{"id":3515,"date":"2025-04-18T08:39:01","date_gmt":"2025-04-18T08:39:01","guid":{"rendered":"https:\/\/commmesh.com\/?p=3515"},"modified":"2025-04-18T10:00:25","modified_gmt":"2025-04-18T10:00:25","slug":"fibre-optic-signal-loss-and-attenuation","status":"publish","type":"post","link":"https:\/\/commmesh.com\/vi\/fibre-optic-signal-loss-and-attenuation\/","title":{"rendered":"M\u1ea5t m\u00e1t v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u s\u1ee3i quang"},"content":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi t\u1ea1i sao k\u1ebft n\u1ed1i internet c\u1ee7a b\u1ea1n \u0111\u00f4i khi ch\u1eadm h\u01a1n mong \u0111\u1ee3i, ngay c\u1ea3 v\u1edbi k\u1ebft n\u1ed1i si\u00eau nhanh ch\u01b0a? c\u00e1p quang<\/em>? C\u00e2u tr\u1ea3 l\u1eddi th\u01b0\u1eddng n\u1eb1m \u1edf m\u1ea5t t\u00edn hi\u1ec7u<\/em> V\u00e0 suy gi\u1ea3m trong s\u1ee3i quang<\/em>. Nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c d\u1eef li\u1ec7u di chuy\u1ec3n t\u1ed1t nh\u01b0 th\u1ebf n\u00e0o qua c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn m\u1ecdi th\u1ee9 t\u1eeb cu\u1ed9c g\u1ecdi video \u0111\u1ebfn \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y. Trong h\u01b0\u1edbng d\u1eabn d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u n\u00e0y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 nguy\u00ean nh\u00e2n m\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00e1p quang<\/em>, l\u1eb7n v\u00e0o c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em> gi\u1ed1ng t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em>, V\u00e0 t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>. Ch\u00fang t\u00f4i s\u1ebd gi\u1eef cho n\u00f3 \u0111\u01a1n gi\u1ea3n v\u00e0 h\u1ea5p d\u1eabn, \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u c\u00e1ch suy gi\u1ea3m trong s\u1ee3i quang<\/em> ho\u1ea1t \u0111\u1ed9ng v\u00e0 t\u1ea1i sao n\u00f3 quan tr\u1ecdng. V\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p t\u1eeb CommMesh, ch\u00fang ta h\u00e3y l\u00e0m s\u00e1ng t\u1ecf c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> v\u00e0 gi\u1ea3i quy\u1ebft m\u1ea5t t\u00edn hi\u1ec7u<\/em> tr\u1ef1c di\u1ec7n!<\/p>\n\n\n\n\n\n

M\u1ea5t v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u trong c\u00e1p quang l\u00e0 g\u00ec?<\/h2>\n\n\n\n

\u0110\u1ecbnh ngh\u0129a m\u1ea5t m\u00e1t v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u<\/h3>\n\n\n\n

M\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00e1p quang<\/em> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn s\u1ef1 gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng khi n\u00f3 truy\u1ec1n qua s\u1ee3i quang, th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o nh\u01b0 suy gi\u1ea3m trong s\u1ee3i quang<\/em>. S\u1ef1 suy gi\u1ea3m trong s\u1ee3i quang<\/em> l\u00e0 s\u1ef1 suy y\u1ebfu d\u1ea7n d\u1ea7n c\u1ee7a t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng, \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng decibel tr\u00ean kilomet (dB\/km). S\u1ef1 m\u1ea5t m\u00e1t n\u00e0y l\u00e0 do nhi\u1ec1u nguy\u00ean nh\u00e2n kh\u00e1c nhau c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em>, bao g\u1ed3m t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em>, V\u00e0 t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>, m\u00e0 ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 chi ti\u1ebft trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

\"M\u1ea5t<\/a>
M\u1ea5t m\u00e1t v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u s\u1ee3i quang<\/figcaption><\/figure>\n\n\n\n

T\u1ea1i sao vi\u1ec7c h\u1ecdc suy gi\u1ea3m l\u1ea1i quan tr\u1ecdng trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/h3>\n\n\n\n

