{"id":4294,"date":"2025-06-30T00:00:00","date_gmt":"2025-06-30T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-dwdm-explaining-dense-wavelength-division-multiplexing\/"},"modified":"2026-06-22T09:23:27","modified_gmt":"2026-06-22T09:23:27","slug":"what-is-dwdm-explaining-dense-wavelength-division-multiplexing","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-dwdm-explaining-dense-wavelength-division-multiplexing","title":{"rendered":"DWDM l\u00e0 g\u00ec? Gi\u1ea3i Th\u00edch V\u1ec1 \u0110a H\u1ee3p Ph\u00e2n Chia B\u01b0\u1edbc S\u00f3ng M\u1eadt \u0110\u1ed9 Cao"},"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\/51e60b194ad340d789910336233a7b38.webp\" alt=\"What is DWDM Explaining Dense Wavelength Division Multiplexing\" class=\"wp-image-4292\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e60b194ad340d789910336233a7b38.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e60b194ad340d789910336233a7b38-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e60b194ad340d789910336233a7b38-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e60b194ad340d789910336233a7b38-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/51e60b194ad340d789910336233a7b38-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">Trong th\u1ebf gi\u1edbi l\u1ea5y d\u1eef li\u1ec7u l\u00e0m trung t\u00e2m ng\u00e0y nay, \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y b\u1edfi \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y, c\u00e1c \u00f4ng l\u1edbn ph\u00e1t tr\u1ef1c tuy\u1ebfn, Internet v\u1ea1n v\u1eadt (IoT) v\u00e0 5G, nhu c\u1ea7u v\u1ec1 b\u0103ng th\u00f4ng m\u1ea1ng \u0111ang b\u00f9ng n\u1ed5. C\u00e1c k\u1ebft n\u1ed1i s\u1ee3i quang truy\u1ec1n th\u1ed1ng, ch\u1ec9 truy\u1ec1n m\u1ed9t k\u00eanh d\u1eef li\u1ec7u tr\u00ean m\u1ed7i c\u1eb7p s\u1ee3i, \u0111\u01a1n gi\u1ea3n l\u00e0 kh\u00f4ng th\u1ec3 theo k\u1ecbp. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac <\/span><span class=\"qc-p1-tag\"><strong>\u0110a b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (DWDM)<\/strong><\/span><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\"> <em>DWDM<\/em> n\u1ed5i l\u00ean nh\u01b0 c\u00f4ng ngh\u1ec7 n\u1ec1n t\u1ea3ng \u0111\u1ec3 m\u1edf r\u1ed9ng m\u1ea1ng quang m\u1ed9t c\u00e1ch l\u0169y th\u1eeba. Nh\u01b0ng DWDM th\u1ef1c ch\u1ea5t l\u00e0 g\u00ec?<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>C\u00e1c h\u1ec7 th\u1ed1ng DWDM c\u00f3 th\u1ec3 g\u1eedi 16, 32, 40 ho\u1eb7c th\u1eadm ch\u00ed h\u01a1n 80 b\u01b0\u1edbc s\u00f3ng tr\u00ean m\u1ed9t s\u1ee3i quang.<\/p><\/li><li><p>M\u1ed9t h\u1ec7 th\u1ed1ng \u1edf t\u1ed1c \u0111\u1ed9 100 Gbps tr\u00ean 80 b\u01b0\u1edbc s\u00f3ng c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1ed5ng c\u00f4ng su\u1ea5t 8 Tbps.<\/p><\/li><li><p>DWDM gi\u00fap c\u00e1c c\u00f4ng ty nh\u01b0 Google li\u00ean k\u1ebft c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u b\u1eb1ng c\u00e1c k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao. N\u00f3 c\u0169ng \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng t\u1eeb \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y, 5G v\u00e0 ph\u00e1t tr\u1ef1c tuy\u1ebfn.<\/p><\/li><li><p>B\u1eb1ng c\u00e1ch th\u00eam nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng h\u01a1n, DWDM cho ph\u00e9p m\u1ea1ng m\u1edf r\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1p m\u1edbi. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m chi ph\u00ed v\u00e0 t\u0103ng t\u00ednh linh ho\u1ea1t.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 \u0110i\u1ec3m n\u1ed5i b\u1eadt<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>DWDM g\u1eedi nhi\u1ec1u t\u00edn hi\u1ec7u d\u1eef li\u1ec7u qua m\u1ed9t s\u1ee3i quang. N\u00f3 s\u1eed d\u1ee5ng c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng kh\u00e1c nhau cho t\u1eebng t\u00edn hi\u1ec7u. Nh\u1edd \u0111\u00f3, m\u1ea1ng c\u00f3 th\u1ec3 ch\u1ee9a nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1p m\u1edbi.<\/p><\/li><li><p>C\u00e1c th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a DWDM g\u1ed3m b\u1ed9 ph\u00e1t, b\u1ed9 gh\u00e9p k\u00eanh, <a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/erbium-doped-fiber-amplifier-optical-networks\/\"><strong>b\u1ed9 khu\u1ebfch \u0111\u1ea1i<\/strong><\/a>, v\u00e0 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u (transponder). C\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 gi\u1eef cho t\u00edn hi\u1ec7u m\u1ea1nh v\u00e0 r\u00f5 r\u00e0ng. Ch\u00fang c\u0169ng gi\u00fap m\u1ea1ng d\u1ec5 d\u00e0ng n\u00e2ng c\u1ea5p trong t\u01b0\u01a1ng lai.<\/p><\/li><li><p><strong>DWDM cho ph\u00e9p d\u1eef li\u1ec7u di chuy\u1ec3n nhanh v\u00e0 xa<\/strong>. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea1ng quy m\u00f4 l\u1edbn, trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y. N\u00f3 c\u00f2n gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 kh\u00f4ng gian.<\/p><\/li><li><p>DWDM \u0111\u1eb7t c\u00e1c k\u00eanh g\u1ea7n nhau h\u01a1n so v\u1edbi CWDM. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i t\u1ed1c \u0111\u1ed9 cao h\u01a1n v\u00e0 t\u1ea7m xa h\u01a1n. Tuy nhi\u00ean, chi ph\u00ed cao h\u01a1n v\u00e0 vi\u1ec7c tri\u1ec3n khai ph\u1ee9c t\u1ea1p h\u01a1n.