{"id":4333,"date":"2025-08-23T09:03:00","date_gmt":"2025-08-23T09:03:00","guid":{"rendered":"https:\/\/commmesh.com\/?p=4333"},"modified":"2025-10-11T09:01:58","modified_gmt":"2025-10-11T09:01:58","slug":"coaxial-cable-vs-fiber-optic","status":"publish","type":"post","link":"https:\/\/commmesh.com\/vi\/coaxial-cable-vs-fiber-optic\/","title":{"rendered":"C\u00e1p \u0111\u1ed3ng tr\u1ee5c so v\u1edbi c\u00e1p quang: So s\u00e1nh to\u00e0n di\u1ec7n"},"content":{"rendered":"

Trong b\u1ed1i c\u1ea3nh vi\u1ec5n th\u00f4ng v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u kh\u00f4ng ng\u1eebng ph\u00e1t tri\u1ec3n, vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0 c\u00e1p quang l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 hi\u1ec7u qu\u1ea3 chi ph\u00ed. C\u00e1p \u0111\u1ed3ng tr\u1ee5c, m\u1ed9t c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u1ed1ng v\u1edbi l\u00f5i \u0111\u1ed3ng trung t\u00e2m \u0111\u01b0\u1ee3c b\u1ecdc trong l\u1edbp v\u1ecf kim lo\u1ea1i, t\u1eeb l\u00e2u \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e1t s\u00f3ng v\u00e0 cung c\u1ea5p internet. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1p quang, m\u1ed9t k\u1ef3 quan hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng xung \u00e1nh s\u00e1ng xuy\u00ean qua c\u00e1c s\u1ee3i th\u1ee7y tinh ho\u1eb7c nh\u1ef1a, \u0111\u00e3 \u0111\u1ecbnh ngh\u0129a l\u1ea1i k\u1ebft n\u1ed1i t\u1ed1c \u0111\u1ed9 cao k\u1ec3 t\u1eeb khi \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i v\u00e0o cu\u1ed1i th\u1ebf k\u1ef7 20. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t so s\u00e1nh chuy\u00ean s\u00e2u, \u0111a chi\u1ec1u, kh\u00e1m ph\u00e1 t\u1ed1c \u0111\u1ed9, b\u0103ng th\u00f4ng, kho\u1ea3ng c\u00e1ch, chi ph\u00ed, l\u1eafp \u0111\u1eb7t, \u0111\u1ed9 b\u1ec1n, b\u1ea3o m\u1eadt, \u1ee9ng d\u1ee5ng v\u00e0 xu h\u01b0\u1edbng t\u01b0\u01a1ng lai. \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho c\u00e1c chuy\u00ean gia vi\u1ec5n th\u00f4ng, k\u1ef9 s\u01b0 m\u1ea1ng v\u00e0 nh\u00e0 ph\u00e2n ph\u1ed1i mua h\u00e0ng t\u1eeb CommMesh, b\u00e0i ph\u00e2n t\u00edch n\u00e0y t\u1eadn d\u1ee5ng nh\u1eefng hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc hi\u1ec7n t\u1ea1i c\u1ee7a ng\u00e0nh t\u00ednh \u0111\u1ebfn n\u0103m 2025, \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng cho vi\u1ec7c ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t.<\/p>\n\n\n\n\n\n

S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 thi\u1ebft k\u1ebf<\/h2>\n\n\n\n

Thi\u1ebft k\u1ebf c\u01a1 b\u1ea3n c\u1ee7a t\u1eebng lo\u1ea1i c\u00e1p s\u1ebd h\u1ed7 tr\u1ee3 c\u00e1c \u0111\u1eb7c t\u00ednh hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u, \u0111\u1ed9 ph\u1ee9c t\u1ea1p khi l\u1eafp \u0111\u1eb7t v\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n

Thi\u1ebft k\u1ebf c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

Coaxial cable comprises a central copper conductor, a dielectric insulator, a metallic shield (typically braided or foil), and an outer protective jacket. This concentric structure provides robust shielding against electromagnetic interference (EMI), reducing signal leakage to below -60 dB. Common variants include RG-6, widely used for broadband with a 75-ohm impedance and attenuation of 0.5 dB\/100 m at 1 GHz, and RG-11, designed for longer runs with slightly lower loss. The cable\u2019s diameter ranges from 6\u201312 mm, and its weight (50\u2013100 kg\/km) makes it sturdy yet less maneuverable in confined spaces. The shield, usually made of aluminum or copper, ensures signal integrity in electrically noisy environments but adds to the cable’s bulk.<\/p>\n\n\n\n

