{"id":2469,"date":"2026-04-09T00:00:00","date_gmt":"2026-04-09T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-oeo-optical-electrical-optical\/"},"modified":"2026-06-22T03:35:59","modified_gmt":"2026-06-22T03:35:59","slug":"what-is-oeo-optical-electrical-optical","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-oeo-optical-electrical-optical","title":{"rendered":"OEO (Quang\u2013\u0110i\u1ec7n\u2013Quang) trong li\u00ean k\u1ebft s\u1ee3i quang l\u00e0 g\u00ec?"},"content":{"rendered":"
\"What<\/figure>\n\n\n\n

Trong c\u00e1c m\u1ea1ng truy\u1ec1n th\u00f4ng quang hi\u1ec7n \u0111\u1ea1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong DWDM<\/a> (\u0110a gh\u00e9p k\u00eanh theo b\u01b0\u1edbc s\u00f3ng d\u00e0y \u0111\u1eb7c) h\u1ec7 th\u1ed1ng, vi\u1ec7c duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c k\u1ef9 thu\u1eadt l\u1edbn. Khi t\u00edn hi\u1ec7u quang truy\u1ec1n qua s\u1ee3i quang, ch\u00fang d\u1ea7n suy gi\u1ea3m do suy hao<\/a>, s\u1ef1 t\u00e1n s\u1eafc v\u00e0 s\u1ef1 t\u00edch l\u0169y nhi\u1ec5u. Khi m\u1ee9c suy gi\u1ea3m n\u00e0y tr\u1edf n\u00ean qu\u00e1 nghi\u00eam tr\u1ecdng, vi\u1ec7c khu\u1ebfch \u0111\u1ea1i quang \u0111\u01a1n thu\u1ea7n ho\u1eb7c b\u00f9 t\u00e1n s\u1eafc kh\u00f4ng c\u00f2n \u0111\u1ee7 hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

\u0110\u00e2y l\u00e0 n\u01a1i Quang\u2013\u0110i\u1ec7n\u2013Quang (OEO)<\/strong> \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t.<\/p>\n\n\n\n

OEO l\u00e0 m\u1ed9t quy tr\u00ecnh t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u, trong \u0111\u00f3 t\u00edn hi\u1ec7u quang \u0111\u1ea7u v\u00e0o \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n, x\u1eed l\u00fd r\u1ed3i sau \u0111\u00f3 ph\u00e1t l\u1ea1i d\u01b0\u1edbi d\u1ea1ng t\u00edn hi\u1ec7u quang s\u1ea1ch. Kh\u00e1c v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n quang th\u1ee5 \u0111\u1ed9ng, OEO cho ph\u00e9p kh\u00f4i ph\u1ee5c to\u00e0n b\u1ed9 t\u00edn hi\u1ec7u th\u00f4ng qua c\u00e1i g\u1ecdi l\u00e0 t\u00e1i t\u1ea1o 3R: khu\u1ebfch \u0111\u1ea1i l\u1ea1i, \u0111\u1ecbnh h\u00ecnh l\u1ea1i v\u00e0 \u0111\u1ed3ng b\u1ed9 l\u1ea1i.<\/p>\n\n\n\n

Truy\u1ec1n th\u1ed1ng, OEO \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n d\u1eabn quang \u0111\u01b0\u1eddng d\u00e0i, c\u00e1c n\u00fat t\u00e1i t\u1ea1o v\u00e0 c\u00e1c m\u1ea1ng DWDM c\u0169 n\u01a1i c\u00e1c suy hao t\u00edn hi\u1ec7u t\u00edch l\u0169y tr\u00ean kho\u1ea3ng c\u00e1ch d\u00e0i. Tuy nhi\u00ean, c\u00f9ng v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a quang h\u1ecdc k\u1ebft h\u1ee3p (coherent optics) v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 d\u1ef1a tr\u00ean x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 (DSP), vai tr\u00f2 c\u1ee7a OEO \u0111ang d\u1ea7n thay \u0111\u1ed5i trong c\u00e1c ki\u1ebfn tr\u00fac m\u1ea1ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n

Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd gi\u1ea3i th\u00edch OEO l\u00e0 g\u00ec, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, l\u00fd do s\u1eed d\u1ee5ng v\u00e0 c\u00e1ch so s\u00e1nh n\u00f3 v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 quang h\u1ecdc c\u1ed1t l\u00f5i kh\u00e1c nh\u01b0 DCM v\u00e0 EDFA<\/a>\u2014 gi\u00fap b\u1ea1n hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 vai tr\u00f2 c\u1ee7a n\u00f3 trong c\u1ea3 c\u00e1c m\u1ea1ng quang th\u1ebf h\u1ec7 c\u0169 l\u1eabn th\u1ebf h\u1ec7 ti\u1ebfp theo.<\/p>\n\n\n\n

\ud83d\udfe7 OEO trong truy\u1ec1n th\u00f4ng quang l\u00e0 g\u00ec?<\/h2>\n\n\n\n

OEO l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u, trong \u0111\u00f3 t\u00edn hi\u1ec7u quang \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i sang t\u00edn hi\u1ec7u \u0111i\u1ec7n r\u1ed3i l\u1ea1i chuy\u1ec3n ng\u01b0\u1ee3c v\u1ec1 t\u00edn hi\u1ec7u quang.<\/strong> T\u00e0i li\u1ec7u DWDM c\u1ee7a Cisco ghi nh\u1eadn r\u1eb1ng c\u00e1c card TXP v\u00e0 MXP th\u1ef1c hi\u1ec7n chuy\u1ec3n \u0111\u1ed5i OEO, ngh\u0129a l\u00e0 ch\u00fang kh\u00f4ng trong su\u1ed1t v\u1ec1 m\u1eb7t quang v\u00ec t\u00edn hi\u1ec7u b\u1ecb x\u1eed l\u00fd ch\u1ee7 \u00fd trong mi\u1ec1n \u0111i\u1ec7n tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c ti\u1ebfp t\u1ee5c truy\u1ec1n \u0111i.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