<\/p><\/li><li><p>C\u00e1c m\u1ea1ng DWDM c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng b\u1eb1ng c\u00e1ch th\u00eam c\u00e1c k\u00eanh m\u1edbi. Ch\u00fang s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 th\u00f4ng minh nh\u01b0 tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a. \u0110i\u1ec1u n\u00e0y gi\u00fap ch\u00fang s\u1eb5n s\u00e0ng cho c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi nh\u01b0 5G v\u00e0 IoT.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Hi\u1ec3u kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i: \u00c1nh s\u00e1ng tr\u00ean nhi\u1ec1u l\u00e0n \u0111\u01b0\u1eddng<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"585\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca12ff48b67247d1a3ce18cb8a65c5b5.webp\" alt=\"DWDM\" class=\"wp-image-4293\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca12ff48b67247d1a3ce18cb8a65c5b5.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca12ff48b67247d1a3ce18cb8a65c5b5-300x146.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca12ff48b67247d1a3ce18cb8a65c5b5-1024x499.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca12ff48b67247d1a3ce18cb8a65c5b5-768x374.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ca12ff48b67247d1a3ce18cb8a65c5b5-18x9.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t xa l\u1ed9 nhi\u1ec1u l\u00e0n so v\u1edbi m\u1ed9t con \u0111\u01b0\u1eddng ch\u1ec9 c\u00f3 m\u1ed9t l\u00e0n. DWDM v\u1eadn h\u00e0nh theo nguy\u00ean l\u00fd t\u01b0\u01a1ng t\u1ef1 \u0111\u1ed1i v\u1edbi s\u1ee3i quang. N\u00f3 cho ph\u00e9p nhi\u1ec1u <strong>t\u00edn hi\u1ec7u mang quang<\/strong>, m\u1ed7i t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c mang tr\u00ean m\u1ed9t b\u01b0\u1edbc s\u00f3ng (ho\u1eb7c m\u00e0u) laser ri\u00eang bi\u1ec7t v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1ecbnh v\u1ecb ch\u00ednh x\u00e1c, <em>\u0111\u1ed3ng th\u1eddi<\/em> truy\u1ec1n qua m\u1ed9t s\u1ee3i quang duy nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb \u201cDense\u201d (M\u1eadt) trong DWDM \u0111\u1ec1 c\u1eadp \u0111\u1ebfn kho\u1ea3ng c\u00e1ch r\u1ea5t s\u00e1t gi\u1eefa c\u00e1c b\u01b0\u1edbc s\u00f3ng n\u00e0y. Kh\u00e1c v\u1edbi ng\u01b0\u1eddi anh em h\u1ecd c\u1ee7a n\u00f3 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-cwdm-understanding-coarse-wavelength-division-multiplexing\/\"><strong>CWDM (\u0110a ph\u00e2n b\u01b0\u1edbc s\u00f3ng th\u00f4)<br><\/strong><\/a>, s\u1eed d\u1ee5ng kho\u1ea3ng c\u00e1ch k\u00eanh r\u1ed9ng h\u01a1n (th\u01b0\u1eddng l\u00e0 20nm), trong khi DWDM s\u1eed d\u1ee5ng kho\u1ea3ng c\u00e1ch k\u00eanh h\u1eb9p h\u01a1n nhi\u1ec1u, th\u01b0\u1eddng l\u00e0 0,8nm, 0,4nm (50GHz) ho\u1eb7c th\u1eadm ch\u00ed 0,2nm (25GHz) trong c\u00e1c h\u1ec7 th\u1ed1ng ti\u00ean ti\u1ebfn. M\u1eadt \u0111\u1ed9 n\u00e0y cho ph\u00e9p t\u00edch h\u1ee3p h\u00e0ng ch\u1ee5c, th\u1eadm ch\u00ed h\u00e0ng tr\u0103m k\u00eanh d\u1eef li\u1ec7u ri\u00eang l\u1ebb l\u00ean m\u1ed9t c\u1eb7p s\u1ee3i quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 C\u00e1c th\u00e0nh ph\u1ea7n DWDM<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ec7 th\u1ed1ng DWDM d\u1ef1a v\u00e0o n\u0103m th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i \u0111\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eef li\u1ec7u dung l\u01b0\u1ee3ng cao tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>B\u1ed9 ph\u00e1t\/b\u1ed9 thu<\/strong> \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u v\u00e0 s\u1eeda l\u1ed7i.<\/p><\/li><li><p><strong>B\u1ed9 gh\u00e9p k\u00eanh\/b\u1ed9 t\u00e1ch k\u00eanh (MUX\/DEMUX)<\/strong> \u0111\u1ec3 t\u1eadp h\u1ee3p v\u00e0 t\u00e1ch c\u00e1c k\u00eanh \u0111a k\u00eanh.<\/p><\/li><li><p><strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i quang<\/strong> \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u tr\u00ean kho\u1ea3ng c\u00e1ch l\u1edbn.<\/p><\/li><li><p><strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u01b0\u1edbc s\u00f3ng (Transponders)<\/strong> \u0111\u1ec3 th\u00edch \u1ee9ng b\u01b0\u1edbc s\u00f3ng v\u00e0 gi\u00e1m s\u00e1t h\u1ec7 th\u1ed1ng.<\/p><\/li><li><p><strong>B\u1ed9 gh\u00e9p\/t\u00e1ch k\u00eanh quang c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh (OADMs)<\/strong> \u0111\u1ec3 m\u1edf r\u1ed9ng v\u00e0 qu\u1ea3n l\u00fd m\u1ea1ng linh ho\u1ea1t.<\/p><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" >\ud83d\udd39 <strong>B\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vai tr\u00f2<\/strong>: C\u00e1c th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i cho ph\u00e9p truy\u1ec1n v\u00e0 nh\u1eadn d\u1eef li\u1ec7u trong c\u00e1c h\u1ec7 th\u1ed1ng DWDM. <strong>C\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>B\u1ed9 ph\u00e1t<\/strong>: Chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00e0nh c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng ch\u00ednh x\u00e1c b\u1eb1ng laser.<\/p><\/li><li><p><strong>B\u1ed9 thu<\/strong>: Thu nh\u1eadn t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng v\u00e0 chuy\u1ec3n \u0111\u1ed5i l\u1ea1i th\u00e0nh d\u1eef li\u1ec7u \u0111i\u1ec7n.