S\u1ef1 suy gi\u1ea3m trong s\u1ee3i quang<\/em> r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 quy\u1ebft \u0111\u1ecbnh t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 truy\u1ec1n \u0111i bao xa tr\u01b0\u1edbc khi c\u1ea7n khu\u1ebfch \u0111\u1ea1i. Cao m\u1ea5t t\u00edn hi\u1ec7u<\/em> c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t trong c\u00e1p quang<\/em>, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 m\u1ea1ng vi\u1ec5n th\u00f4ng v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u. Hi\u1ec3u bi\u1ebft c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em> gi\u00fap c\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng t\u1ed1t h\u01a1n \u0111\u1ec3 gi\u1ea3m thi\u1ec3u suy gi\u1ea3m trong s\u1ee3i quang<\/em> v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u00e1ng tin c\u1eady m\u1ea5t t\u00edn hi\u1ec7u<\/em> s\u1ef1 qu\u1ea3n l\u00fd.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn g\u00e2y m\u1ea5t t\u00edn hi\u1ec7u<\/h3>\n\n\n\n

M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 g\u00f3p ph\u1ea7n v\u00e0o m\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00e1p quang<\/em>, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 m\u1ed9t lo\u1ea1i t\u1ed5n th\u1ea5t. Ch\u00fang bao g\u1ed3m t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> (\u00e1nh s\u00e1ng b\u1ecb t\u00e1n x\u1ea1 do kh\u00f4ng ho\u00e0n h\u1ea3o), t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> (\u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 b\u1edfi v\u1eadt li\u1ec7u s\u1ee3i), t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> (t\u00edn hi\u1ec7u lan truy\u1ec1n theo th\u1eddi gian) v\u00e0 t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> (\u00e1nh s\u00e1ng tho\u00e1t ra do u\u1ed1n cong \u0111\u1ed9t ng\u1ed9t). M\u1ed7i th\u1ee9 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 trong suy gi\u1ea3m trong s\u1ee3i quang<\/em> \u1edf trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

C\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/h2>\n\n\n\n

T\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/h3>\n\n\n\n

T\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> x\u1ea3y ra khi c\u00e1c h\u1ea1t \u00e1nh s\u00e1ng b\u1ecb l\u1ec7ch h\u01b0\u1edbng b\u1edfi nh\u1eefng khi\u1ebfm khuy\u1ebft nh\u1ecf ho\u1eb7c t\u1ea1p ch\u1ea5t trong l\u00f5i s\u1ee3i. S\u1ef1 t\u00e1n x\u1ea1 n\u00e0y, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u00e1n x\u1ea1 Rayleigh, l\u00e0 t\u00e1c nh\u00e2n ch\u00ednh g\u00e2y ra suy gi\u1ea3m trong s\u1ee3i quang<\/em>. TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> r\u00f5 r\u1ec7t h\u01a1n \u1edf b\u01b0\u1edbc s\u00f3ng ng\u1eafn h\u01a1n, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong m\u1ea5t t\u00edn hi\u1ec7u<\/em> v\u00ec c\u00e1p quang<\/em> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giao ti\u1ebfp \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n g\u00e2y ra t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> ph\u00e1t sinh t\u1eeb nh\u1eefng bi\u1ebfn \u0111\u1ed5i vi m\u00f4 trong c\u1ea5u tr\u00fac th\u1ee7y tinh ho\u1eb7c v\u1eadt li\u1ec7u pha t\u1ea1p trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t. Nh\u1eefng b\u1ea5t th\u01b0\u1eddng n\u00e0y khi\u1ebfn \u00e1nh s\u00e1ng ph\u00e2n t\u00e1n theo c\u00e1c h\u01b0\u1edbng ng\u1eabu nhi\u00ean, l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u trong c\u00e1p quang<\/em>. Vi\u1ec7c gi\u1ea3m thi\u1ec3u nh\u1eefng khi\u1ebfm khuy\u1ebft n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> \u0111\u1ec3 gi\u1ea3m m\u1ea5t t\u00edn hi\u1ec7u<\/em> t\u1eeb t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u<\/h4>\n\n\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng trong ch\u1eb7ng \u0111\u01b0\u1eddng d\u00e0i c\u00e1p quang<\/em>, n\u01a1i m\u00e0 ngay c\u1ea3 nh\u1eefng t\u1ed5n th\u1ea5t nh\u1ecf c\u0169ng t\u00edch t\u1ee5 theo kho\u1ea3ng c\u00e1ch, t\u0103ng l\u00ean suy gi\u1ea3m trong s\u1ee3i quang<\/em>. TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, c\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao \u0111\u1ec3 gi\u1ea3m t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em>, \u0111\u1ea3m b\u1ea3o t\u1ed1t h\u01a1n m\u1ea5t t\u00edn hi\u1ec7u<\/em> hi\u1ec7u su\u1ea5t cho truy\u1ec1n d\u1eef li\u1ec7u<\/em>.<\/p>\n\n\n\n

