u1edbi kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng nh\u1ecf h\u01a1n, cho ph\u00e9p nhi\u1ec1u k\u00eanh h\u01a1n c\u00f9ng t\u1ed3n t\u1ea1i trong m\u1ed9t ph\u1ed5 gi\u1edbi h\u1ea1n. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y n\u00e2ng cao hi\u1ec7u qu\u1ea3 c\u1ee7a m\u1ea1ng c\u1ee5c b\u1ed9 b\u1eb1ng c\u00e1ch h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u cao h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n th\u00eam s\u1ee3i c\u00e1p quang.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >V\u00ec sao LAN WDM l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi m\u1ea1ng c\u1ee5c b\u1ed9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. Khi c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 doanh nghi\u1ec7p x\u1eed l\u00fd ng\u00e0y c\u00e0ng nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n, nhu c\u1ea7u s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 b\u0103ng th\u00f4ng tr\u1edf n\u00ean c\u1ea5p thi\u1ebft. LAN WDM \u0111\u00e1p \u1ee9ng nhu c\u1ea7u n\u00e0y b\u1eb1ng c\u00e1ch cung c\u1ea5p:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1eadt \u0111\u1ed9 k\u00eanh cao d\u00e0nh cho truy\u1ec1n th\u00f4ng kho\u1ea3ng c\u00e1ch ng\u1eafn.<\/p><\/li><li><p>\u0110\u1ed9 tr\u1ec5 gi\u1ea3m, \u0111\u1ea3m b\u1ea3o vi\u1ec7c giao d\u1eef li\u1ec7u nhanh h\u01a1n.<\/p><\/li><li><p>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u b\u0103ng th\u00f4ng trong t\u01b0\u01a1ng lai.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng LAN WDM, b\u1ea1n c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u n\u0103ng m\u1ea1ng c\u1ee7a m\u00ecnh \u0111\u1ed3ng th\u1eddi chu\u1ea9n b\u1ecb s\u1eb5n s\u00e0ng cho nh\u1eefng th\u00e1ch th\u1ee9c c\u1ee7a th\u1ebf gi\u1edbi l\u1ea5y d\u1eef li\u1ec7u l\u00e0m trung t\u00e2m trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >So s\u00e1nh LAN WDM v\u1edbi c\u00e1c lo\u1ea1i WDM kh\u00e1c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa LAN WDM, DWDM v\u00e0 CWDM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa LAN WDM, DWDM (Ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng d\u00e0y \u0111\u1eb7c \u2013 Dense Wavelength Division Multiplexing) v\u00e0 CWDM (Ph\u00e2n chia theo b\u01b0\u1edbc s\u00f3ng th\u00f4 \u2013 Coarse Wavelength Division Multiplexing) s\u1ebd gi\u00fap b\u1ea1n l\u1ef1a ch\u1ecdn \u0111\u00fang c\u00f4ng ngh\u1ec7 cho m\u1ea1ng c\u1ee7a m\u00ecnh. M\u1ed7i lo\u1ea1i ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch ri\u00eang d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng, m\u1eadt \u0111\u1ed9 k\u00eanh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/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>C\u00f4ng ngh\u1ec7<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch k\u00eanh<br><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>D\u1ea3i b\u01b0\u1edbc s\u00f3ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>CWDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>20 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1eeb 1270 nm \u0111\u1ebfn 1610 nm<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>DWDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1eeb 0,2 nm \u0111\u1ebfn 1,2 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1eeb 1525 nm \u0111\u1ebfn 1610 nm (d\u1ea3i C) v\u00e0 t\u1eeb 1570 nm \u0111\u1ebfn 1610 nm (d\u1ea3i L)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>b\u01b0\u1edbc s\u00f3ng LAN WDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng 0,8 nm (800 GHz)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>D\u1ea3i O-band (t\u1eeb 1260 nm \u0111\u1ebfn 1360 nm)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM t\u1eadp trung v\u00e0o kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng nh\u1ecf h\u01a1n so v\u1edbi CWDM, do \u0111\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u1eadt \u0111\u1ed9 cao tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u. DWDM, v\u1edbi kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng c\u1ef1c k\u1ef3 h\u1eb9p, h\u1ed7 tr\u1ee3 truy\u1ec1n th\u00f4ng kho\u1ea3ng c\u00e1ch xa v\u00e0 s\u1ed1 l\u01b0\u1ee3ng k\u00eanh cao h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, CWDM cung c\u1ea5p gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c m\u1ea1ng \u00edt y\u00eau c\u1ea7u h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng v\u00e0 m\u1eadt \u0111\u1ed9 k\u00eanh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kho\u1ea3ng c\u00e1ch b\u01b0\u1edbc s\u00f3ng v\u00e0 m\u1eadt \u0111\u1ed9 k\u00eanh \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng s\u1ee3i quang c\u1ee7a m\u1ea1ng. LAN WDM \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa CWDM v\u00e0 DWDM b\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1eadt \u0111\u1ed9 k\u00eanh \u1edf m\u1ee9c v\u1eeba ph\u1ea3i v\u1edbi kho\u1ea3ng c\u00e1ch b\u01b0\u1edbc s\u00f3ng nh\u1ecf 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;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>C\u00f4ng ngh\u1ec7<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>M\u1eadt \u0111\u1ed9 k\u00eanh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>25Gbps<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>H\u1ec7 qu\u1ea3 \u0111\u1ed1i v\u1edbi hi\u1ec7u n\u0103ng m\u1ea1ng<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>CWDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>18 k\u00eanh, 20 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 10 Gbps tr\u00ean m\u1ed7i k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Chi ph\u00ed th\u1ea5p h\u01a1n, dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u th\u1ea5p h\u01a1n<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>DWDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 160 k\u00eanh, 0,4 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 100 Gbps tr\u00ean m\u1ed7i k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Dung l\u01b0\u1ee3ng cao h\u01a1n, s\u1eed d\u1ee5ng s\u1ee3i quang hi\u1ec7u qu\u1ea3 h\u01a1n, chi ph\u00ed gi\u1ea3m<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>b\u01b0\u1edbc s\u00f3ng LAN WDM<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4\u20138 k\u00eanh, kho\u1ea3ng 0,8 nm<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 25 Gbps tr\u00ean m\u1ed7i k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho m\u00f4i tr\u01b0\u1eddng kho\u1ea3ng c\u00e1ch ng\u1eafn v\u00e0 m\u1eadt \u0111\u1ed9 cao<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eadt \u0111\u1ed9 k\u00eanh \u1edf m\u1ee9c v\u1eeba ph\u1ea3i c\u1ee7a LAN WDM \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 trong c\u00e1c m\u1ea1ng c\u1ee5c b\u1ed9 (LAN). C\u00f4ng ngh\u1ec7 n\u00e0y tr\u00e1nh \u0111\u01b0\u1ee3c \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a DWDM \u0111\u1ed3ng th\u1eddi v\u01b0\u1ee3t tr\u1ed9i h\u01a1n CWDM v\u1ec1 dung l\u01b0\u1ee3ng v\u00e0 t\u1ed1c \u0111\u1ed9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Chi ph\u00ed, \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi so s\u00e1nh chi ph\u00ed, CWDM l\u00e0 l\u1ef1a ch\u1ecdn r\u1ebb nh\u1ea5t do kho\u1ea3ng c\u00e1ch b\u01b0\u1edbc s\u00f3ng r\u1ed9ng h\u01a1n v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01a1n gi\u1ea3n h\u01a1n. DWDM, d\u00f9 \u0111\u1eaft h\u01a1n, l\u1ea1i mang \u0111\u1ebfn kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng dung l\u01b0\u1ee3ng v\u01b0\u1ee3t tr\u1ed9i v\u00e0 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i. LAN WDM n\u1eb1m \u1edf v\u1ecb tr\u00ed trung gian, cung c\u1ea5p gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c m\u1ea1ng c\u1ee5c b\u1ed9 y\u00eau c\u1ea7u hi\u1ec7u n\u0103ng cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n s\u1ebd th\u1ea5y LAN WDM \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c m\u00f4i tr\u01b0\u1eddng nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng k\u1ebft n\u1ed1i ph\u00eda tr\u01b0\u1edbc (front haul) 5G. S\u1ef1 \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3 khi\u1ebfn c\u00f4ng ngh\u1ec7 n\u00e0y tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n cho nhu c\u1ea7u m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. CWDM ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u1ea1ng nh\u1ecf c\u00f3 ng\u00e2n s\u00e1ch h\u1ea1n ch\u1ebf, trong khi DWDM ph\u00e1t huy t\u1ed1i \u0111a hi\u1ec7u qu\u1ea3 trong c\u00e1c tri\u1ec3n khai quy m\u00f4 l\u1edbn v\u00e0 dung l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>M\u1eb9o:<br><\/strong> H\u00e3y xem x\u00e9t c\u00e1c y\u00eau c\u1ea7u v\u1ec1 kho\u1ea3ng c\u00e1ch, dung l\u01b0\u1ee3ng v\u00e0 ng\u00e2n s\u00e1ch c\u1ee7a m\u1ea1ng khi l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1c c\u00f4ng ngh\u1ec7 WDM n\u00e0y.