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c th\u00f4ng s\u1ed1 hi\u1ec7u su\u1ea5t then ch\u1ed1t<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p><strong>Ch\u1ec9 s\u1ed1<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>Vai tr\u00f2 trong h\u1ec7 th\u1ed1ng DWDM<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>S\u1eeda l\u1ed7i ti\u1ebfn (FEC)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u1eeda l\u1ed7i d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea7n c\u1ee9ng b\u1ed5 sung, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady li\u00ean k\u1ebft.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Ki\u1ec3m so\u00e1t nhi\u1ec5u xung (Jitter Control)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh b\u01b0\u1edbc s\u00f3ng<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c tr\u00ean t\u1edbi 160 k\u00eanh (kho\u1ea3ng c\u00e1ch k\u00eanh nh\u1ecf t\u1edbi 0,4nm).<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>T\u1ef7 l\u1ec7 t\u00edn hi\u1ec7u tr\u00ean nhi\u1ec5u (SNR)<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Gi\u1eef t\u00edn hi\u1ec7u r\u00f5 r\u00e0ng sau khi khu\u1ebfch \u0111\u1ea1i.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c th\u00e1ch th\u1ee9c then ch\u1ed1t \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9<\/strong>: \u1ed4n \u0111\u1ecbnh b\u01b0\u1edbc s\u00f3ng laser \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kho\u1ea3ng c\u00e1ch k\u00eanh ch\u00ednh x\u00e1c.<\/p><\/li><li><p><strong>M\u1eadt \u0111\u1ed9 cao<\/strong>: H\u1ed7 tr\u1ee3 t\u1edbi 160 k\u00eanh tr\u00ean m\u1ed7i s\u1ee3i quang.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\ud83d\udd39 <strong>B\u1ed9 gh\u00e9p k\u00eanh v\u00e0 b\u1ed9 t\u00e1ch k\u00eanh<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vai tr\u00f2<\/strong>: Cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u \u0111a k\u00eanh tr\u00ean m\u1ed9t s\u1ee3i quang duy nh\u1ea5t. <strong>C\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>B\u1ed9 gh\u00e9p k\u00eanh (MUX)<\/strong>: K\u1ebft h\u1ee3p nhi\u1ec1u t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng (m\u1ed7i t\u00edn hi\u1ec7u c\u00f3 b\u01b0\u1edbc s\u00f3ng ri\u00eang bi\u1ec7t) v\u00e0o m\u1ed9t s\u1ee3i quang.<\/p><\/li><li><p><strong>B\u1ed9 t\u00e1ch k\u00eanh (DEMUX)<\/strong>: T\u00e1ch c\u00e1c t\u00edn hi\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c gh\u00e9p t\u1ea1i \u0111\u1ea7u thu.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c ti\u1ebfn b\u1ed9 v\u00e0 l\u1ee3i \u00edch<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>C\u00e1c \u0111\u1ed5i m\u1edbi<\/strong>: C\u00e1c thi\u1ebft b\u1ecb MUX\/DEMUX d\u1ef1a tr\u00ean c\u1ea5u tr\u00fac nano c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t gh\u00e9p n\u1ed1i.<\/p><\/li><li><p><strong>Hi\u1ec7u qu\u1ea3<\/strong>: Gi\u1ea3m r\u1ed1i lo\u1ea1n c\u00e1p v\u00e0 n\u00e2ng cao hi\u1ec7u n\u0103ng m\u1ea1ng.<\/p><\/li><li><p><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/strong>: Thi\u1ebft y\u1ebfu cho c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i c\u00f3 dung l\u01b0\u1ee3ng cao (v\u00ed d\u1ee5: truy\u1ec1n d\u1eabn 400G).<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\ud83d\udd39 <strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i quang<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vai tr\u00f2<\/strong>: T\u0103ng c\u01b0\u1eddng c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u m\u00e0 kh\u00f4ng chuy\u1ec3n \u0111\u1ed5i \u00e1nh s\u00e1ng sang t\u00edn hi\u1ec7u \u0111i\u1ec7n. <strong>C\u00e1c lo\u1ea1i v\u00e0 ch\u1ee9c n\u0103ng<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/erbium-doped-fiber-amplifier-optical-networks\/\"><strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha \u00ea-ri (EDFA)<\/strong><\/a>: Khu\u1ebfch \u0111\u1ea1i nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng \u0111\u1ed3ng th\u1eddi.<\/p><\/li><li><p><strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i Raman<\/strong>: T\u0103ng c\u01b0\u1eddng t\u00edn hi\u1ec7u d\u1ecdc theo s\u1ee3i quang cho truy\u1ec1n d\u1eabn kho\u1ea3ng c\u00e1ch c\u1ef1c xa.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u1ee3i \u00edch<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>H\u1ed7 tr\u1ee3 kho\u1ea3ng c\u00e1ch d\u00e0i<\/strong>: Cho ph\u00e9p truy\u1ec1n d\u1eef li\u1ec7u xuy\u00ean \u0111\u1ea1i d\u01b0\u01a1ng m\u00e0 kh\u00f4ng suy hao t\u00edn hi\u1ec7u.<\/p><\/li><li><p><strong>Ti\u1ebft ki\u1ec7m chi ph\u00ed<\/strong>: Gi\u1ea3m nhu c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb b\u1ed5 sung.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\ud83d\udd39 <strong>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u (Transponders)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vai tr\u00f2<\/strong>: Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u kh\u00e1ch h\u00e0ng sang c\u00e1c b\u01b0\u1edbc s\u00f3ng t\u01b0\u01a1ng th\u00edch v\u1edbi DWDM v\u00e0 gi\u00e1m s\u00e1t t\u00ecnh tr\u1ea1ng h\u1ec7 th\u1ed1ng. <strong>C\u00e1c ch\u1ee9c n\u0103ng ch\u00ednh<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Chuy\u1ec3n \u0111\u1ed5i b\u01b0\u1edbc s\u00f3ng<\/strong>: \u0110i\u1ec1u ch\u1ec9nh d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o th\u00e0nh c\u00e1c b\u01b0\u1edbc s\u00f3ng DWDM ch\u00ednh x\u00e1c.<\/p><\/li><li><p><strong>Ph\u00e1t hi\u1ec7n l\u1ed7i<\/strong>: Nh\u1eadn di\u1ec7n v\u00e0 s\u1eeda l\u1ed7i tr\u01b0\u1edbc khi truy\u1ec1n.