S\u1ef1 m\u1ea5t m\u00e1t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/h3>\n\n\n\n

T\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> x\u1ea3y ra khi v\u1eadt li\u1ec7u s\u1ee3i h\u1ea5p th\u1ee5 m\u1ed9t ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng, chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh nhi\u1ec7t. \u0110\u00e2y l\u00e0 m\u1ed9t nguy\u00ean nh\u00e2n ch\u00ednh kh\u00e1c c\u1ee7a suy gi\u1ea3m trong s\u1ee3i quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>. T\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c t\u1ea1p ch\u1ea5t nh\u01b0 ph\u00e2n t\u1eed n\u01b0\u1edbc ho\u1eb7c ion kim lo\u1ea1i trong th\u1ee7y tinh, l\u00e0m suy y\u1ebfu t\u00edn hi\u1ec7u trong c\u00e1p quang<\/em>.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n g\u00e2y ra s\u1ef1 m\u1ea5t m\u00e1t h\u1ea5p th\u1ee5<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi c\u00e1c y\u1ebfu t\u1ed1 n\u1ed9i t\u1ea1i (t\u00ednh ch\u1ea5t t\u1ef1 nhi\u00ean c\u1ee7a th\u1ee7y tinh) v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 b\u00ean ngo\u00e0i (t\u1ea1p ch\u1ea5t b\u00ean ngo\u00e0i). V\u00ed d\u1ee5, c\u00e1c ion hydroxyl t\u1eeb \u0111\u1ed9 \u1ea9m c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng \u1edf c\u00e1c b\u01b0\u1edbc s\u00f3ng c\u1ee5 th\u1ec3, l\u00e0m t\u0103ng m\u1ea5t t\u00edn hi\u1ec7u<\/em>. TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, gi\u1ea3m t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u si\u00eau tinh khi\u1ebft cho c\u00e1p quang<\/em>.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng, g\u00f3p ph\u1ea7n suy gi\u1ea3m trong s\u1ee3i quang<\/em> tr\u00ean kho\u1ea3ng c\u00e1ch. Trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, nh\u1eefng m\u1ea5t m\u00e1t n\u00e0y c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf ph\u1ea1m vi c\u1ee7a c\u00e1p quang<\/em> kh\u00f4ng c\u00f3 b\u1ed9 l\u1eb7p, khi\u1ebfn vi\u1ec7c gi\u1ea3i quy\u1ebft tr\u1edf n\u00ean c\u1ea7n thi\u1ebft t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> cho hi\u1ec7u qu\u1ea3 m\u1ea5t t\u00edn hi\u1ec7u<\/em> s\u1ef1 qu\u1ea3n l\u00fd.<\/p>\n\n\n\n