OEO trong m\u1ed9t c\u00e2u<\/h3>\n\n\n\n

M\u1ed9t \u0111\u1ecbnh ngh\u0129a h\u1eefu \u00edch l\u00e0: OEO l\u00e0 quy tr\u00ecnh t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u 3R \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ea1ng quang nh\u1eb1m kh\u00f4i ph\u1ee5c d\u1eef li\u1ec7u \u0111\u00e3 suy gi\u1ea3m tr\u01b0\u1edbc khi t\u00e1i ph\u00e1t..<\/strong> M\u1ed9t h\u01b0\u1edbng d\u1eabn l\u1eadp k\u1ebf ho\u1ea1ch v\u1eadn chuy\u1ec3n gi\u1ea3i th\u00edch r\u1eb1ng t\u00e1i t\u1ea1o bao g\u1ed3m khu\u1ebfch \u0111\u1ea1i l\u1ea1i, t\u00e1i t\u1ea1o l\u1ea1i v\u00e0 \u0111\u1ed3ng b\u1ed9 l\u1ea1i \u2014 ch\u00ednh v\u00ec v\u1eady OEO \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i c\u00e1c \u0111i\u1ec3m t\u00e1i t\u1ea1o ch\u1ee9 kh\u00f4ng ph\u1ea3i tr\u00ean c\u00e1c \u0111o\u1ea1n tuy\u1ebfn th\u00f4ng th\u01b0\u1eddng.<\/p>\n\n\n\n

T\u1ea1i sao Quang\u2013\u0110i\u1ec7n\u2013Quang l\u1ea1i quan tr\u1ecdng<\/h3>\n\n\n\n

Thu\u1eadt ng\u1eef OEO xu\u1ea5t hi\u1ec7n th\u01b0\u1eddng xuy\u00ean trong t\u00e0i li\u1ec7u DWDM, OTN<\/a>, v\u00e0 truy\u1ec1n d\u1eabn quang \u0111\u01b0\u1eddng d\u00e0i v\u00ec n\u00f3 m\u00f4 t\u1ea3 m\u1ed9t b\u01b0\u1edbc kh\u00f4i ph\u1ee5c to\u00e0n di\u1ec7n, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t bi\u1ec7n ph\u00e1p kh\u1eafc ph\u1ee5c c\u1ee5c b\u1ed9. N\u1ebfu m\u1ed9t li\u00ean k\u1ebft ch\u1ec9 c\u1ea7n t\u0103ng th\u00eam c\u00f4ng su\u1ea5t, b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang c\u00f3 th\u1ec3 \u0111\u1ee7; n\u1ebfu c\u1ea7n hi\u1ec7u ch\u1ec9nh t\u00e1n s\u1eafc, DCM c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3. Nh\u01b0ng n\u1ebfu t\u00edn hi\u1ec7u b\u1ecb h\u01b0 h\u1ea1i qu\u00e1 n\u1eb7ng \u0111\u1ec3 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ec9 d\u00f9ng quang kh\u00f4ng th\u1ec3 x\u1eed l\u00fd, OEO tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn m\u1ea1nh h\u01a1n.<\/p>\n\n\n\n

\ud83d\udfe7 OEO ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong m\u1ea1ng quang?<\/h2>\n\n\n\n

OEO ho\u1ea1t \u0111\u1ed9ng theo ba giai \u0111o\u1ea1n: quang v\u00e0o, x\u1eed l\u00fd \u0111i\u1ec7n, quang ra<\/strong>. Cisco m\u00f4 t\u1ea3 quy tr\u00ecnh n\u00e0y l\u00e0 chuy\u1ec3n \u0111\u1ed5i O\u2013E\u2013O, trong \u0111\u00f3 b\u1ed9 t\u00e1i t\u1ea1o t\u00e1i t\u1ea1o c\u00e1c t\u00edn hi\u1ec7u quang y\u1ebfu v\u00e0 m\u00e9o m\u00f3 b\u1eb1ng c\u00e1ch \u0111\u1ea7u ti\u00ean chuy\u1ec3n ch\u00fang sang d\u1ea1ng \u0111i\u1ec7n r\u1ed3i sau \u0111\u00f3 ph\u00e1t l\u1ea1i d\u01b0\u1edbi d\u1ea1ng t\u00edn hi\u1ec7u quang.<\/p>\n\n\n\n

\"How<\/figure>\n\n\n\n

B\u01b0\u1edbc 1: Ti\u1ebfp nh\u1eadn t\u00edn hi\u1ec7u quang<\/h3>\n\n\n\n

T\u00edn hi\u1ec7u quang \u0111\u1ea7u v\u00e0o \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb m\u1ea1ng ti\u1ebfp nh\u1eadn v\u00e0 chuy\u1ec3n t\u1eeb \u00e1nh s\u00e1ng sang t\u00edn hi\u1ec7u \u0111i\u1ec7n. \u0110\u00e2y l\u00e0 th\u1eddi \u0111i\u1ec3m thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 ki\u1ec3m tra n\u1ed9i dung d\u1eef li\u1ec7u th\u1ef1c t\u1ebf thay v\u00ec ch\u1ec9 m\u1ee9c c\u00f4ng su\u1ea5t quang. C\u00e1c t\u00e0i li\u1ec7u tham kh\u1ea3o v\u1ec1 OEO l\u00e0m r\u00f5 r\u1eb1ng vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m cho ph\u00e9p h\u1ec7 th\u1ed1ng x\u1eed l\u00fd tr\u1ef1c ti\u1ebfp t\u00edn hi\u1ec7u.<\/p>\n\n\n\n

B\u01b0\u1edbc 2: X\u1eed l\u00fd trong mi\u1ec1n \u0111i\u1ec7n<\/h3>\n\n\n\n

Khi t\u00edn hi\u1ec7u \u0111\u00e3 \u1edf d\u1ea1ng \u0111i\u1ec7n, thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n ba ch\u1ee9c n\u0103ng c\u1ed5 \u0111i\u1ec3n 3R: khu\u1ebfch \u0111\u1ea1i l\u1ea1i, \u0111\u1ecbnh h\u00ecnh l\u1ea1i v\u00e0 \u0111\u1ed3ng b\u1ed9 l\u1ea1i. Cisco x\u00e1c \u0111\u1ecbnh r\u00f5 nh\u1eefng ch\u1ee9c n\u0103ng n\u00e0y l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a qu\u00e1 tr\u00ecnh t\u00e1i t\u1ea1o, gi\u00fap lo\u1ea1i b\u1ecf nhi\u1ec5u v\u00e0 m\u00e9o m\u00e0 vi\u1ec7c khu\u1ebfch \u0111\u1ea1i quang \u0111\u01a1n thu\u1ea7n kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c.<\/p>\n\n\n\n