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" >\u0110\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt c\u1ee7a LAN WDM<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u1ea5u h\u00ecnh k\u00eanh v\u00e0 b\u01b0\u1edbc s\u00f3ng c\u1ed1 \u0111\u1ecbnh<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ec7 th\u1ed1ng LAN WDM d\u1ef1a v\u00e0o c\u00e1c c\u1ea5u h\u00ecnh k\u00eanh c\u1ee5 th\u1ec3 nh\u1eb1m t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c truy\u1ec1n d\u1eabn qua s\u1ee3i quang. C\u00e1c c\u1ea5u h\u00ecnh n\u00e0y x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng k\u00eanh, t\u1ed1c \u0111\u1ed9 v\u00e0 kho\u1ea3ng c\u00e1ch m\u00e0 ch\u00fang c\u00f3 th\u1ec3 ph\u1ee7 s\u00f3ng. C\u00e1c b\u01b0\u1edbc s\u00f3ng c\u1ed1 \u0111\u1ecbnh \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t b\u1eb1ng c\u00e1ch \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n m\u1ea1ng quang h\u1ecdc.<\/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;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p>C\u1ea5u h\u00ecnh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>K\u00eanh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>T\u1ed1c \u0111\u1ed9 (Gbps)<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ti\u00eau chu\u1ea9n<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch (km)<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>4 k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>100 (25 Gbps NRZ) \/ 200 (50 Gbps NRZ) \/ 400 (50 Gbps PAM4)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>100GBASE-LR4 \/ 100GBASE-ER4 \/ 200GBASE-LR4<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1ed1i \u0111a 10 \/ 40<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p>8 k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>8<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>400 (8 \u00d7 50 Gbps)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng \u00e1p d\u1ee5ng<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4ng \u00e1p d\u1ee5ng<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u1ea5u h\u00ecnh n\u00e0y cho ph\u00e9p b\u1ea1n c\u00e2n b\u1eb1ng gi\u1eefa dung l\u01b0\u1ee3ng v\u00e0 kho\u1ea3ng c\u00e1ch d\u1ef1a tr\u00ean nhu c\u1ea7u m\u1ea1ng c\u1ee7a m\u00ecnh. C\u00e1c b\u01b0\u1edbc s\u00f3ng c\u1ed1 \u0111\u1ecbnh gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng b\u1eb1ng c\u00e1ch gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p trong \u0111i\u1ec1u ch\u1ec9nh b\u01b0\u1edbc s\u00f3ng, t\u1eeb \u0111\u00f3 l\u00e0m cho LAN WDM tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u0111\u00e1ng tin c\u1eady cho c\u00e1c \u1ee9ng d\u1ee5ng truy\u1ec1n th\u00f4ng m\u1eadt \u0111\u1ed9 cao.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Tri\u1ec3n khai d\u1ea3i O-band v\u00e0 c\u00e1c l\u1ee3i \u00edch c\u1ee7a n\u00f3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM ch\u1ee7 y\u1ebfu ho\u1ea1t \u0111\u1ed9ng trong d\u1ea3i O-band (1260 nm \u0111\u1ebfn 1360 nm), v\u1ed1n mang l\u1ea1i nh\u1eefng \u01b0u th\u1ebf \u0111\u1ed9c \u0111\u00e1o cho vi\u1ec7c truy\u1ec1n d\u1eabn s\u1ee3i quang. D\u1ea3i t\u1ea7n n\u00e0y l\u00e0m gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc s\u1eafc m\u00e0u \u2014 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m m\u00e9o t\u00edn hi\u1ec7u v\u00e0 gi\u1ea3m dung l\u01b0\u1ee3ng. Nh\u1edd t\u1eadn d\u1ee5ng d\u1ea3i O-band, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u cao h\u01a1n v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p h\u01a1n trong c\u00e1c \u1ee9ng d\u1ee5ng truy\u1ec1n d\u1eabn kho\u1ea3ng c\u00e1ch ng\u1eafn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ea3i O-band c\u00f2n h\u1ed7 tr\u1ee3 tri\u1ec3n khai ti\u1ebft ki\u1ec7m chi ph\u00ed. N\u00f3 s\u1eed d\u1ee5ng s\u1ee3i \u0111\u01a1n mode ti\u00eau chu\u1ea9n v\u00e0 lo\u1ea1i b\u1ecf nhu c\u1ea7u \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt b\u00f9 t\u00e1n s\u1eafc \u0111\u1eaft \u0111\u1ecf. \u0110i\u1ec1u n\u00e0y khi\u1ebfn d\u1ea3i O-band tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng doanh nghi\u1ec7p, n\u01a1i vi\u1ec7c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng hi\u1ec7u qu\u1ea3 l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Note:<\/strong> Kh\u1ea3 n\u0103ng gi\u1ea3m t\u00e1n s\u1eafc s\u1eafc m\u00e0u c\u1ee7a d\u1ea3i O-band khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c h\u1ec7 th\u1ed1ng m\u1ea1ng quang h\u1ecdc hi\u1ec7n \u0111\u1ea1i.