T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/h3>\n\n\n\n

T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> x\u1ea3y ra khi c\u00e1c xung \u00e1nh s\u00e1ng lan ra khi ch\u00fang di chuy\u1ec3n, g\u00e2y ra s\u1ef1 ch\u1ed3ng ch\u00e9o v\u00e0 m\u00e9o t\u00edn hi\u1ec7u. Kh\u00f4ng gi\u1ed1ng nh\u01b0 t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> ho\u1eb7c t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> kh\u00f4ng l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u nh\u01b0ng l\u00e0m gi\u1ea3m \u0111\u1ed9 r\u00f5 n\u00e9t c\u1ee7a t\u00edn hi\u1ec7u, g\u00f3p ph\u1ea7n suy gi\u1ea3m trong s\u1ee3i quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n g\u00e2y ra t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi s\u1ef1 ph\u00e2n t\u00e1n theo ph\u01b0\u01a1ng th\u1ee9c (trong s\u1ee3i \u0111a ch\u1ebf \u0111\u1ed9) v\u00e0 s\u1ef1 ph\u00e2n t\u00e1n m\u00e0u (trong s\u1ee3i \u0111\u01a1n ch\u1ebf \u0111\u1ed9). S\u1ef1 ph\u00e2n t\u00e1n theo ph\u01b0\u01a1ng th\u1ee9c l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u00e1nh s\u00e1ng kh\u00e1c nhau trong c\u00e1p quang<\/em>, trong khi s\u1ef1 ph\u00e2n t\u00e1n m\u00e0u s\u1eafc ph\u00e1t sinh t\u1eeb 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. C\u1ea3 hai \u0111\u1ec1u t\u0103ng m\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 l\u00e0m m\u1edd truy\u1ec1n d\u1eef li\u1ec7u<\/em>, gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng v\u00e0 kho\u1ea3ng c\u00e1ch c\u1ee7a c\u00e1p quang<\/em>. TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, qu\u1ea3n l\u00fd t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao, n\u01a1i suy gi\u1ea3m trong s\u1ee3i quang<\/em> ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u.<\/p>\n\n\n\n

T\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/h3>\n\n\n\n

T\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> x\u1ea3y ra khi c\u00e1p quang<\/em> b\u1ecb u\u1ed1n cong qu\u00e1 \u0111\u1ed9t ng\u1ed9t, khi\u1ebfn \u00e1nh s\u00e1ng tho\u00e1t ra kh\u1ecfi l\u00f5i v\u00e0o l\u1edbp v\u1ecf b\u1ecdc. Lo\u1ea1i n\u00e0y m\u1ea5t t\u00edn hi\u1ec7u<\/em> l\u00e0 m\u1ed9t ng\u01b0\u1eddi \u0111\u00f3ng g\u00f3p \u0111\u00e1ng k\u1ec3 cho suy gi\u1ea3m trong s\u1ee3i quang<\/em>, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c c\u00e0i \u0111\u1eb7t m\u00e0 c\u00e1p \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn kh\u00f4ng \u0111\u00fang c\u00e1ch c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n g\u00e2y ra t\u1ed5n th\u1ea5t u\u1ed1n cong<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> \u0111\u01b0\u1ee3c g\u00e2y ra b\u1edfi s\u1ef1 u\u1ed1n cong v\u0129 m\u00f4 (nh\u1eefng \u0111\u01b0\u1eddng cong l\u1edbn c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft) v\u00e0 s\u1ef1 u\u1ed1n cong vi m\u00f4 (nh\u1eefng \u0111\u01b0\u1eddng cong nh\u1ecf do \u00e1p su\u1ea5t b\u00ean ngo\u00e0i). C\u1ea3 hai \u0111\u1ec1u ph\u00e1 v\u1ee1 s\u1ef1 ph\u1ea3n x\u1ea1 to\u00e0n ph\u1ea7n b\u00ean trong c\u00e1p quang<\/em>, t\u0103ng d\u1ea7n m\u1ea5t t\u00edn hi\u1ec7u<\/em>. X\u1eed l\u00fd c\u00e1p \u0111\u00fang c\u00e1ch trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u00e1nh t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u<\/h4>\n\n\n\n