B\u01b0\u1edbc 3: Ph\u00e1t l\u1ea1i t\u00edn hi\u1ec7u quang<\/h3>\n\n\n\n

Sau khi x\u1eed l\u00fd, t\u00edn hi\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i tr\u1edf l\u1ea1i d\u1ea1ng quang v\u00e0 \u0111\u01b0a v\u00e0o \u0111o\u1ea1n s\u1ee3i quang ti\u1ebfp theo. \u0110\u00f3 l\u00e0 l\u00fd do v\u00ec sao OEO th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i c\u00e1c \u0111i\u1ec3m t\u00e1i t\u1ea1o trong c\u00e1c m\u1ea1ng truy\u1ec1n d\u1eabn \u0111\u01b0\u1eddng d\u00e0i thay v\u00ec t\u1ea1i m\u1ecdi n\u00fat trung gian.<\/p>\n\n\n\n

T\u1ea1i sao OEO v\u01b0\u1ee3t xa ch\u1ee9c n\u0103ng khu\u1ebfch \u0111\u1ea1i<\/h3>\n\n\n\n

M\u1ed9t b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang<\/a> nh\u01b0 EDFA ch\u1ec9 n\u00e2ng cao c\u00f4ng su\u1ea5t t\u00edn hi\u1ec7u; n\u00f3 kh\u00f4ng s\u1eeda ch\u1eefa m\u1eabu bit hay lo\u1ea1i b\u1ecf c\u00e1c sai l\u1ec7ch th\u1eddi gian \u0111\u00e3 t\u00edch l\u0169y. OEO \u0111i xa h\u01a1n v\u00ec n\u00f3 x\u00e2y d\u1ef1ng l\u1ea1i t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi t\u00e1i ph\u00e1t. Ch\u00ednh v\u00ec v\u1eady OEO \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ee9c suy gi\u1ea3m nghi\u00eam tr\u1ecdng \u0111\u1ebfn m\u1ee9c ch\u1ec9 t\u0103ng c\u00f4ng su\u1ea5t l\u00e0 ch\u01b0a \u0111\u1ee7.<\/p>\n\n\n\n

\ud83d\udfe7 V\u00ec sao OEO \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong DWDM v\u00e0 c\u00e1c li\u00ean k\u1ebft \u0111\u01b0\u1eddng d\u00e0i?<\/h2>\n\n\n\n

OEO \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong DWDM v\u00e0 c\u00e1c li\u00ean k\u1ebft \u0111\u01b0\u1eddng d\u00e0i v\u00ec t\u00edn hi\u1ec7u quang t\u00edch l\u0169y suy hao khi kho\u1ea3ng c\u00e1ch t\u0103ng l\u00ean. T\u00e0i li\u1ec7u l\u1eadp k\u1ebf ho\u1ea1ch DWDM c\u1ee7a Cisco gi\u1ea3i th\u00edch r\u1eb1ng suy hao v\u00e0 t\u00e1n s\u1eafc l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u tr\u00ean s\u1ee3i quang, v\u00e0 m\u1ed9t b\u1ed9 t\u00e1i t\u1ea1o l\u00e0 c\u1ea7n thi\u1ebft khi t\u00edn hi\u1ec7u tr\u1edf n\u00ean qu\u00e1 y\u1ebfu v\u00e0 m\u00e9o \u0111\u1ec3 c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c tr\u1ef1c ti\u1ebfp.<\/p>\n\n\n\n

\"Why<\/figure>\n\n\n\n

Truy\u1ec1n d\u1eabn \u0111\u01b0\u1eddng d\u00e0i g\u00e2y ra suy hao t\u00edch l\u0169y<\/h3>\n\n\n\n

Tr\u00ean nhi\u1ec1u \u0111o\u1ea1n n\u1ed1i, t\u00edn hi\u1ec7u ch\u1ecbu t\u1ed5n th\u1ea5t, t\u00e1n s\u1eafc v\u00e0 nhi\u1ec5u. Khi t\u1ed5ng suy hao v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng x\u1eed l\u00fd c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ec9 d\u00f9ng quang, OEO cung c\u1ea5p m\u1ed9t \u0111i\u1ec3m kh\u00f4i ph\u1ee5c to\u00e0n di\u1ec7n trong m\u1ea1ng. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong thi\u1ebft k\u1ebf x\u01b0\u01a1ng s\u1ed1ng \u0111\u01b0\u1eddng d\u00e0i v\u00e0 trong c\u00e1c h\u1ec7 th\u1ed1ng DWDM c\u0169 v\u1edbi ng\u00e2n s\u00e1ch suy hao h\u1ea1n ch\u1ebf h\u01a1n.<\/p>\n\n\n\n

C\u00e1c \u0111i\u1ec3m t\u00e1i t\u1ea1o trong m\u1ea1ng<\/h3>\n\n\n\n

V\u1ec1 m\u1eb7t thu\u1eadt ng\u1eef, c\u00e1c tr\u1ea1m t\u00e1i t\u1ea1o l\u00e0 nh\u1eefng v\u1ecb tr\u00ed trong m\u1ea1ng n\u01a1i c\u00e1c t\u00edn hi\u1ec7u quang suy y\u1ebfu \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i ch\u00fang th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n r\u1ed3i l\u1ea1i chuy\u1ec3n ng\u01b0\u1ee3c tr\u1edf l\u1ea1i th\u00e0nh t\u00edn hi\u1ec7u quang. N\u00f3i c\u00e1ch kh\u00e1c, OEO kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u01b0\u1edbc b\u1ed5 sung ng\u1eabu nhi\u00ean; \u0111\u00e2y l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn ki\u1ebfn tr\u00fac c\u00f3 ch\u1ee7 \u0111\u00edch t\u1ea1i nh\u1eefng \u0111i\u1ec3m m\u00e0 li\u00ean k\u1ebft c\u1ea7n t\u00e1i t\u1ea1o l\u1ea1i t\u00edn hi\u1ec7u thay v\u00ec ch\u1ec9 khu\u1ebfch \u0111\u1ea1i \u0111\u01a1n thu\u1ea7n.<\/p>\n\n\n\n