<\/p><\/li><li><p><strong>Linh ho\u1ea1t<br><\/strong>: H\u1ed7 tr\u1ee3 d\u1eef li\u1ec7u \u0111a t\u1ed1c \u0111\u1ed9 (l\u00ean \u0111\u1ebfn 400G) v\u00e0 \u0111a d\u1ea1ng d\u1ecbch v\u1ee5 m\u1ea1ng.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u01afu \u0111i\u1ec3m<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ed9 tin c\u1eady<br><\/strong>: \u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u d\u1ecbch v\u1ee5 nghi\u00eam ng\u1eb7t.<\/p><\/li><li><p><strong>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/strong>: H\u1ed7 tr\u1ee3 gi\u1ea3i quy\u1ebft s\u1ef1 c\u1ed1 nhanh ch\u00f3ng.<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" >\ud83d\udd39 <strong>B\u1ed9 gh\u00e9p t\u00e1ch quang (OADMs)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Vai tr\u00f2<\/strong>: Th\u00eam ho\u1eb7c t\u00e1ch \u0111\u1ed9ng c\u00e1c b\u01b0\u1edbc s\u00f3ng c\u1ee5 th\u1ec3 m\u00e0 kh\u00f4ng l\u00e0m gi\u00e1n \u0111o\u1ea1n c\u00e1c k\u00eanh kh\u00e1c. <strong>L\u1ee3i \u00edch v\u1eadn h\u00e0nh<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p><strong>L\u1ee3i \u00edch<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>M\u00f4 t\u1ea3<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Hi\u1ec7u qu\u1ea3 chi ph\u00ed<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Tr\u00e1nh n\u00e2ng c\u1ea5p t\u1ed1n k\u00e9m b\u1eb1ng c\u00e1ch cho ph\u00e9p qu\u1ea3n l\u00fd k\u00eanh ch\u1ecdn l\u1ecdc.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n, gi\u1ea3m ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>M\u1eadt \u0111\u1ed9 c\u1ed5ng cao<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ti\u1ebft ki\u1ec7m kh\u00f4ng gian v\u1eadt l\u00fd trong t\u1ee7 m\u1ea1ng.<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Linh ho\u1ea1t<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u1ed7 tr\u1ee3 \u0111a d\u1ea1ng c\u1ea5u h\u00ecnh m\u1ea1ng (v\u00ed d\u1ee5: v\u00f2ng\/tr\u1ee5) v\u00e0 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c n\u00e2ng c\u1ea5p.<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c lo\u1ea1i<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>OADMs c\u1ed1 \u0111\u1ecbnh<\/strong>: \u0110\u01b0\u1ee3c c\u1ea5u h\u00ecnh s\u1eb5n cho m\u1ea1ng t\u0129nh.<\/p><\/li><li><p><strong>OADMs c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh l\u1ea1i (ROADMs)<\/strong>: Cho ph\u00e9p \u0111i\u1ec1u ch\u1ec9nh m\u1ea1ng t\u1eeb xa.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd ngh\u0129a<\/strong>: Thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi m\u1ea1ng DWDM c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 linh ho\u1ea1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a DWDM<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00dd t\u01b0\u1edfng c\u1ed1t l\u00f5i: Gh\u00e9p k\u00eanh \u00e1nh s\u00e1ng<\/strong><br\/><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">* DWDM (Gh\u00e9p k\u00eanh ph\u00e2n chia b\u01b0\u1edbc s\u00f3ng d\u00e0y \u0111\u1eb7c) l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u c\u1ee7a m\u1ed9t s\u1ee3i quang duy nh\u1ea5t b\u1eb1ng c\u00e1ch truy\u1ec1n \u0111\u1ed3ng th\u1eddi nhi\u1ec1u lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ed9c l\u1eadp.<\/span><br\/><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">* H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t xa l\u1ed9 nhi\u1ec1u l\u00e0n: m\u1ed7i l\u00e0n v\u1eadn chuy\u1ec3n l\u01b0u l\u01b0\u1ee3ng \u0111i t\u1edbi c\u00f9ng m\u1ed9t \u0111i\u1ec3m \u0111\u00edch chung, nh\u01b0ng c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n tr\u00ean c\u00e1c l\u00e0n kh\u00e1c nhau kh\u00f4ng tr\u1ed9n l\u1eabn. Trong DWDM, m\u1ed7i \u201cl\u00e0n\u201d l\u00e0 m\u1ed9t m\u00e0u s\u1eafc c\u1ee5 th\u1ec3 c\u1ee7a tia laser, mang lu\u1ed3ng d\u1eef li\u1ec7u ri\u00eang bi\u1ec7t. <\/span><strong>b\u01b0\u1edbc s\u00f3ng<\/strong><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\"> (m\u00e0u) c\u1ee7a tia laser, mang lu\u1ed3ng d\u1eef li\u1ec7u ri\u00eang bi\u1ec7t.<\/span><br\/><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">* Qu\u00e1 tr\u00ecnh k\u1ebft h\u1ee3p nhi\u1ec1u t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng l\u00ean m\u1ed9t s\u1ee3i quang \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <\/span><strong>gh\u00e9p k\u00eanh<\/strong><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">. M\u1ed9t thi\u1ebft b\u1ecb t\u00ean l\u00e0 <\/span><strong>b\u1ed9 gh\u00e9p k\u00eanh (Mux)<\/strong><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\"> k\u1ebft h\u1ee3p c\u00e1c b\u01b0\u1edbc s\u00f3ng kh\u00e1c nhau \u1edf \u0111\u1ea7u ph\u00e1t.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>T\u00e1ch k\u00eanh: Gi\u1eef c\u00e1c t\u00edn hi\u1ec7u t\u00e1ch bi\u1ec7t<\/strong><br\/>* Ch\u00eca kh\u00f3a \u0111\u1ec3 DWDM ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 l\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c b\u01b0\u1edbc s\u00f3ng g\u1ea7n nhau n\u00e0y (<br><strong>k\u00eanh<br><\/strong>) kh\u00f4ng g\u00e2y nhi\u1ec5u l\u1eabn nhau.<br>.