T\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf nh\u1eefng kh\u00f4ng gian ch\u1eadt h\u1eb9p n\u01a1i c\u00e1p quang<\/em> b\u1ecb u\u1ed1n cong v\u01b0\u1ee3t qu\u00e1 b\u00e1n k\u00ednh u\u1ed1n cong t\u1ed1i thi\u1ec3u c\u1ee7a ch\u00fang. Trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, tr\u00e1nh t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> \u0111\u1ea3m b\u1ea3o th\u1ea5p h\u01a1n suy gi\u1ea3m trong s\u1ee3i quang<\/em> v\u00e0 \u0111\u00e1ng tin c\u1eady truy\u1ec1n d\u1eef li\u1ec7u<\/em>.<\/p>\n\n\n\n

\u0110o l\u01b0\u1eddng v\u00e0 qu\u1ea3n l\u00fd suy hao trong s\u1ee3i quang<\/h2>\n\n\n\n

C\u00f4ng c\u1ee5 \u0111o m\u1ea5t t\u00edn hi\u1ec7u<\/h3>\n\n\n\n

\u0110o l\u01b0\u1eddng suy gi\u1ea3m trong s\u1ee3i quang<\/em> bao g\u1ed3m c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 m\u00e1y \u0111o ph\u1ea3n x\u1ea1 mi\u1ec1n th\u1eddi gian quang h\u1ecdc (OTDR) v\u00e0 m\u00e1y \u0111o c\u00f4ng su\u1ea5t. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y \u0111\u00e1nh gi\u00e1 m\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00e1p quang<\/em> b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng, gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em> ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> ho\u1eb7c t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

K\u1ef9 thu\u1eadt gi\u1ea3m suy hao<\/h3>\n\n\n\n

Gi\u1ea3m suy gi\u1ea3m trong s\u1ee3i quang<\/em> y\u00eau c\u1ea7u gi\u1ea3i quy\u1ebft c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em>. S\u1eed d\u1ee5ng k\u00ednh c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao gi\u00fap gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> V\u00e0 t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>. C\u00e1c s\u1ee3i b\u00f9 ph\u00e2n t\u00e1n gi\u00fap qu\u1ea3n l\u00fd t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em>, trong khi c\u00e0i \u0111\u1eb7t \u0111\u00fang c\u00e1ch tr\u00e1nh t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>. Nh\u1eefng k\u1ef9 thu\u1eadt n\u00e0y t\u0103ng c\u01b0\u1eddng c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean<\/h3>\n\n\n\n

B\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean c\u00e1p quang<\/em> l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng \u0111\u1ec3 ki\u1ec3m so\u00e1t m\u1ea5t t\u00edn hi\u1ec7u<\/em>. Vi\u1ec7c v\u1ec7 sinh c\u00e1c \u0111\u1ea7u n\u1ed1i v\u00e0 ki\u1ec3m tra c\u00e1c ch\u1ed7 u\u1ed1n cong c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>, trong khi vi\u1ec7c theo d\u00f5i ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u gi\u00fap ph\u00e1t hi\u1ec7n t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> ho\u1eb7c t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>. TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>, b\u1ea3o tr\u00ec ch\u1ee7 \u0111\u1ed9ng \u0111\u1ea3m b\u1ea3o th\u1ea5p suy gi\u1ea3m trong s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

T\u00e1c \u0111\u1ed9ng c\u1ee7a m\u1ea5t t\u00edn hi\u1ec7u \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00e1p quang<\/h2>\n\n\n\n

Vi\u1ec5n th\u00f4ng<\/h3>\n\n\n\n

Trong vi\u1ec5n th\u00f4ng, m\u1ea5t t\u00edn hi\u1ec7u<\/em> t\u1eeb suy gi\u1ea3m trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c g\u1ecdi v\u00e0 t\u1ed1c \u0111\u1ed9 internet. Cao t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> ho\u1eb7c t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 y\u00eau c\u1ea7u nhi\u1ec1u b\u1ed9 l\u1eb7p h\u01a1n, l\u00e0m t\u0103ng chi ph\u00ed. Qu\u1ea3n l\u00fd c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em> \u0111\u1ea3m b\u1ea3o \u0111\u00e1ng tin c\u1eady c\u00e1p quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