Nh\u1eefng n\u01a1i OEO v\u1eabn c\u00f2n quan tr\u1ecdng nh\u1ea5t<\/h3>\n\n\n\n

OEO v\u1eabn c\u00f2n li\u00ean quan trong c\u00e1c m\u1ea1ng DWDM c\u0169, c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u00f4 th\u1ecb (metro) c\u0169 v\u00e0 c\u00e1c li\u00ean k\u1ebft m\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf tr\u01b0\u1edbc khi c\u00f4ng ngh\u1ec7 coherent tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn. ti\u00ean ti\u1ebfn<\/a> Trong nh\u1eefng m\u00f4i tr\u01b0\u1eddng \u0111\u00f3, t\u00e1i t\u1ea1o quang v\u1eabn l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c t\u1ebf \u0111\u1ec3 m\u1edf r\u1ed9ng ph\u1ea1m vi truy\u1ec1n d\u1eabn v\u00e0 \u1ed5n \u0111\u1ecbnh hi\u1ec7u n\u0103ng.<\/p>\n\n\n\n

\ud83d\udfe7 OEO so v\u1edbi DCM so v\u1edbi EDFA: S\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n\n\n\n

Ba c\u00f4ng ngh\u1ec7 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp c\u00f9ng nhau v\u00ec ch\u00fang gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 kh\u00e1c nhau trong c\u00f9ng m\u1ed9t chu\u1ed7i truy\u1ec1n d\u1eabn. DCM
<\/strong><\/a> x\u1eed l\u00fd hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc, EDFA<\/strong> x\u1eed l\u00fd hi\u1ec7n t\u01b0\u1ee3ng suy hao, v\u00e0 OEO
<\/strong> x\u1eed l\u00fd t\u00e1i t\u1ea1o \u0111\u1ea7y \u0111\u1ee7 m\u1ed9t t\u00edn hi\u1ec7u b\u1ecb suy gi\u1ea3m. C\u00e1c t\u00e0i li\u1ec7u tham kh\u1ea3o DWDM c\u1ee7a Cisco ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng ba ch\u1ee9c n\u0103ng n\u00e0y: DCM b\u00f9 tr\u1eeb t\u00e1n s\u1eafc s\u1eafc chromatic, EDFA cung c\u1ea5p khu\u1ebfch \u0111\u1ea1i quang, v\u00e0 b\u1ed9 t\u00e1i t\u1ea1o OEO t\u00e1i t\u1ea1o l\u1ea1i t\u00edn hi\u1ec7u th\u00f4ng qua qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i quang\u2013\u0111i\u1ec7n\u2013quang.<\/p>\n\n\n\n

\"OEO<\/figure>\n\n\n\n

DCM: Kh\u1eafc ph\u1ee5c t\u00e1n s\u1eafc s\u1eafc chromatic<\/h3>\n\n\n\n

DCM s\u1eed d\u1ee5ng t\u00e1n s\u1eafc \u00e2m \u0111\u1ec3 b\u00f9 l\u1ea1i hi\u1ec7n t\u01b0\u1ee3ng lan r\u1ed9ng xung x\u1ea3y ra trong s\u1ee3i quang. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn DCU n\u00eau r\u1eb1ng thi\u1ebft b\u1ecb n\u00e0y b\u00f9 tr\u1eeb t\u00e1n s\u1eafc s\u1eafc chromatic t\u00edch l\u0169y trong s\u1ee3i truy\u1ec1n d\u1eabn v\u00e0 cung c\u1ea5p m\u1ed9t c\u00e1ch th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3 m\u00e0 kh\u00f4ng c\u1ea7n t\u1eaft v\u00e0 t\u00e1i t\u1ea1o l\u1ea1i c\u00e1c b\u01b0\u1edbc s\u00f3ng.<\/p>\n\n\n\n

EDFA: T\u0103ng c\u01b0\u1eddng c\u00f4ng su\u1ea5t quang<\/h3>\n\n\n\n

EDFA l\u00e0 m\u1ed9t b\u1ed9 khu\u1ebfch \u0111\u1ea1i quang. Theo nh\u1eadn th\u1ee9c chung trong ng\u00e0nh, c\u00e1c card khu\u1ebfch \u0111\u1ea1i EDFA l\u00e0 nh\u1eefng thi\u1ebft b\u1ecb cung c\u1ea5p \u0111\u1ed9 l\u1ee3i cho t\u00edn hi\u1ec7u DWDM, gi\u00fap duy tr\u00ec c\u00f4ng su\u1ea5t tr\u00ean nhi\u1ec1u \u0111o\u1ea1n truy\u1ec1n. Tuy nhi\u00ean, ri\u00eang vi\u1ec7c khu\u1ebfch \u0111\u1ea1i kh\u00f4ng th\u1ec3 s\u1eeda ch\u1eefa hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n s\u1eafc hay suy gi\u1ea3m th\u1eddi gian.<\/p>\n\n\n\n

OEO: X\u00e2y d\u1ef1ng l\u1ea1i t\u00edn hi\u1ec7u<\/h3>\n\n\n\n

OEO l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t trong ba l\u1ef1a ch\u1ecdn n\u00e0y. M\u1ed9t s\u1ed1 t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn DWDM cho th\u1ea5y t\u00e1i t\u1ea1o lo\u1ea1i b\u1ecf nhi\u1ec5u v\u00e0 m\u00e9o d\u1ea1ng b\u1eb1ng c\u00e1ch chuy\u1ec3n \u0111\u1ed5i t\u1eeb quang sang \u0111i\u1ec7n r\u1ed3i l\u1ea1i t\u1eeb \u0111i\u1ec7n sang quang. \u0110i\u1ec1u n\u00e0y khi\u1ebfn OEO tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u0111\u00fang \u0111\u1eafn khi t\u00edn hi\u1ec7u \u0111\u00e3 v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p b\u00f9 tr\u1eeb ho\u1eb7c khu\u1ebfch \u0111\u1ea1i \u0111\u01a1n thu\u1ea7n.<\/p>\n\n\n\n

S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c ti\u1ec5n<\/h3>\n\n\n\n
\n\n<\/colgroup>