<br\/>* H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t chi\u1ebfc radio: nhi\u1ec1u \u0111\u00e0i ph\u00e1t thanh ph\u00e1t s\u00f3ng \u1edf c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c nhau. B\u1ea1n \u0111i\u1ec1u ch\u1ec9nh radio c\u1ee7a m\u00ecnh \u0111\u1ebfn m\u1ed9t t\u1ea7n s\u1ed1 c\u1ee5 th\u1ec3 \u0111\u1ec3 ch\u1ec9 nghe \u0111\u01b0\u1ee3c \u0111\u00e0i \u0111\u00f3, b\u1ecf qua c\u00e1c \u0111\u00e0i c\u00f2n l\u1ea1i. DWDM ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, nh\u01b0ng s\u1eed d\u1ee5ng c\u00e1c b\u01b0\u1edbc s\u00f3ng \u00e1nh s\u00e1ng thay v\u00ec t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn.<br>.<br\/>* C\u00e1c b\u01b0\u1edbc s\u00f3ng \u0111\u01b0\u1ee3c x\u1ebfp r\u1ea5t d\u00e0y \u0111\u1eb7c, \u0111\u00f4i khi ch\u1ec9 c\u00e1ch nhau<br> <strong>0,8 nan\u00f4m\u00e9t<br><\/strong>.<br\/>* Vi\u1ec7c ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c ngu\u1ed3n laser v\u00e0 c\u00e1c k\u1ef9 thu\u1eadt l\u1ecdc tinh vi ng\u0103n ch\u1eb7n c\u00e1c k\u00eanh b\u1ecb tr\u00f4i ho\u1eb7c ch\u1ed3ng l\u1ea5n l\u00ean nhau \u2014 \u0111i\u1ec1u n\u00e0y s\u1ebd g\u00e2y l\u1ed7i d\u1eef li\u1ec7u.<br>.<br\/>* \u1ede \u0111\u1ea7u thu, m\u1ed9t thi\u1ebft b\u1ecb<br> <strong>t\u00e1ch k\u00eanh (Demux)<br><\/strong> ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t b\u1ed9 l\u1ecdc c\u00f3 \u0111\u1ed9 ch\u1ecdn l\u1ecdc cao. Thi\u1ebft b\u1ecb n\u00e0y t\u00e1ch lu\u1ed3ng \u00e1nh s\u00e1ng t\u1ed5ng h\u1ee3p tr\u1edf l\u1ea1i th\u00e0nh c\u00e1c b\u01b0\u1edbc s\u00f3ng\/k\u00eanh ri\u00eang l\u1ebb, \u0111\u1ecbnh h\u01b0\u1edbng t\u1eebng lu\u1ed3ng d\u1eef li\u1ec7u \u0111\u1ebfn \u0111\u00edch \u0111\u00fang c\u1ee7a n\u00f3.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Khu\u1ebfch \u0111\u1ea1i: T\u0103ng c\u01b0\u1eddng t\u00edn hi\u1ec7u<br><\/strong><br\/>* T\u00edn hi\u1ec7u \u00e1nh s\u00e1ng suy gi\u1ea3m khi truy\u1ec1n \u0111i xa trong s\u1ee3i quang.<br>.<br\/>* <strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i quang<br><\/strong>, nh\u01b0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/erbium-doped-fiber-amplifier-optical-networks\/\"><strong>B\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha \u00ea-ri (EDFA)<\/strong><\/a>, \u0111\u01b0\u1ee3c \u0111\u1eb7t d\u1ecdc theo tuy\u1ebfn c\u00e1p quang.<br>.<br\/>* C\u00e1c b\u1ed9 khu\u1ebfch \u0111\u1ea1i n\u00e0y t\u0103ng c\u01b0\u1eddng<br> <em>quang h\u1ecdc<\/em> c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u<br> <em>tr\u1ef1c ti\u1ebfp \u1edf d\u1ea1ng \u00e1nh s\u00e1ng<br><\/em>, m\u00e0 kh\u00f4ng c\u1ea7n chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u tr\u1edf l\u1ea1i d\u1ea1ng \u0111i\u1ec7n tr\u01b0\u1edbc ti\u00ean. \u0110i\u1ec1u n\u00e0y gi\u00fap vi\u1ec7c truy\u1ec1n d\u1eabn t\u1ed1c \u0111\u1ed9 cao tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i tr\u1edf n\u00ean hi\u1ec7u qu\u1ea3 v\u00e0 kh\u1ea3 thi.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>K\u1ebft qu\u1ea3: Dung l\u01b0\u1ee3ng d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3<br><\/strong><br\/>* B\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn c\u00e1c b\u01b0\u1edbc s\u00f3ng, x\u1ebfp ch\u00fang s\u00e1t nhau v\u00e0 s\u1eed d\u1ee5ng khu\u1ebfch \u0111\u1ea1i quang, DWDM cho ph\u00e9p m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng \u0111\u00e1ng kinh ng\u1ea1c c\u00e1c k\u00eanh (l\u00ean \u0111\u1ebfn<br> <strong>160 ho\u1eb7c nhi\u1ec1u h\u01a1n<br><\/strong>) truy\u1ec1n \u0111\u1ed3ng th\u1eddi tr\u00ean m\u1ed9t s\u1ee3i quang duy nh\u1ea5t.<br>.<br\/>* M\u1ed7i k\u00eanh ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao \u0111\u1ed9c l\u1eadp, c\u00f3 kh\u1ea3 n\u0103ng mang l\u01b0u l\u01b0\u1ee3ng internet, cu\u1ed9c g\u1ecdi \u0111i\u1ec7n tho\u1ea1i, lu\u1ed3ng video ho\u1eb7c b\u1ea5t k\u1ef3 lo\u1ea1i d\u1eef li\u1ec7u n\u00e0o kh\u00e1c.<br>.<br\/>* Nh\u1edd \u0111\u00f3, c\u00e1c h\u1ec7 th\u1ed1ng DWDM hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1ed5ng dung l\u01b0\u1ee3ng v\u01b0\u1ee3t tr\u1ed9i h\u01a1n<br> <strong>40 terabit m\u1ed7i gi\u00e2y<br><\/strong> tr\u00ean m\u1ed9t s\u1ee3i quang \u0111\u01a1n.<br>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>L\u1ee3i \u00edch ch\u00ednh: Hi\u1ec7u qu\u1ea3 &amp; Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<br><\/strong><br\/>* DWDM t\u1ed1i \u0111a h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng d\u1ea3i th\u00f4ng v\u1eadt l\u00fd v\u1ed1n c\u00f3 c\u1ee7a s\u1ee3i quang.<br>.<br\/>* L\u1ee3i th\u1ebf ch\u1ee7 y\u1ebfu c\u1ee7a n\u00f3 l\u00e0<br> <strong>kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<br><\/strong>: c\u00e1c nh\u00e0 khai th\u00e1c m\u1ea1ng c\u00f3 th\u1ec3 t\u0103ng dung l\u01b0\u1ee3ng m\u1ed9t c\u00e1ch \u0111\u00e1ng k\u1ec3 b\u1eb1ng c\u00e1ch th\u00eam nhi\u1ec1u b\u01b0\u1edbc s\u00f3ng (k\u00eanh) h\u01a1n v\u00e0o c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng<br> <em>hi\u1ec7n c\u00f3<\/em> c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang, tr\u00e1nh chi ph\u00ed l\u1edbn v\u00e0 s\u1ef1 gi\u00e1n \u0111o\u1ea1n nghi\u00eam tr\u1ecdng do l\u1eafp \u0111\u1eb7t c\u00e1p m\u1edbi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 DWDM so v\u1edbi CWDM: L\u1ef1a ch\u1ecdn c\u00f4ng c\u1ee5 ph\u00f9 h\u1ee3p<\/strong><\/h2>\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\/><p><strong>\u0110\u1eb7c