Trung t\u00e2m d\u1eef li\u1ec7u<\/h3>\n\n\n\n

C\u00e1c trung t\u00e2m d\u1eef li\u1ec7u d\u1ef1a v\u00e0o m\u1ee9c th\u1ea5p suy gi\u1ea3m trong s\u1ee3i quang<\/em> \u0111\u1ec3 nhanh ch\u00f3ng truy\u1ec1n d\u1eef li\u1ec7u<\/em>. T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng, trong khi t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> t\u1eeb vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn ch\u1eb7t ch\u1ebd c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t. T\u1ed1i \u01b0u h\u00f3a c\u00e1p quang<\/em> gi\u1ea3m m\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n

M\u1ea1ng l\u01b0\u1edbi \u0111\u01b0\u1eddng d\u00e0i<\/h3>\n\n\n\n

M\u1ea1ng l\u01b0\u1edbi \u0111\u01b0\u1eddng d\u00e0i \u0111\u1eb7c bi\u1ec7t nh\u1ea1y c\u1ea3m v\u1edbi suy gi\u1ea3m trong s\u1ee3i quang<\/em>, B\u1eb0NG t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> V\u00e0 t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> t\u00edch t\u1ee5 tr\u00ean kho\u1ea3ng c\u00e1ch. Gi\u1ea3m thi\u1ec3u c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> \u0111\u1ea3m b\u1ea3o c\u00e1p quang<\/em> h\u1ed7 tr\u1ee3 k\u1ebft n\u1ed1i to\u00e0n c\u1ea7u v\u1edbi m\u1ee9c t\u1ed1i thi\u1ec3u m\u1ea5t t\u00edn hi\u1ec7u<\/em>.<\/p>\n\n\n\n

So s\u00e1nh c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/h2>\n\n\n\n

S\u1ef1 ph\u00e2n t\u00e1n so v\u1edbi s\u1ef1 m\u1ea5t m\u00e1t h\u1ea5p th\u1ee5<\/h3>\n\n\n\n

T\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> bao g\u1ed3m s\u1ef1 l\u1ec7ch h\u01b0\u1edbng \u00e1nh s\u00e1ng, trong khi t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> li\u00ean quan \u0111\u1ebfn s\u1ef1 h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng. C\u1ea3 hai \u0111\u1ec1u g\u00f3p ph\u1ea7n suy gi\u1ea3m trong s\u1ee3i quang<\/em>, Nh\u01b0ng t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> ph\u1ee5 thu\u1ed9c nhi\u1ec1u h\u01a1n v\u00e0o b\u01b0\u1edbc s\u00f3ng, trong khi t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em> ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 tinh khi\u1ebft c\u1ee7a v\u1eadt li\u1ec7u trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

Ph\u00e2n t\u00e1n so v\u1edbi t\u1ed5n th\u1ea5t u\u1ed1n cong<\/h3>\n\n\n\n

T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> l\u00e0m m\u00e9o m\u00f3 \u0111\u1ed9 r\u00f5 n\u00e9t c\u1ee7a t\u00edn hi\u1ec7u, trong khi t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u. Kh\u00f4ng gi\u1ed1ng nh\u01b0 t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em>, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn b\u0103ng th\u00f4ng, t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> c\u00f3 th\u1ec3 ph\u00f2ng ng\u1eeba \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch x\u1eed l\u00fd \u0111\u00fang c\u00e1ch c\u00e1p quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

B\u1ea3ng so s\u00e1nh: C\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/h3>\n\n\n\n

\u0110\u1ec3 l\u00e0m r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t, \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3ng \u0111\u01a1n gi\u1ea3n so s\u00e1nh c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em>:<\/p>\n\n\n\n