Danh m\u1ee5c<\/p><\/th>

OEO
<\/strong><\/p><\/th>

DCM
<\/strong><\/p><\/th>

EDFA<\/strong><\/p><\/th><\/tr>

T\u00ean \u0111\u1ea7y \u0111\u1ee7<\/strong><\/p><\/td>

Quang\u2013\u0110i\u1ec7n\u2013Quang<\/p><\/td>

M\u00f4-\u0111un b\u00f9 t\u00e1n s\u1eafc<\/p><\/td>

B\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha t\u1ea1p erbium (Erbium-Doped Fiber Amplifier)<\/p><\/td><\/tr>

Ch\u1ee9c n\u0103ng ch\u00ednh<\/strong><\/p><\/td>

T\u00e1i t\u1ea1o t\u00edn hi\u1ec7u (3R: t\u00e1i khu\u1ebfch \u0111\u1ea1i, t\u00e1i \u0111\u1ecbnh d\u1ea1ng, t\u00e1i \u0111\u1ed3ng b\u1ed9 th\u1eddi gian)<\/p><\/td>

B\u00f9 t\u00e1n s\u1eafc<\/p><\/td>

Khu\u1ebfch \u0111\u1ea1i quang<\/p><\/td><\/tr>

V\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft<\/strong><\/p><\/td>

Suy gi\u1ea3m t\u00edn hi\u1ec7u nghi\u00eam tr\u1ecdng (nhi\u1ec5u, m\u00e9o d\u1ea1ng, l\u1ed7i th\u1eddi gian)<\/p><\/td>

T\u00e1n s\u1eafc s\u1eafc chromatic (lan r\u1ed9ng xung)<\/p><\/td>

Suy hao t\u00edn hi\u1ec7u (m\u1ea5t c\u00f4ng su\u1ea5t)<\/p><\/td><\/tr>

Mi\u1ec1n ho\u1ea1t \u0111\u1ed9ng<\/strong><\/p><\/td>

\u0110i\u1ec7n + Quang<\/p><\/td>

Quang h\u1ecdc<\/p><\/td>

Quang h\u1ecdc<\/p><\/td><\/tr>

Chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u<\/strong><\/p><\/td>

C\u00f3 (Q \u2192 \u0110 \u2192 Q)<\/p><\/td>

No<\/p><\/td>

No<\/p><\/td><\/tr>

Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/strong><\/p><\/td>

C\u00e1c tr\u1ea1m t\u00e1i t\u1ea1o \u0111\u01b0\u1eddng d\u00e0i, m\u1ea1ng DWDM c\u0169<\/p><\/td>

C\u00e1c li\u00ean k\u1ebft s\u1ee3i quang kho\u1ea3ng c\u00e1ch xa, c\u0169 Kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/a>\/Y\u00eau c\u1ea7u c\u00e1p s\u1ee3i quang v\u00e0 c\u00f3 th\u1ec3 \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u cao h\u01a1n, nh\u01b0ng m\u1edf r\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n cho s\u1ef1 ph\u00e1t tri\u1ec3n m\u1ea1ng trong t\u01b0\u01a1ng lai.<\/a> c\u00e1c h\u1ec7 th\u1ed1ng DWDM<\/p><\/td>

Khu\u1ebfch \u0111\u1ea1i n\u1ed9i tuy\u1ebfn trong c\u00e1c m\u1ea1ng DWDM v\u00e0 metro<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

M\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 ghi nh\u1edb s\u1ef1 ph\u00e2n chia n\u00e0y nh\u01b0 sau: DCM kh\u1eafc ph\u1ee5c h\u00ecnh d\u1ea1ng, EDFA kh\u1eafc ph\u1ee5c \u0111\u1ed9 m\u1ea1nh, c\u00f2n OEO kh\u1eafc ph\u1ee5c c\u1ea3 ch\u1ea5t l\u01b0\u1ee3ng l\u1eabn th\u1eddi gian b\u1eb1ng c\u00e1ch t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u.<\/strong> \u0110\u00f3 l\u00e0 l\u00fd do v\u00ec sao ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau trong c\u00f9ng m\u1ed9t thi\u1ebft k\u1ebf v\u1eadn chuy\u1ec3n quang.<\/p>\n\n\n\n

\ud83d\udfe7 M\u1ed1i quan h\u1ec7 gi\u1eefa OEO v\u00e0 c\u00e1c module thu ph\u00e1t quang (optical transceivers) l\u00e0 g\u00ec?<\/h2>\n\n\n\n

M\u1ed1i quan h\u1ec7 \u0111\u00f3 l\u00e0 b\u1ed9 thu ph\u00e1t quang<\/a> th\u01b0\u1eddng l\u00e0 ph\u1ea7n c\u1ee9ng l\u00e0m cho OEO tr\u1edf n\u00ean kh\u1ea3 thi, nh\u01b0ng b\u1ea3n th\u00e2n OEO l\u00e0 qu\u00e1 tr\u00ecnh t\u00e1i t\u1ea1o, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u00ean g\u1ecdi c\u1ee7a module. T\u00e0i li\u1ec7u DWDM c\u1ee7a Cisco n\u00eau r\u00f5 c\u00e1c card TXP v\u00e0 MXP th\u1ef1c hi\u1ec7n chuy\u1ec3n \u0111\u1ed5i OEO, ngh\u0129a l\u00e0 card nh\u1eadn \u0111\u1ea7u v\u00e0o quang, x\u1eed l\u00fd \u0111i\u1ec7n t\u1eed v\u00e0 xu\u1ea5t \u0111\u1ea7u ra quang tr\u1edf l\u1ea1i.<\/p>\n\n\n\n

\"What<\/figure>\n\n\n\n

Module thu ph\u00e1t l\u00e0 giao di\u1ec7n, OEO l\u00e0 qu\u00e1 tr\u00ecnh<\/h3>\n\n\n\n

M\u1ed9t m\u00f4-\u0111un quang<\/a> l\u00e0 giao di\u1ec7n v\u1eadt l\u00fd th\u1ef1c hi\u1ec7n chuy\u1ec3n \u0111\u1ed5i t\u1eeb quang sang \u0111i\u1ec7n v\u00e0 t\u1eeb \u0111i\u1ec7n sang quang. OEO m\u00f4 t\u1ea3 vi\u1ec7c h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng kh\u1ea3 n\u0103ng \u0111\u00f3 nh\u01b0 th\u1ebf n\u00e0o khi \u00e1p d\u1ee5ng cho t\u00e1i t\u1ea1o. N\u00f3i c\u00e1ch kh\u00e1c, module thu ph\u00e1t l\u00e0 c\u00f4ng c\u1ee5, c\u00f2n OEO l\u00e0 ch\u1ee9c n\u0103ng \u0111ang \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n.<\/p>\n\n\n\n