t\u00ednh<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>CWDM (WDM th\u00f4)<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>DWDM (WDM d\u00e0y \u0111\u1eb7c)<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Kho\u1ea3ng c\u00e1ch k\u00eanh<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>R\u1ed9ng (20nm)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u1eb9p (0.8nm, 0.4nm\/50GHz, 0.2nm\/25GHz)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>K\u00eanh<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u01b0\u1eddng l\u00e0 8, 16 ho\u1eb7c 18 k\u00eanh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u00e0ng ch\u1ee5c \u0111\u1ebfn h\u00e0ng tr\u0103m k\u00eanh (v\u00ed d\u1ee5: 40, 80, 96, 192)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>D\u1ea3i b\u01b0\u1edbc s\u00f3ng<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u1eeb 1270nm \u0111\u1ebfn 1610nm (c\u00e1c d\u1ea3i O, E, S, C, L)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee7 y\u1ebfu \u1edf d\u1ea3i C (1530nm\u20131565nm) v\u00e0 d\u1ea3i L (1565nm\u20131625nm)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>10km, 20km, 40km<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kho\u1ea3ng c\u00e1ch ng\u1eafn h\u01a1n (t\u1ed1i \u0111a ~80km)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n d\u1eabn xa v\u00e0 si\u00eau xa (h\u00e0ng tr\u0103m\u2013h\u00e0ng ngh\u00ecn km)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Cost<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Th\u1ea5p h\u01a1n (th\u01b0\u1eddng kh\u00f4ng c\u1ea7n laser l\u00e0m m\u00e1t)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Cao h\u01a1n (y\u00eau c\u1ea7u laser \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9, dung sai ch\u1eb7t ch\u1ebd h\u01a1n)<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy c\u1eadp \u0111\u00f4 th\u1ecb, truy\u1ec1n d\u1eabn ng\u1eafn, nh\u1ea1y c\u1ea3m v\u1ec1 chi ph\u00ed<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Truy\u1ec1n d\u1eabn xa, c\u00e1p bi\u1ec3n, l\u00f5i \u0111\u00f4 th\u1ecb b\u0103ng th\u00f4ng cao, m\u1edf r\u1ed9ng quy m\u00f4 \u0111\u01b0\u1ee3c<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a c\u00f4ng ngh\u1ec7 DWDM<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng b\u0103ng th\u00f4ng kh\u1ed5ng l\u1ed3:<\/strong> \u0110\u00e2y l\u00e0 \u0111\u1ed9ng l\u1ef1c ch\u00ednh. DWDM nh\u00e2n l\u00ean dung l\u01b0\u1ee3ng c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ee3i quang hi\u1ec7n c\u00f3 v\u1edbi h\u1ec7 s\u1ed1 40, 80, 96 ho\u1eb7c cao h\u01a1n, tr\u00ec ho\u00e3n ho\u1eb7c lo\u1ea1i b\u1ecf nhu c\u1ea7u tri\u1ec3n khai s\u1ee3i quang m\u1edbi t\u1ed1n k\u00e9m.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Hi\u1ec7u qu\u1ea3 chi ph\u00ed:<\/strong> T\u1eadn d\u1ee5ng s\u1ee3i quang ch\u01b0a s\u1eed d\u1ee5ng (dark fiber) c\u00f9ng DWDM r\u1ebb h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1p m\u1edbi, \u0111\u1eb7c bi\u1ec7t tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i ho\u1eb7c trong c\u00e1c khu v\u1ef1c \u0111\u00f4 th\u1ecb \u0111\u00f4ng \u0111\u00fac.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u00ednh minh b\u1ea1ch giao th\u1ee9c v\u00e0 t\u1ed1c \u0111\u1ed9 bit:<\/strong> DWDM truy\u1ec1n d\u1eef li\u1ec7u b\u1ea5t k\u1ec3 giao th\u1ee9c n\u1ec1n (Ethernet, SONET\/SDH, Fibre Channel, InfiniBand) hay t\u1ed1c \u0111\u1ed9 bit (1G, 10G, 100G, 400G, 800G). N\u00f3 \u0111\u01a1n thu\u1ea7n mang t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Kh\u1ea3 n\u0103ng truy\u1ec1n d\u1eabn xa:<\/strong> K\u1ebft h\u1ee3p v\u1edbi b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang (EDFA) v\u00e0 b\u00f9 t\u00e1n s\u1eafc ti\u00ean ti\u1ebfn, DWDM cho ph\u00e9p truy\u1ec1n d\u1eabn tr\u00ean h\u00e0ng ngh\u00ecn kil\u00f4m\u00e9t, tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho x\u01b0\u01a1ng s\u1ed1ng \u0111\u1ea5t li\u1ec1n v\u00e0 c\u00e1p bi\u1ec3n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Qu\u1ea3n l\u00fd s\u1ee3i quang \u0111\u01a1n gi\u1ea3n h\u00f3a:<\/strong> T\u1eadp trung nhi\u1ec1u d\u1ecbch v\u1ee5 l\u00ean \u00edt s\u1ee3i quang h\u01a1n gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a ki\u1ebfn tr\u00fac m\u1ea1ng v\u00e0 gi\u1ea3m t\u1eafc ngh\u1ebdn s\u1ee3i quang trong c\u00e1c tuy\u1ebfn \u0111i.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 \u1ee8ng d\u1ee5ng: N\u01a1i DWDM th\u00fac \u0111\u1ea9y th\u1ebf gi\u1edbi hi\u1ec7n \u0111\u1ea1i<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>M\u1ea1ng x\u01b0\u01a1ng s\u1ed1ng vi\u1ec5n th\u00f4ng:<\/strong> C\u00e1c m\u1ea1ng l\u00f5i c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u1edbn ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o DWDM.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u00e1c \u0111i\u1ec3m trao \u0111\u1ed5i Internet (IXP):<\/strong> X\u1eed l\u00fd l\u01b0u l\u01b0\u1ee3ng k\u1ebft n\u1ed1i ngang h\u00e0ng (peering) kh\u1ed5ng l\u1ed3 gi\u1eefa c\u00e1c m\u1ea1ng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>M\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN):<\/strong> Ph\u00e2n ph\u1ed1i video v\u00e0 n\u1ed9i dung b\u0103ng th\u00f4ng cao tr\u00ean to\u00e0n c\u1ea7u.