<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00e1n s\u1eafc s\u1eafc m\u00e0u v\u00e0 \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e1n s\u1eafc s\u1eafc m\u00e0u x\u1ea3y ra khi c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng kh\u00e1c nhau di chuy\u1ec3n v\u1edbi t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau trong s\u1ee3i quang. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0m gi\u00e3n xung \u0111\u1ea7u ra theo th\u1eddi gian, l\u00e0m gi\u1ea3m b\u0103ng th\u00f4ng v\u00e0 g\u00e2y m\u00e9o t\u00edn hi\u1ec7u. Trong c\u00f4ng ngh\u1ec7 WDM, hi\u1ec7u \u1ee9ng n\u00e0y tr\u1edf n\u00ean r\u00f5 r\u1ec7t h\u01a1n do vi\u1ec7c s\u1eed d\u1ee5ng nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng c\u00f9ng l\u00fac.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 gi\u1ea3m thi\u1ec3u t\u00e1n s\u1eafc s\u1eafc m\u00e0u, b\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 b\u00f9 \u0111\u1ed9 d\u1ed1c, s\u1ee3i quang d\u1ecbch t\u00e1n s\u1eafc ho\u1eb7c s\u1ee3i b\u00f9 t\u00e1n s\u1eafc. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y n\u00e2ng cao \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eabn \u0111\u00e1ng tin c\u1eady. C\u00e1c s\u01a1 \u0111\u1ed3 b\u00f9 tr\u01b0\u1edbc, b\u00f9 sau ho\u1eb7c b\u00f9 \u0111\u1ed1i x\u1ee9ng c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a th\u00eam hi\u1ec7u n\u0103ng t\u00f9y theo y\u00eau c\u1ea7u m\u1ea1ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch x\u1eed l\u00fd t\u00e1n s\u1eafc s\u1eafc m\u00e0u, LAN WDM duy tr\u00ec dung l\u01b0\u1ee3ng cao v\u00e0 \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eabn s\u1ee3i quang hi\u1ec7u qu\u1ea3, ngay c\u1ea3 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng m\u1ea1ng quang h\u1ecdc m\u1eadt \u0111\u1ed9 cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >C\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a LAN WDM trong n\u0103m 2025<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Data Center Interconnects<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong c\u00e1c k\u1ebft n\u1ed1i li\u00ean trung t\u00e2m d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i. C\u00f4ng ngh\u1ec7 n\u00e0y n\u00e2ng cao hi\u1ec7u n\u0103ng b\u1eb1ng c\u00e1ch cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao \u2014 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho k\u1ebft n\u1ed1i \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y. B\u1ea1n c\u00f3 th\u1ec3 tin t\u01b0\u1edfng v\u00e0o c\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u1ec3 gi\u1ea3m \u0111\u1ed9 tr\u1ec5 v\u00e0 \u0111\u1ea3m b\u1ea3o giao ti\u1ebfp li\u1ec1n m\u1ea1ch gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u. V\u1edbi kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 truy\u1ec1n nh\u01b0 <a target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.linkedin.com\/pulse\/what-lan-wdm-lisa-xu--2sknc\">40G, 100G ho\u1eb7c th\u1eadm ch\u00ed cao h\u01a1n<\/a>, LAN WDM cung c\u1ea5p c\u00e1c k\u1ebft n\u1ed1i m\u1ea1ng \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u qu\u1ea3 m\u00e0 c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u \u0111\u00f2i h\u1ecfi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f4ng ngh\u1ec7 n\u00e0y c\u0169ng mang \u0111\u1ebfn m\u1ed9t gi\u1ea3i ph\u00e1p WDM ti\u1ebft ki\u1ec7m chi ph\u00ed \u0111\u1ec3 x\u1eed l\u00fd l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u ng\u00e0y c\u00e0ng t\u0103ng trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u. B\u1eb1ng c\u00e1ch truy\u1ec1n nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng tr\u00ean m\u1ed9t s\u1ee3i quang duy nh\u1ea5t, n\u00f3 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng \u0111\u1ed3ng th\u1eddi duy tr\u00ec \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u. \u0110\u00e2y ch\u00ednh l\u00e0 c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 qu\u1ea3n l\u00fd s\u1ef1 gia t\u0103ng ph\u1ee9c t\u1ea1p trong v\u1eadn h\u00e0nh trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >M\u1ea1ng k\u1ebft n\u1ed1i ph\u00eda tr\u01b0\u1edbc (front haul) 5G<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00e0o n\u0103m 2025, c\u00e1c m\u1ea1ng k\u1ebft n\u1ed1i ph\u00eda