V\u00ec sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng trong thi\u1ebft k\u1ebf m\u1ea1ng<\/strong><\/p>\n\n\n\n

S\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y quan tr\u1ecdng v\u00ec kh\u00f4ng ph\u1ea3i m\u1ecdi module thu ph\u00e1t \u0111\u1ec1u \u0111\u01b0\u1ee3c d\u00f9ng cho t\u00e1i t\u1ea1o. M\u1ed9t s\u1ed1 ch\u1ec9 \u0111\u01a1n thu\u1ea7n chuy\u1ec3n d\u1eef li\u1ec7u gi\u1eefa mi\u1ec1n \u0111i\u1ec7n v\u00e0 mi\u1ec1n quang \u1edf r\u00eca m\u1ea1ng. Trong c\u00e1c ki\u1ebfn tr\u00fac d\u1ef1a tr\u00ean OEO, kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i t\u01b0\u01a1ng t\u1ef1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch c\u00f3 ch\u1ee7 \u0111\u00edch nh\u1eb1m l\u00e0m s\u1ea1ch t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi ti\u1ebfp t\u1ee5c truy\u1ec1n \u0111i.<\/p>\n\n\n\n

N\u01a1i module thu ph\u00e1t v\u00e0 OEO tr\u00f9ng l\u1eb7p<\/h3>\n\n\n\n

Trong c\u00e1c t\u1ee7 t\u00e1i t\u1ea1o, c\u00e1c card v\u1eadn chuy\u1ec3n v\u00e0 m\u1ed9t s\u1ed1 n\u1ec1n t\u1ea3ng DWDM nh\u1ea5t \u0111\u1ecbnh, giai \u0111o\u1ea1n module thu ph\u00e1t l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng l\u1edbn h\u01a1n th\u1ef1c hi\u1ec7n t\u00e1i t\u1ea1o OEO. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn DWDM coherent 100G c\u0169ng cho th\u1ea5y vi\u1ec7c t\u00e1i t\u1ea1o OTU-4 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo c\u1ea5u h\u00ecnh hai card n\u1ed1i ti\u1ebfp, kh\u1eb3ng \u0111\u1ecbnh th\u00eam r\u1eb1ng OEO th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai b\u00ean trong c\u00e1c thi\u1ebft b\u1ecb v\u1eadn chuy\u1ec3n t\u1ed5ng h\u1ee3p h\u01a1n l\u00e0 d\u01b0\u1edbi d\u1ea1ng h\u1ed9p \u0111\u1ed9c l\u1eadp.<\/p>\n\n\n\n

\ud83d\udfe7 OEO v\u1eabn c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng quang hi\u1ec7n \u0111\u1ea1i hay kh\u00f4ng?<\/h2>\n\n\n\n

C\u00f3, nh\u01b0ng m\u1ee9c \u0111\u1ed9 s\u1eed d\u1ee5ng \u00edt h\u01a1n tr\u01b0\u1edbc \u0111\u00e2y. C\u00e1c h\u1ec7 th\u1ed1ng quang coherent hi\u1ec7n \u0111\u1ea1i ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o vi\u1ec7c b\u00f9 tr\u1eeb suy hao nh\u1edd x\u1eed l\u00fd t\u00edn hi\u1ec7u s\u1ed1 (DSP), v\u1ed1n c\u00f3 th\u1ec3 x\u1eed l\u00fd t\u00e1n s\u1eafc v\u00e0 c\u00e1c d\u1ea1ng m\u00e9o kh\u00e1c trong mi\u1ec1n k\u1ef9 thu\u1eadt s\u1ed1. T\u00e0i li\u1ec7u v\u1ec1 quang coherent c\u1ee7a Juniper n\u00eau r\u1eb1ng DSP \u00e1p d\u1ee5ng c\u00e1c b\u1ed9 l\u1ecdc to\u00e1n h\u1ecdc ngh\u1ecbch \u0111\u1ea3o \u0111\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c t\u00e1n s\u1eafc s\u1eafc chromatic v\u00e0 c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf nhu c\u1ea7u s\u1eed d\u1ee5ng DCM v\u1eadt l\u00fd tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n.<\/p>\n\n\n\n

\"Is<\/figure>\n\n\n\n

Quang coherent l\u00e0m gi\u1ea3m nhu c\u1ea7u s\u1eed d\u1ee5ng OEO<\/h3>\n\n\n\n

Quang coherent \u0111\u00e3 thay \u0111\u1ed5i thi\u1ebft k\u1ebf c\u1ee7a nhi\u1ec1u h\u1ec7 th\u1ed1ng DWDM v\u00ec DSP c\u00f3 th\u1ec3 b\u00f9 tr\u1eeb nhi\u1ec1u suy hao v\u1ed1n tr\u01b0\u1edbc \u0111\u00e2y \u0111\u00f2i h\u1ecfi t\u00e1i t\u1ea1o v\u1eadt l\u00fd ho\u1eb7c ph\u1ea7n c\u1ee9ng b\u00f9 t\u00e1n s\u1eafc. Juniper l\u01b0u \u00fd r\u1eb1ng quang coherent c\u00f3 th\u1ec3 b\u00f9 tr\u1eeb l\u01b0\u1ee3ng t\u00e1n s\u1eafc s\u1eafc chromatic l\u1edbn, trong khi Nokia gi\u1ea3i th\u00edch r\u1eb1ng DSP coherent cho ph\u00e9p b\u00f9 tr\u1eeb k\u1ef9 thu\u1eadt s\u1ed1 c\u00e1c suy hao m\u1ea1ng, bao g\u1ed3m c\u1ea3 t\u00e1n s\u1eafc s\u1eafc chromatic v\u00e0 PMD.<\/p>\n\n\n\n