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u doanh nghi\u1ec7p (DCI):<\/strong> K\u1ebft n\u1ed1i an to\u00e0n v\u00e0 t\u1ed1c \u0111\u1ed9 cao gi\u1eefa c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u ph\u00e2n t\u00e1n v\u1ec1 m\u1eb7t \u0111\u1ecba l\u00fd.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 c\u00e1p:<\/strong> Cung c\u1ea5p d\u1ecbch v\u1ee5 video, tho\u1ea1i v\u00e0 b\u0103ng th\u00f4ng r\u1ed9ng.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>V\u1eadn chuy\u1ec3n 5G (Fronthaul, Midhaul, Backhaul):<\/strong> T\u1eadp h\u1ee3p l\u01b0\u1ee3ng l\u01b0u l\u01b0\u1ee3ng kh\u1ed5ng l\u1ed3 t\u1eeb c\u00e1c tr\u1ea1m g\u1ed1c.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 L\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t quang DWDM ph\u00f9 h\u1ee3p<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7u n\u0103ng v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng DWDM ph\u1ee5 thu\u1ed9c r\u1ea5t l\u1edbn v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/buy-dwdm.htm\"><strong>c\u00e1c module b\u1ed9 thu ph\u00e1t quang DWDM<\/strong><\/a>. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t g\u1ed3m:<br><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>H\u00ecnh d\u1ea1ng (Form Factor):<br><\/strong> SFP+ (10G), QSFP28 (100G), QSFP-DD\/OSFP (400G\/800G), t\u01b0\u01a1ng th\u00edch v\u1edbi c\u1ed5ng thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u0110\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh b\u01b0\u1edbc s\u00f3ng:<\/strong> Y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 tr\u00e1nh nhi\u1ec5u k\u00eanh trong c\u00e1c h\u1ec7 th\u1ed1ng d\u00e0y \u0111\u1eb7c. <strong>LINK-PP<\/strong> b\u1ed9 thu ph\u00e1t, nh\u01b0 <strong>LINK-PP <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/488746.htm\"><strong>LS-DW3210-40I<\/strong><\/a>, s\u1eed d\u1ee5ng laser \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c cao.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn:<br><\/strong> Ph\u1ea1m vi t\u1eeb 80 km \u0111\u1ebfn h\u01a1n 120 km; h\u00e3y l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean ng\u00e2n s\u00e1ch li\u00ean k\u1ebft c\u1ee7a b\u1ea1n.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>Ch\u1ea9n \u0111o\u00e1n:<\/strong> Gi\u00e1m s\u00e1t ch\u1ea9n \u0111o\u00e1n k\u1ef9 thu\u1eadt s\u1ed1 (DDM\/DOM) cung c\u1ea5p d\u1eef li\u1ec7u s\u1ee9c kh\u1ecfe th\u1eddi gian th\u1ef1c (nhi\u1ec7t \u0111\u1ed9, \u0111i\u1ec7n \u00e1p, c\u00f4ng su\u1ea5t ph\u00e1t\/nh\u1eadn).<\/p><\/li><li><p style=\"margin: 0px;\"><strong>T\u00ednh t\u01b0\u01a1ng th\u00edch:<\/strong> \u0110\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi n\u1ec1n t\u1ea3ng nh\u00e0 cung c\u1ea5p thi\u1ebft b\u1ecb m\u1ea1ng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u27a4 H\u01b0\u1edbng t\u1edbi t\u01b0\u01a1ng lai v\u1edbi Gi\u1ea3i ph\u00e1p DWDM LINK-PP<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi nhu c\u1ea7u v\u1ec1 b\u0103ng th\u00f4ng ti\u1ebfp t\u1ee5c t\u0103ng m\u1ea1nh kh\u00f4ng ng\u1eebng, <strong>DWDM<\/strong> v\u1eabn l\u00e0 gi\u1ea3i ph\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng. Vi\u1ec7c t\u1eadn d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ea5t l\u01b0\u1ee3ng cao, \u0111\u00e1ng tin c\u1eady l\u00e0 \u0111i\u1ec1u b\u1eaft bu\u1ed9c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u n\u0103ng v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>S\u1eb5n s\u00e0ng m\u1edf r\u1ed9ng dung l\u01b0\u1ee3ng m\u1ea1ng c\u1ee7a b\u1ea1n?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LINK-PP<\/strong> cung c\u1ea5p danh m\u1ee5c \u0111\u1ea7y \u0111\u1ee7 c\u00e1c b\u1ed9 thu ph\u00e1t quang DWDM hi\u1ec7u n\u0103ng cao, tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n, <strong>c\u00e1c module b\u1ed9 thu ph\u00e1t quang DWDM<\/strong>, bao g\u1ed3m c\u00e1c d\u1ea1ng th\u1ee9c SFP+, QSFP28, QSFP-DD v\u00e0 OSFP, h\u1ed7 tr\u1ee3 t\u1ea5t c\u1ea3 c\u00e1c b\u01b0\u1edbc s\u00f3ng ITU ti\u00eau chu\u1ea9n v\u00e0 kho\u1ea3ng c\u00e1ch. C\u00e1c gi\u1ea3i ph\u00e1p c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c ki\u1ec3m tra nghi\u00eam ng\u1eb7t v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady, \u0111\u1ea3m b\u1ea3o t\u00edch h\u1ee3p li\u1ec1n m\u1ea1ch v\u00e0o c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng DWDM hi\u1ec7n c\u00f3 ho\u1eb7c c\u00e1c tri\u1ec3n khai m\u1edbi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Kh\u00e1m ph\u00e1 ngay lo\u1ea1t b\u1ed9 thu ph\u00e1t quang DWDM ti\u00ean ti\u1ebfn c\u1ee7a ch\u00fang t\u00f4i v\u00e0 t\u00ecm hi\u1ec3u c\u00e1ch LINK-PP gi\u00fap b\u1ea1n t\u1ed1i \u0111a h\u00f3a kho\u1ea3n \u0111\u1ea7u t\u01b0 s\u1ee3i quang c\u0169ng nh\u01b0 d\u1ec5 d\u00e0ng \u0111\u00e1p \u1ee9ng c\u00e1c th\u00e1ch th\u1ee9c v\u1ec1 b\u0103ng th\u00f4ng trong t\u01b0\u01a1ng lai. <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>Truy c\u1eadp trang web c\u1ee7a ch\u00fang t\u00f4i \u279e<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n c\u00e1 nh\u00e2n h\u00f3a v\u00e0 kh\u00e1m ph\u00e1 s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C1: B\u1ed9 gh\u00e9p k\u00eanh (multiplexer) th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng g\u00ec trong m\u1ea1ng c\u00e1p quang?