tr\u01b0\u1edbc 5G (5G front haul networks) ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o LAN WDM \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 dung l\u01b0\u1ee3ng cao v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p. C\u00f4ng ngh\u1ec7 n\u00e0y cho ph\u00e9p nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng truy\u1ec1n qua m\u1ed9t s\u1ee3i quang duy nh\u1ea5t, t\u1eeb \u0111\u00f3 t\u0103ng \u0111\u00e1ng k\u1ec3 th\u00f4ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng LAN WDM \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh k\u1ebft n\u1ed1i \u0111\u00e1ng tin c\u1eady \u2014 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng 5G ti\u00ean ti\u1ebfn nh\u01b0 th\u1ef1c t\u1ebf t\u0103ng c\u01b0\u1eddng (augmented reality) v\u00e0 xe t\u1ef1 h\u00e0nh (autonomous vehicles).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i \u0111\u1ed9 tr\u1ec5 th\u1ea5p do LAN WDM cung c\u1ea5p h\u1ed7 tr\u1ee3 vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u nhanh ch\u00f3ng c\u1ea7n thi\u1ebft cho c\u00e1c m\u1ea1ng k\u1ebft n\u1ed1i ph\u00eda tr\u01b0\u1edbc 5G. C\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a 5G b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 b\u0103ng th\u00f4ng v\u00e0 duy tr\u00ec c\u00e1c k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh. Nh\u1edd v\u1eady, LAN WDM tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i cho th\u1ebf h\u1ec7 ti\u1ebfp theo c\u1ee7a vi\u1ec5n th\u00f4ng kh\u00f4ng d\u00e2y.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Vai tr\u00f2 trong c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM c\u0169ng h\u1ed7 tr\u1ee3 c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i nh\u01b0 Internet v\u1ea1n v\u1eadt (IoT) v\u00e0 \u0111i\u1ec7n to\u00e1n bi\u00ean (edge computing). Kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i dung l\u01b0\u1ee3ng cao v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p c\u1ee7a n\u00f3 n\u00e2ng cao n\u0103ng l\u1ef1c truy\u1ec1n d\u1eef li\u1ec7u \u2014 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i n\u00e0y. Trong c\u00e1c m\u1ea1ng 5G, LAN WDM cho ph\u00e9p vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u nhanh ch\u00f3ng c\u1ea7n thi\u1ebft cho c\u00e1c thi\u1ebft b\u1ecb IoT v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 h\u00e0nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u1ec3 x\u1eed l\u00fd kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 do c\u00e1c c\u1ea3m bi\u1ebfn IoT v\u00e0 thi\u1ebft b\u1ecb bi\u00ean t\u1ea1o ra. B\u1eb1ng c\u00e1ch \u0111\u1ea3m b\u1ea3o vi\u1ec7c s\u1eed d\u1ee5ng s\u1ee3i quang hi\u1ec7u qu\u1ea3, LAN WDM cung c\u1ea5p kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ea7n thi\u1ebft \u0111\u1ec3 h\u1ed7 tr\u1ee3 s\u1ef1 ph\u00e1t tri\u1ec3n li\u00ean t\u1ee5c c\u1ee7a c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y. Vai tr\u00f2 c\u1ee7a n\u00f3 trong vi\u1ec7c k\u00edch ho\u1ea1t giao ti\u1ebfp li\u1ec1n m\u1ea1ch gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb khi\u1ebfn LAN WDM tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 then ch\u1ed1t th\u00fac \u0111\u1ea9y t\u01b0\u01a1ng lai c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng k\u1ebft n\u1ed1i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >T\u01b0\u01a1ng lai c\u1ee7a LAN WDM trong l\u0129nh v\u1ef1c m\u1ea1ng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u b\u0103ng th\u00f4ng ng\u00e0y c\u00e0ng t\u0103ng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Khi l\u01b0u l\u01b0\u1ee3ng d\u1eef li\u1ec7u ti\u1ebfp t\u1ee5c gia t\u0103ng, b\u1ea1n c\u1ea7n c\u00e1c gi\u1ea3i ph\u00e1p c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng hi\u1ec7u qu\u1ea3. LAN WDM cung c\u1ea5p kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nh\u1eefng y\u00eau c\u1ea7u n\u00e0y. B\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a kho\u1ea3ng c\u00e1ch b\u01b0\u1edbc s\u00f3ng v\u00e0 m\u1eadt \u0111\u1ed9 k\u00eanh, LAN WDM h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n b\u1ed5 sung c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, n\u01a1i nhu c\u1ea7u b\u0103ng th\u00f4ng t\u0103ng nhanh do c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 5G v\u00e0 \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y (cloud computing).