Nh\u01b0ng OEO Ch\u01b0a Bi\u1ebfn M\u1ea5t<\/h3>\n\n\n\n

Ngay c\u1ea3 v\u1edbi c\u00f4ng ngh\u1ec7 coherent, OEO v\u1eabn xu\u1ea5t hi\u1ec7n trong m\u1ed9t s\u1ed1 m\u1ea1ng n\u01a1i t\u00edn hi\u1ec7u b\u1ecb suy gi\u1ea3m qu\u00e1 m\u1ee9c, n\u01a1i ki\u1ebfn tr\u00fac d\u1ef1a tr\u00ean h\u1ec7 th\u1ed1ng c\u0169, ho\u1eb7c n\u01a1i vi\u1ec7c t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c \u01b0u ti\u00ean h\u01a1n c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ch\u1ec9 s\u1eed d\u1ee5ng quang h\u1ecdc ph\u1ee9c t\u1ea1p h\u01a1n. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn v\u1ec1 b\u1ed9 t\u00e1i t\u1ea1o c\u1ee7a Cisco v\u00e0 c\u00e1c t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn v\u1eadn chuy\u1ec3n v\u1eabn coi OEO l\u00e0 m\u1ed9t ch\u1ee9c n\u0103ng m\u1ea1ng h\u1ee3p l\u1ec7 \u0111\u1ec3 t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u.<\/p>\n\n\n\n

Quy t\u1eafc th\u1ef1c ti\u1ec5n hi\u1ec7n \u0111\u1ea1i<\/strong><\/p>\n\n\n\n

N\u1ebfu li\u00ean k\u1ebft c\u00f3 th\u1ec3 x\u1eed l\u00fd \u0111\u01b0\u1ee3c b\u1eb1ng DSP coherent, th\u00ec \u0111\u00f3 th\u01b0\u1eddng l\u00e0 c\u00e1ch ti\u1ebfp c\u1eadn s\u1ea1ch h\u01a1n. N\u1ebfu t\u00edn hi\u1ec7u ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng l\u1ea1i ho\u00e0n to\u00e0n t\u1ea1i \u0111i\u1ec3m t\u00e1i t\u1ea1o, OEO v\u1eabn c\u00f2n h\u1eefu \u00edch. \u0110\u00f3 l\u00e0 l\u00fd do v\u00ec sao OEO hi\u1ec7n nay \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng ch\u1ecdn l\u1ecdc h\u01a1n, nh\u01b0ng v\u1eabn mang t\u00ednh k\u1ef9 thu\u1eadt quan tr\u1ecdng.<\/p>\n\n\n\n

\ud83d\udfe7 L\u1ee3i \u00edch v\u00e0 H\u1ea1n ch\u1ebf c\u1ee7a T\u00e1i t\u1ea1o OEO<\/h2>\n\n\n\n

L\u1ee3i \u00edch l\u1edbn nh\u1ea5t c\u1ee7a t\u00e1i t\u1ea1o OEO l\u00e0 kh\u1ea3 n\u0103ng kh\u00f4i ph\u1ee5c t\u00edn hi\u1ec7u quang b\u1ecb suy gi\u1ea3m m\u1ed9t c\u00e1ch to\u00e0n di\u1ec7n h\u01a1n so v\u1edbi khu\u1ebfch \u0111\u1ea1i quang h\u1ecdc ho\u1eb7c b\u00f9 t\u00e1n s\u1eafc ri\u00eang l\u1ebb. H\u01b0\u1edbng d\u1eabn t\u00e1i t\u1ea1o c\u1ee7a Cisco m\u00f4 t\u1ea3 OEO nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u00e1i t\u1ea1o c\u00e1c t\u00edn hi\u1ec7u quang y\u1ebfu v\u00e0 m\u00e9o d\u1ea1ng th\u00f4ng qua t\u00e1i khu\u1ebfch \u0111\u1ea1i, t\u00e1i t\u1ea1o v\u00e0 \u0111\u1ed3ng b\u1ed9 l\u1ea1i th\u1eddi gian \u2014 \u0111i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 \u0111\u1eb7c bi\u1ec7t hi\u1ec7u qu\u1ea3 trong vi\u1ec7c ph\u00e1 v\u1ee1 chu\u1ed7i suy hao trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n

\"Benefits<\/figure>\n\n\n\n

C\u00e1c l\u1ee3i \u00edch ch\u00ednh<\/h3>\n\n\n\n

OEO c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u, m\u1edf r\u1ed9ng ph\u1ea1m vi truy\u1ec1n d\u1eabn v\u00e0 cho ph\u00e9p m\u1ea1ng ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng khi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u1ec9 d\u00f9ng quang h\u1ecdc kh\u00f4ng c\u00f2n \u0111\u1ee7 hi\u1ec7u l\u1ef1c. Ngo\u00e0i ra, OEO cung c\u1ea5p cho k\u1ef9 s\u01b0 m\u1ea1ng m\u1ed9t \u0111i\u1ec3m t\u00e1i t\u1ea1o m\u1ea1nh m\u1ebd, n\u01a1i h\u1ecd c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c l\u1ea1i th\u1eddi gian v\u00e0 lo\u1ea1i b\u1ecf \u0111\u1ed9 m\u00e9o t\u00edch l\u0169y tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u \u0111o\u1ea1n c\u00e1p ti\u1ebfp theo.<\/p>\n\n\n\n

C\u00e1c H\u1ea1n ch\u1ebf Ch\u00ednh<\/h3>\n\n\n\n

\u0110\u1ed5i l\u1ea1i l\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p. OEO y\u00eau c\u1ea7u x\u1eed l\u00fd \u0111i\u1ec7n t\u1eed, l\u00e0m t\u0103ng chi ph\u00ed, ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 t\u1ea3i thi\u1ebft b\u1ecb so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ee5 \u0111\u1ed9ng ho\u1eb7c to\u00e0n quang. N\u00f3 c\u0169ng \u00edt h\u1ea5p d\u1eabn h\u01a1n trong c\u00e1c h\u1ec7 th\u1ed1ng coherent hi\u1ec7n \u0111\u1ea1i, n\u01a1i DSP c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n nhi\u1ec1u t\u00e1c v\u1ee5 b\u00f9 suy hao m\u00e0 kh\u00f4ng c\u1ea7n m\u1ed9t tr\u1ea1m t\u00e1i t\u1ea1o ri\u00eang bi\u1ec7t. T\u00e0i li\u1ec7u c\u1ee7a Juniper n\u00eau r\u00f5 r\u1eb1ng DSP \u0111\u00e3 \u0111\u1ea3m nh\u1eadn ph\u1ea7n l\u1edbn nhi\u1ec7m v\u1ee5 b\u00f9 t\u00e1n s\u1eafc trong quang h\u1ecdc \u0111\u01b0\u01a1ng \u0111\u1ea1i.<\/p>\n\n\n\n