Lo\u1ea1i m\u1ea5t m\u00e1t<\/th>Th\u1eadt tuy\u1ec7t v\u1eddi!<\/th>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn t\u00edn hi\u1ec7u<\/th><\/tr><\/thead>
Ph\u00e2n t\u00e1n t\u1ed5n th\u1ea5t<\/td>S\u1ef1 l\u1ec7ch \u00e1nh s\u00e1ng do t\u1ea1p ch\u1ea5t<\/td>Gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u<\/td><\/tr>
S\u1ef1 m\u1ea5t m\u00e1t h\u1ea5p th\u1ee5<\/td>\u00c1nh s\u00e1ng \u0111\u01b0\u1ee3c h\u1ea5p th\u1ee5 b\u1edfi v\u1eadt li\u1ec7u<\/td>Gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u<\/td><\/tr>
T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n<\/td>T\u00edn hi\u1ec7u lan truy\u1ec1n theo th\u1eddi gian<\/td>L\u00e0m m\u00e9o t\u00edn hi\u1ec7u r\u00f5 n\u00e9t<\/td><\/tr>
T\u1ed5n th\u1ea5t u\u1ed1n cong<\/td>\u00c1nh s\u00e1ng tho\u00e1t ra do u\u1ed1n cong<\/td>Gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

B\u1ea3ng n\u00e0y n\u00eau b\u1eadt c\u00e1ch c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em> \u1ea3nh h\u01b0\u1edfng m\u1ea5t t\u00edn hi\u1ec7u<\/em> TRONG c\u00e1p quang<\/em>, h\u01b0\u1edbng d\u1eabn c\u00e1c n\u1ed7 l\u1ef1c \u0111\u1ec3 gi\u1ea3m thi\u1ec3u suy gi\u1ea3m trong s\u1ee3i quang<\/em> TRONG c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em>.<\/p>\n\n\n\n

Chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u m\u1ea5t t\u00edn hi\u1ec7u trong c\u00e1p quang<\/h2>\n\n\n\n

S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao<\/h3>\n\n\n\n

K\u00ednh c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao l\u00e0m gi\u1ea3m t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em> V\u00e0 t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>, h\u1ea1 th\u1ea5p suy gi\u1ea3m trong s\u1ee3i quang<\/em>. \u0110\u1ea7u t\u01b0 v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng c\u00e1p quang<\/em> t\u0103ng c\u01b0\u1eddng c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> hi\u1ec7u su\u1ea5t, \u0111\u1ea3m b\u1ea3o t\u1ed1i thi\u1ec3u m\u1ea5t t\u00edn hi\u1ec7u<\/em>.<\/p>\n\n\n\n

L\u1eafp \u0111\u1eb7t c\u00e1p \u0111\u00fang c\u00e1ch<\/h3>\n\n\n\n

C\u00e0i \u0111\u1eb7t \u0111\u00fang ng\u0103n ng\u1eeba t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em> b\u1eb1ng c\u00e1ch duy tr\u00ec b\u00e1n k\u00ednh u\u1ed1n cong t\u1ed1i thi\u1ec3u c\u1ee7a c\u00e1p quang<\/em>. \u0110\u1ecbnh tuy\u1ebfn c\u1ea9n th\u1eadn trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> gi\u1ea3m m\u1ea5t t\u00edn hi\u1ec7u<\/em> v\u00e0 c\u1ea3i thi\u1ec7n suy gi\u1ea3m trong s\u1ee3i quang<\/em> k\u1ebft qu\u1ea3.<\/p>\n\n\n\n

Thi\u1ebft k\u1ebf s\u1ee3i ti\u00ean ti\u1ebfn<\/h3>\n\n\n\n

M\u1edbi c\u00e1p quang<\/em> v\u1edbi \u0111\u1eb7c t\u00ednh ph\u00e2n t\u00e1n th\u1ea5p ho\u1eb7c kh\u00f4ng nh\u1ea1y c\u1ea3m v\u1edbi u\u1ed1n cong l\u00e0m gi\u1ea3m t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em> V\u00e0 t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>. Nh\u1eefng ti\u1ebfn b\u1ed9 n\u00e0y trong c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> th\u1ea5p h\u01a1n suy gi\u1ea3m trong s\u1ee3i quang<\/em> \u0111\u1ec3 t\u1ed1t h\u01a1n m\u1ea5t t\u00edn hi\u1ec7u<\/em> \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n\n\n