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A: <\/strong>B\u1ed9 gh\u00e9p k\u00eanh k\u1ebft h\u1ee3p nhi\u1ec1u t\u00edn hi\u1ec7u d\u1eef li\u1ec7u v\u00e0o m\u1ed9t s\u1ee3i c\u00e1p. M\u1ed7i t\u00edn hi\u1ec7u s\u1eed d\u1ee5ng m\u1ed9t b\u01b0\u1edbc s\u00f3ng ri\u00eang, gi\u1ed1ng nh\u01b0 m\u1ed9t m\u00e0u s\u1eafc kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u1ea1ng truy\u1ec1n t\u1ea3i nhi\u1ec1u th\u00f4ng tin h\u01a1n c\u00f9ng l\u00fac. N\u00f3 gi\u00fap khai th\u00e1c t\u1ed1i \u01b0u kh\u00f4ng gian s\u1eb5n c\u00f3 tr\u00ean s\u1ee3i quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C2: L\u1ee3i \u00edch ch\u00ednh khi s\u1eed d\u1ee5ng b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang l\u00e0 g\u00ec?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong> B\u1ed9 khu\u1ebfch \u0111\u1ea1i quang l\u00e0m m\u1ea1nh t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng m\u00e0 kh\u00f4ng thay \u0111\u1ed5i ch\u00fang. Ch\u00fang kh\u00f4ng chuy\u1ec3n \u0111\u1ed5i \u00e1nh s\u00e1ng th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. Nh\u1edd \u0111\u00f3, d\u1eef li\u1ec7u duy tr\u00ec \u0111\u1ed9 m\u1ea1nh tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i. \u0110\u1ed3ng th\u1eddi, \u0111i\u1ec1u n\u00e0y c\u0169ng gi\u00fap gi\u1ea3m thi\u1ec3u nhu c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb b\u1ed5 sung.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C3: \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu hai k\u00eanh ch\u1ed3ng l\u1ea5n v\u1ec1 b\u01b0\u1edbc s\u00f3ng?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong> N\u1ebfu hai k\u00eanh ch\u1ed3ng l\u1ea5n, t\u00edn hi\u1ec7u c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 tr\u1ed9n l\u1eabn v\u00e0 g\u00e2y ra l\u1ed7i. M\u1ea1ng c\u00f3 th\u1ec3 m\u1ea5t d\u1eef li\u1ec7u ho\u1eb7c g\u1eb7p nhi\u1ec5u. Vi\u1ec7c ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn c\u00e1c b\u01b0\u1edbc s\u00f3ng s\u1ebd ng\u0103n ch\u1eb7n t\u00ecnh hu\u1ed1ng n\u00e0y v\u00e0 gi\u1eef cho m\u1ed7i k\u00eanh lu\u00f4n r\u00f5 r\u00e0ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C4: B\u1ed9 gh\u00e9p k\u00eanh quang th\u00eam\/b\u1edbt (OADM) \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong> B\u1ed9 gh\u00e9p k\u00eanh quang th\u00eam\/b\u1edbt (OADM) cho ph\u00e9p m\u1ea1ng th\u00eam ho\u1eb7c lo\u1ea1i b\u1ecf c\u00e1c b\u01b0\u1edbc s\u00f3ng nh\u1ea5t \u0111\u1ecbnh kh\u1ecfi m\u1ed9t s\u1ee3i c\u00e1p. C\u00f4ng c\u1ee5 n\u00e0y gi\u00fap ng\u01b0\u1eddi v\u1eadn h\u00e0nh \u0111i\u1ec1u ch\u1ec9nh m\u1ea1ng m\u1ed9t c\u00e1ch linh ho\u1ea1t. N\u00f3 l\u00e0m cho vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn d\u1eef li\u1ec7u tr\u1edf n\u00ean linh ho\u1ea1t v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C5: Nh\u1eefng lo\u1ea1i m\u1ea1ng n\u00e0o s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 DWDM?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong> Nhi\u1ec1u m\u1ea1ng quy m\u00f4 l\u1edbn s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 DWDM. Trong \u0111\u00f3 bao g\u1ed3m m\u1ea1ng l\u00f5i vi\u1ec5n th\u00f4ng, li\u00ean k\u1ebft trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u00e1m m\u00e2y. DWDM gi\u00fap c\u00e1c m\u1ea1ng n\u00e0y truy\u1ec1n t\u1ea3i kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch nhanh ch\u00f3ng v\u00e0 an to\u00e0n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u27a4 Xem th\u00eam<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/wdm-optical-transceiver-module-applications\/\">Kh\u00e1m ph\u00e1 C\u00f4ng ngh\u1ec7 WDM v\u00e0 Vai tr\u00f2 c\u1ee7a n\u00f3 trong M\u1ea1ng Quang<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ddm-dom-in-optical-transceivers\/\">T\u1ea7m quan tr\u1ecdng c\u1ee7a gi\u00e1m s\u00e1t k\u1ef9 thu\u1eadt s\u1ed1 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\/glossary\/erbium-doped-fiber-amplifier-optical-networks\/\">Gi\u1edbi thi\u1ec7u v\u1ec1 B\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha erbi trong M\u1ea1ng<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/qsfp-dd-optical-transceivers-faster-connections\/\">Tham gia v\u00e0 K\u1ebft n\u1ed1i v\u1edbi C\u1ed9ng \u0111\u1ed3ng M\u1ea1ng LINK-PP<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>DWDM l\u00e0 g\u00ec? \u0110a h\u1ee3p ph\u00e2n chia b\u01b0\u1edbc s\u00f3ng m\u1eadt \u0111\u1ed9 cao (Dense Wavelength Division Multiplexing) cho ph\u00e9p nhi\u1ec1u k\u00eanh d\u1eef li\u1ec7u truy\u1ec1n tr\u00ean m\u1ed9t s\u1ee3i quang, n\u00e2ng cao b\u0103ng th\u00f4ng v\u00e0 hi\u1ec7u su\u1ea5t trong c\u00e1c m\u1ea1ng quang.<\/p>","protected":false},"author":1,"featured_media":4292,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[26],"class_list":["post-4294","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\/4294","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=4294"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4294\/revisions"}],"predecessor-version":[{"id":11444,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/4294\/revisions\/11444"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/4292"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=4294"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=4294"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=4294"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}