C\u00e1c Tr\u01b0\u1eddng H\u1ee3p S\u1eed D\u1ee5ng Ph\u00f9 H\u1ee3p Nh\u1ea5t<\/h3>\n\n\n\n

OEO th\u00edch h\u1ee3p nh\u1ea5t trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p m\u1ea1ng c\u1ea7n t\u00e1i t\u1ea1o \u0111\u1ea7y \u0111\u1ee7 thay v\u00ec ch\u1ec9 hi\u1ec7u ch\u1ec9nh \u0111\u01a1n gi\u1ea3n. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m c\u00e1c tr\u1ea1m t\u00e1i t\u1ea1o \u0111\u01b0\u1eddng d\u00e0i, c\u00e1c h\u1ec7 th\u1ed1ng DWDM c\u0169 v\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng m\u00e0 nhi\u1ec1u lo\u1ea1i suy hao \u0111\u00e3 t\u00edch l\u0169y v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng kh\u1eafc ph\u1ee5c c\u1ee7a khu\u1ebfch \u0111\u1ea1i ho\u1eb7c b\u00f9 t\u00e1n s\u1eafc.<\/p>\n\n\n\n

\ud83d\udfe7 K\u1ebft lu\u1eadn: OEO trong M\u1ea1ng Quang \u2014 Khi N\u00e0o v\u00e0 V\u00ec Sao N\u00f3 V\u1eabn C\u00f2n Quan Tr\u1ecdng<\/h2>\n\n\n\n

OEO (Quang\u2013\u0110i\u1ec7n\u2013Quang)<\/strong> l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng truy\u1ec1n th\u00f4ng quang \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i c\u00e1c t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng b\u1ecb suy gi\u1ea3m sang d\u1ea1ng \u0111i\u1ec7n, x\u1eed l\u00fd ch\u00fang v\u00e0 sau \u0111\u00f3 ph\u00e1t l\u1ea1i d\u01b0\u1edbi d\u1ea1ng t\u00edn hi\u1ec7u quang s\u1ea1ch. \u0110\u00e2y l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i trong DWDM v\u00e0 v\u1eadn chuy\u1ec3n \u0111\u01b0\u1eddng d\u00e0i v\u00ec n\u00f3 gi\u1ea3i quy\u1ebft m\u1ed9t v\u1ea5n \u0111\u1ec1 kh\u00e1c bi\u1ec7t so v\u1edbi DCM ho\u1eb7c EDFA: n\u00f3 t\u00e1i x\u00e2y d\u1ef1ng ch\u00ednh t\u00edn hi\u1ec7u. T\u00e0i li\u1ec7u v\u1eadn chuy\u1ec3n c\u1ee7a Cisco cho th\u1ea5y OEO \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i c\u00e1c tr\u1ea1m t\u00e1i t\u1ea1o, trong khi Juniper v\u00e0 Nokia tr\u00ecnh b\u00e0y c\u00e1ch DSP coherent \u0111\u00e3 l\u00e0m gi\u1ea3m nhu c\u1ea7u v\u1ec1 t\u00e1i t\u1ea1o v\u1eadt l\u00fd trong nhi\u1ec1u thi\u1ebft k\u1ebf hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n

\"OEO<\/figure>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng c\u0169 v\u00e0 c\u00e1c li\u00ean k\u1ebft \u0111\u01b0\u1eddng d\u00e0i kh\u00f3 kh\u0103n, OEO v\u1eabn l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p th\u1ef1c t\u1ebf v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u1eefng ch\u1eafc. \u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng m\u1edbi h\u01a1n, n\u00f3 ng\u00e0y c\u00e0ng b\u1ecb thay th\u1ebf b\u1edfi quang h\u1ecdc coherent \u0111i\u1ec1u khi\u1ec3n b\u1edfi DSP. Vi\u1ec7c hi\u1ec3u r\u00f5 s\u1ef1 chuy\u1ec3n d\u1ecbch n\u00e0y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu n\u1ebfu b\u1ea1n mu\u1ed1n \u0111\u1ecdc \u0111\u00fang ki\u1ebfn tr\u00fac m\u1ea1ng quang, so s\u00e1nh ch\u00ednh x\u00e1c c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 l\u1ef1a ch\u1ecdn chi\u1ebfn l\u01b0\u1ee3c t\u00e1i t\u1ea1o ph\u00f9 h\u1ee3p cho m\u1ed9t li\u00ean k\u1ebft c\u1ee5 th\u1ec3.<\/p>\n\n\n\n

B\u1ea1n \u0111ang t\u00ecm c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 gi\u1ea3i ph\u00e1p quang h\u1ecdc \u0111\u00e1ng tin c\u1eady cho m\u1ea1ng DWDM ho\u1eb7c m\u1ea1ng s\u1ee3i quang c\u1ee7a m\u00ecnh? Kh\u00e1m ph\u00e1 C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a> \u0111\u1ec3 t\u00ecm c\u00e1c s\u1ea3n ph\u1ea9m module quang
<\/a> v\u00e0 k\u1ebft n\u1ed1i ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho \u1ee9ng d\u1ee5ng vi\u1ec5n th\u00f4ng v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u.<\/p>","protected":false},"excerpt":{"rendered":"

T\u00ecm hi\u1ec3u OEO ngh\u0129a l\u00e0 g\u00ec trong truy\u1ec1n th\u00f4ng quang, c\u00e1ch t\u00e1i t\u1ea1o quang-\u0111i\u1ec7n-quang ho\u1ea1t \u0111\u1ed9ng ra sao v\u00e0 khi n\u00e0o n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ng DWDM v\u00e0 li\u00ean k\u1ebft quang.<\/p>\n

T\u1eeb kh\u00f3a:<\/p>","protected":false},"author":1,"featured_media":2468,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[26],"class_list":["post-2469","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\/2469","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=2469"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2469\/revisions"}],"predecessor-version":[{"id":10709,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2469\/revisions\/10709"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2468"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}