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 tin t\u01b0\u1edfng v\u00e0o LAN WDM \u0111\u1ec3 x\u1eed l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a m\u1ea1ng. Kh\u1ea3 n\u0103ng t\u00edch h\u1ee3p nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng v\u00e0o m\u1ed9t s\u1ee3i quang duy nh\u1ea5t c\u1ee7a n\u00f3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng hi\u1ec7u qu\u1ea3. Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng n\u00e0y cho ph\u00e9p b\u1ea1n chu\u1ea9n b\u1ecb s\u1eb5n s\u00e0ng cho t\u01b0\u01a1ng lai c\u1ee7a m\u1ea1ng trong khi v\u1eabn duy tr\u00ec hi\u1ec7u qu\u1ea3 chi ph\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u00edch h\u1ee3p v\u1edbi tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 h\u1ecdc m\u00e1y (machine learning)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 h\u1ecdc m\u00e1y (ML) \u0111ang thay \u0111\u1ed5i c\u00e1ch th\u1ee9c v\u1eadn h\u00e0nh m\u1ea1ng. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y \u0111\u1ec3 n\u00e2ng cao c\u00e1c h\u1ec7 th\u1ed1ng LAN WDM b\u1eb1ng c\u00e1ch t\u1ef1 \u0111\u1ed9ng h\u00f3a qu\u1ea3n l\u00fd m\u1ea1ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t. C\u00e1c thu\u1eadt to\u00e1n AI c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n c\u00e1c m\u1eabu l\u01b0u l\u01b0\u1ee3ng, t\u1eeb \u0111\u00f3 ph\u00e2n b\u1ed5 \u0111\u1ed9ng b\u01b0\u1edbc s\u00f3ng nh\u1eb1m ng\u0103n ng\u1eeba t\u1eafc ngh\u1ebdn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y c\u0169ng c\u1ea3i thi\u1ec7n vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 kh\u00f4i ph\u1ee5c s\u1ef1 c\u1ed1. B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch d\u1eef li\u1ec7u th\u1eddi gian th\u1ef1c, ch\u00fang c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n v\u00e0 \u0111\u1ec1 xu\u1ea5t c\u00e1c h\u00e0nh \u0111\u1ed9ng kh\u1eafc ph\u1ee5c. Vi\u1ec7c t\u00edch h\u1ee3p n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ea1ng c\u1ee7a b\u1ea1n lu\u00f4n \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3, ngay c\u1ea3 khi nhu c\u1ea7u d\u1eef li\u1ec7u ng\u00e0y c\u00e0ng t\u0103ng. AI v\u00e0 ML l\u00e0m cho LAN WDM th\u00f4ng minh h\u01a1n, gi\u00fap b\u1ea1n qu\u1ea3n l\u00fd c\u00e1c m\u1ea1ng ph\u1ee9c t\u1ea1p m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c \u0111\u1ed5i m\u1edbi v\u00e0 th\u00e1ch th\u1ee9c s\u1eafp t\u1edbi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u0111\u1ed5i m\u1edbi g\u1ea7n \u0111\u00e2y trong l\u0129nh v\u1ef1c LAN WDM bao g\u1ed3m vi\u1ec7c ph\u00e1t tri\u1ec3n b\u1ed9 thu ph\u00e1t quang 8 k\u00eanh (8-channel optical transceivers). C\u00e1c thi\u1ebft b\u1ecb n\u00e0y t\u00edch h\u1ee3p t\u00e1m k\u00eanh v\u00e0o m\u1ed9t \u0111\u01a1n v\u1ecb duy nh\u1ea5t, t\u1eeb \u0111\u00f3 n\u00e2ng cao \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u. \u0110\u1ed3ng th\u1eddi, ch\u00fang c\u0169ng gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p trong s\u1ea3n xu\u1ea5t v\u00e0 chi ph\u00ed, \u0111\u00e1nh d\u1ea5u m\u1ed9t b\u01b0\u1edbc ti\u1ebfn l\u1edbn trong c\u00f4ng ngh\u1ec7 quang h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tuy nhi\u00ean, v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i nh\u1eefng th\u00e1ch th\u1ee9c. Vi\u1ec7c thi\u1ebfu ti\u00eau chu\u1ea9n ng\u00e0nh khi\u1ebfn vi\u1ec7c \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa thi\u1ebft b\u1ecb c\u1ee7a c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c nhau tr\u1edf n\u00ean kh\u00f3 kh\u0103n. T\u1ed1i \u01b0u h\u00f3a chi ph\u00ed v\u00e0 gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng c\u0169ng l\u00e0 nh\u1eefng r\u00e0o c\u1ea3n then ch\u1ed1t. \u0110\u1ec3 v\u01b0\u1ee3t qua nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y, b\u1ea1n c\u1ea7n t\u1eadp trung v\u00e0o h\u1ee3p t\u00e1c v\u00e0 chu\u1ea9n h\u00f3a trong to\u00e0n ng\u00e0nh.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>M\u1eb9o:<br><\/strong> Vi\u1ec7c c\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean c\u00e1c ti\u1ebfn b\u1ed9 n\u00e0y s\u1ebd gi\u00fap b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh m\u1ea1ng sao cho ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u t\u01b0\u01a1ng lai \u0111\u1ed3ng th\u1eddi gi\u1ea3i quy\u1ebft c\u00e1c tr\u1edf ng\u1ea1i ti\u1ec1m \u1ea9n.