K\u1ebft lu\u1eadn: Gi\u1ea3i quy\u1ebft t\u00ecnh tr\u1ea1ng m\u1ea5t t\u00edn hi\u1ec7u \u0111\u1ec3 c\u00f3 k\u1ebft n\u1ed1i t\u1ed1t h\u01a1n<\/h2>\n\n\n\n

M\u1ea5t t\u00edn hi\u1ec7u<\/em> V\u00e0 suy gi\u1ea3m trong s\u1ee3i quang<\/em> c\u00f3 v\u1ebb nh\u01b0 l\u00e0 nh\u1eefng r\u00e0o c\u1ea3n nh\u1ecf, nh\u01b0ng ch\u00fang r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a ch\u00fang ta ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru. Ch\u00fang t\u00f4i \u0111\u00e3 kh\u00e1m ph\u00e1 c\u00e1c lo\u1ea1i t\u1ed5n th\u1ea5t trong s\u1ee3i quang<\/em>\u2014t\u1ed5n th\u1ea5t t\u00e1n x\u1ea1 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t h\u1ea5p th\u1ee5 trong s\u1ee3i quang<\/em>, t\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n trong s\u1ee3i quang<\/em>, V\u00e0 t\u1ed5n th\u1ea5t u\u1ed1n cong trong s\u1ee3i quang<\/em>\u2014v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang l\u00ean c\u00e1p quang<\/em>. B\u1eb1ng c\u00e1ch hi\u1ec3u v\u00e0 gi\u1ea3i quy\u1ebft nh\u1eefng m\u1ea5t m\u00e1t n\u00e0y, c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> \u0111\u1ea3m b\u1ea3o nhanh ch\u00f3ng, \u0111\u00e1ng tin c\u1eady truy\u1ec1n d\u1eef li\u1ec7u<\/em> cho m\u1ecdi th\u1ee9 t\u1eeb duy\u1ec7t internet \u0111\u1ebfn m\u1ea1ng l\u01b0\u1edbi to\u00e0n c\u1ea7u. V\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p t\u1eeb M\u1ea1ng l\u01b0\u1edbi giao ti\u1ebfp<\/a>, b\u1ea1n c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 s\u1ee3i quang<\/em> \u0111\u1ec3 gi\u1ea3m thi\u1ec3u m\u1ea5t t\u00edn hi\u1ec7u<\/em>\u2014gi\u1eef k\u1ebft n\u1ed1i r\u00f5 r\u00e0ng v\u00e0 nhanh ch\u00f3ng!<\/p>","protected":false},"excerpt":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi t\u1ea1i sao k\u1ebft n\u1ed1i internet c\u1ee7a b\u1ea1n \u0111\u00f4i khi ch\u1eadm h\u01a1n d\u1ef1 ki\u1ebfn, ngay c\u1ea3 v\u1edbi c\u00e1p quang si\u00eau nhanh ch\u01b0a? C\u00e2u tr\u1ea3 l\u1eddi th\u01b0\u1eddng n\u1eb1m \u1edf t\u00ecnh tr\u1ea1ng m\u1ea5t t\u00edn hi\u1ec7u v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u trong c\u00e1p quang. Nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch d\u1eef li\u1ec7u truy\u1ec1n qua c\u00f4ng ngh\u1ec7 c\u00e1p quang, t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn m\u1ecdi th\u1ee9 t\u1eeb cu\u1ed9c g\u1ecdi video \u0111\u1ebfn \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y. Trong h\u01b0\u1edbng d\u1eabn d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u n\u00e0y, ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 [\u2026]<\/p>","protected":false},"author":1,"featured_media":3518,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"34","_seopress_titles_title":"Fibre Optic Signal Loss and Attenuation","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[34],"tags":[],"class_list":["post-3515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/3515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/comments?post=3515"}],"version-history":[{"count":6,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/3515\/revisions"}],"predecessor-version":[{"id":3527,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/3515\/revisions\/3527"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media\/3518"}],"wp:attachment":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media?parent=3515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/categories?post=3515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/tags?post=3515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}