<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM mang l\u1ea1i nh\u1eefng l\u1ee3i th\u1ebf \u0111\u1ed9c \u0111\u00e1o khi\u1ebfn n\u00f3 tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 thi\u1ebfu trong m\u1ea1ng hi\u1ec7n \u0111\u1ea1i. B\u1eb1ng c\u00e1ch cho ph\u00e9p nhi\u1ec1u t\u00edn hi\u1ec7u quang truy\u1ec1n qua m\u1ed9t s\u1ee3i quang duy nh\u1ea5t, LAN WDM t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng v\u00e0 \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao, hi\u1ec7u qu\u1ea3. Hi\u1ec7u qu\u1ea3 v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng n\u00e0y khi\u1ebfn LAN WDM \u0111\u1eb7c bi\u1ec7t hi\u1ec7u qu\u1ea3 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng ng\u1eafn kho\u1ea3ng c\u00e1ch v\u00e0 m\u1eadt \u0111\u1ed9 cao nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u. B\u1ea1n c\u00f3 th\u1ec3 tin t\u01b0\u1edfng v\u00e0o LAN WDM \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng c\u1ee7a c\u00e1c m\u1ea1ng 5G, n\u01a1i k\u1ebft n\u1ed1i \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 dung l\u01b0\u1ee3ng cao l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho c\u00e1c \u1ee9ng d\u1ee5ng ti\u00ean ti\u1ebfn nh\u01b0 IoT v\u00e0 xe t\u1ef1 h\u00e0nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u00ecn v\u1ec1 t\u01b0\u01a1ng lai, LAN WDM s\u1eb5n s\u00e0ng th\u00fac \u0111\u1ea9y c\u00e1c \u0111\u1ed5i m\u1edbi trong l\u0129nh v\u1ef1c truy\u1ec1n th\u00f4ng quang h\u1ecdc. Kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 truy\u1ec1n d\u1eabn t\u1ed1c \u0111\u1ed9 cao v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p c\u1ee7a n\u00f3 ho\u00e0n to\u00e0n ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng \u0111\u1ed1i v\u1edbi c\u00f4ng ngh\u1ec7 \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y v\u00e0 d\u1eef li\u1ec7u l\u1edbn (big data). M\u1eb7c d\u00f9 nh\u1eefng th\u00e1ch th\u1ee9c nh\u01b0 chi ph\u00ed v\u00e0 chu\u1ea9n h\u00f3a v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i, ti\u1ec1m n\u0103ng c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y trong vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i c\u00e1c k\u1ebft n\u1ed1i n\u1ed9i b\u1ed9 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng m\u1eadt \u0111\u1ed9 cao kh\u00e1c l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 ph\u1ee7 nh\u1eadn. Khi ng\u00e0nh c\u00f4ng nghi\u1ec7p ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, LAN WDM s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u1ecbnh h\u00ecnh t\u01b0\u01a1ng lai c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >\u0110i\u1ec1u g\u00ec l\u00e0m cho LAN WDM kh\u00e1c bi\u1ec7t so v\u1edbi DWDM v\u00e0 CWDM?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM s\u1eed d\u1ee5ng kho\u1ea3ng c\u00e1ch b\u01b0\u1edbc s\u00f3ng nh\u1ecf h\u01a1n so v\u1edbi CWDM v\u00e0 ho\u1ea1t \u0111\u1ed9ng tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn h\u01a1n so v\u1edbi DWDM. N\u00f3 c\u00e2n b\u1eb1ng gi\u1eefa chi ph\u00ed v\u00e0 hi\u1ec7u n\u0103ng, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u1ea1ng c\u1ee5c b\u1ed9 nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u. DWDM h\u1ed7 tr\u1ee3 truy\u1ec1n th\u00f4ng \u1edf kho\u1ea3ng c\u00e1ch xa, trong khi CWDM cung c\u1ea5p m\u1ed9t gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c m\u1ea1ng \u00edt y\u00eau c\u1ea7u h\u01a1n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >T\u1ea1i sao LAN WDM s\u1eed d\u1ee5ng d\u1ea3i O-band \u0111\u1ec3 truy\u1ec1n d\u1eabn?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ea3i O-band l\u00e0m gi\u1ea3m thi\u1ec3u s\u1ef1 ph\u00e2n t\u00e1n s\u1eafc m\u00e0u, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf n\u00ean ho\u00e0n h\u1ea3o cho truy\u1ec1n th\u00f4ng kho\u1ea3ng c\u00e1ch ng\u1eafn. Ngo\u00e0i ra, n\u00f3 c\u00f2n gi\u00fap gi\u1ea3m chi ph\u00ed b\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf nhu c\u1ea7u \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt b\u00f9 ph\u00e2n t\u00e1n \u0111\u1eaft \u0111\u1ecf, \u0111\u1ea3m b\u1ea3o vi\u1ec7c s\u1eed d\u1ee5ng s\u1ee3i quang hi\u1ec7u qu\u1ea3 trong c\u00e1c m\u1ea1ng c\u1ee5c b\u1ed9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >H\u1ec7 th\u1ed1ng LAN-WDM 4 k\u00eanh ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 th\u1ed1ng LAN-WDM 4 k\u00eanh truy\u1ec1n d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ed1n b\u01b0\u1edbc s\u00f3ng c\u1ed1 \u0111\u1ecbnh. M\u1ed7i k\u00eanh ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 cao, v\u00ed d\u1ee5 nh\u01b0 25 Gbps ho\u1eb7c 50 Gbps. C\u1ea5u h\u00ecnh n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3 tr\u00ean kho\u1ea3ng c\u00e1ch ng\u1eafn, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f3 m\u1eadt \u0111\u1ed9 cao nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >Li\u1ec7u LAN WDM c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u b\u0103ng th\u00f4ng trong t\u01b0\u01a1ng lai kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00fang v\u1eady, LAN WDM m\u1edf r\u1ed9ng quy m\u00f4 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 b\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a <a target=\"_blank\" href=\"http:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/wavelength-selective-switch-roadm\/\">kho\u1ea3ng c\u00e1ch b\u01b0\u1edbc s\u00f3ng<\/a> v\u00e0 m\u1eadt \u0111\u1ed9 k\u00eanh. N\u00f3 h\u1ed7 tr\u1ee3 t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u cao h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n b\u1ed5 sung c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang. Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p \u201cch\u1ed1ng l\u1ed7i th\u1eddi\u201d cho nhu c\u1ea7u b\u0103ng th\u00f4ng ng\u00e0y c\u00e0ng t\u0103ng trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >LAN WDM c\u00f3 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed cho c\u00e1c m\u1ea1ng c\u1ee5c b\u1ed9 kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LAN WDM mang l\u1ea1i m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed cho c\u00e1c m\u1ea1ng c\u1ee5c b\u1ed9 hi\u1ec7u n\u0103ng cao. N\u00f3 tr\u00e1nh \u0111\u01b0\u1ee3c \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a DWDM \u0111\u1ed3ng th\u1eddi v\u01b0\u1ee3t tr\u1ed9i h\u01a1n CWDM v\u1ec1 dung l\u01b0\u1ee3ng v\u00e0 t\u1ed1c \u0111\u1ed9. Kh\u1ea3 n\u0103ng t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng s\u1ee3i quang khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn th\u1ef1c ti\u1ec5n cho c\u00e1c m\u00f4i tr\u01b0\u1eddng nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng k\u1ebft n\u1ed1i ph\u00eda tr\u01b0\u1edbc (front haul) 5G.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Xem Th\u00eam<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/understanding-50g-pon-in-2025\/\">Kh\u00e1m ph\u00e1 T\u01b0\u01a1ng lai C\u1ee7a C\u00f4ng Ngh\u1ec7 50G PON \u0110\u1ebfn N\u0103m 2025<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/essential-role-roadm-cloud-networks\/\">T\u1ea7m Quan Tr\u1ecdng C\u1ee7a ROADM Trong C\u00e1c Gi\u1ea3i Ph\u00e1p M\u1ea1ng \u0110i\u1ec7n To\u00e1n \u0110\u00e1m M\u00e2y Hi\u1ec7n \u0110\u1ea1i<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/wavelength-selective-switch-roadm\/\">H\u01b0\u1edbng D\u1eabn V\u1ec1 C\u00e1c B\u1ed9 Chuy\u1ec3n M\u1ea1ch L\u1ef1a Ch\u1ecdn B\u01b0\u1edbc S\u00f3ng Trong ROADM<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/understanding-10g-pon-how-it-works\/\">Gi\u1ea3i Th\u00edch V\u1ec1 10G PON: Ch\u1ee9c N\u0103ng V\u00e0 C\u00e1c \u0110\u1eb7c \u0110i\u1ec3m Ch\u00ednh \u0110\u01b0\u1ee3c Ti\u1ebft L\u1ed9<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/optical-encryption-future-data-security\/\">T\u00e1c \u0110\u1ed9ng C\u1ee7a M\u00e3 H\u00f3a Quang H\u1ecdc \u0110\u1ed1i V\u1edbi T\u01b0\u01a1ng Lai B\u1ea3o M\u1eadt D\u1eef Li\u1ec7u<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Ti\u1ebfp c\u1eadn ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng v\u1ec1 LAN WDM \u2014 c\u00f4ng ngh\u1ec7 t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u trong m\u1ea1ng LAN v\u1edbi k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao, \u0111\u1ed9 tr\u1ec5 th\u1ea5p d\u00e0nh cho c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i n\u0103m 2025.<\/p>","protected":false},"author":1,"featured_media":5611,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5613","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5613","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=5613"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5613\/revisions"}],"predecessor-version":[{"id":11546,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5613\/revisions\/11546"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5611"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}