Thi\u1ebft k\u1ebf c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang c\u00f3 l\u00f5i (\u0111\u01b0\u1eddng k\u00ednh 8\u201362,5 \u03bcm) b\u1eb1ng th\u1ee7y tinh silica ho\u1eb7c nh\u1ef1a tinh khi\u1ebft cao, \u0111\u01b0\u1ee3c bao quanh b\u1edfi l\u1edbp v\u1ecf c\u00f3 chi\u1ebft su\u1ea5t th\u1ea5p h\u01a1n \u0111\u1ec3 cho ph\u00e9p ph\u1ea3n x\u1ea1 to\u00e0n ph\u1ea7n, v\u00e0 \u0111\u01b0\u1ee3c b\u1ecdc trong c\u00e1c b\u1ed9 \u0111\u1ec7m b\u1ea3o v\u1ec7, c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ecbu l\u1ef1c (v\u00ed d\u1ee5: s\u1ee3i aramid) v\u00e0 l\u1edbp v\u1ecf ngo\u00e0i. S\u1ee3i quang \u0111\u01a1n mode (9\/125 \u03bcm) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 truy\u1ec1n d\u1eabn \u0111\u01b0\u1eddng d\u00e0i, trong khi s\u1ee3i \u0111a mode<\/a> (50\/125 \u03bcm ho\u1eb7c 62,5\/125 \u03bcm) \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho c\u00e1c li\u00ean k\u1ebft ng\u1eafn h\u01a1n, b\u0103ng th\u00f4ng cao h\u01a1n. C\u00e1p c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9 (20\u201350 kg\/km) v\u00e0 m\u1ecfng (\u0111\u01b0\u1eddng k\u00ednh 2\u20135 mm), kh\u00f4ng d\u1eabn \u0111i\u1ec7n, gi\u00fap c\u00e1p kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u00e0 \u0103n m\u00f2n. Thi\u1ebft k\u1ebf n\u00e0y h\u1ed7 tr\u1ee3 tri\u1ec3n khai m\u1eadt \u0111\u1ed9 cao nh\u01b0ng \u0111\u00f2i h\u1ecfi x\u1eed l\u00fd ch\u00ednh x\u00e1c \u0111\u1ec3 tr\u00e1nh c\u00e1c v\u1ebft u\u1ed1n cong nh\u1ecf c\u00f3 th\u1ec3 g\u00e2y suy hao 0,1 dB m\u1ed7i l\u1ea7n u\u1ed1n cong.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh thi\u1ebft k\u1ebf<\/h3>\n\n\n\n

C\u1ea5u tr\u00fac kim lo\u1ea1i c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c mang l\u1ea1i kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u1ed1n c\u00f3, ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, nh\u01b0ng l\u1ea1i d\u1ec5 b\u1ecb \u0103n m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c khu v\u1ef1c \u1ea9m \u01b0\u1edbt ho\u1eb7c ven bi\u1ec3n, v\u00e0 g\u00e2y ra c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 \u0111i\u1ec7n, \u0111\u00f2i h\u1ecfi ph\u1ea3i n\u1ed1i \u0111\u1ea5t. K\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng l\u1edbn h\u01a1n (50\u2013100 kg\/km so v\u1edbi 20\u201350 kg\/km c\u1ee7a c\u00e1p quang) c\u00f3 th\u1ec3 l\u00e0m ph\u1ee9c t\u1ea1p vi\u1ec7c l\u1eafp \u0111\u1eb7t m\u1eadt \u0111\u1ed9 cao. Thi\u1ebft k\u1ebf nh\u1eb9, kh\u00f4ng d\u1eabn \u0111i\u1ec7n c\u1ee7a c\u00e1p quang lo\u1ea1i b\u1ecf nh\u1eefng lo ng\u1ea1i n\u00e0y, h\u1ed7 tr\u1ee3 t\u1edbi 288 s\u1ee3i quang tr\u00ean m\u1ed9t c\u00e1p duy nh\u1ea5t \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng quy m\u00f4 l\u1edbn. Tuy nhi\u00ean, vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1p quang \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao (th\u01b0\u1eddng suy hao <0,05 dB v\u1edbi ph\u01b0\u01a1ng ph\u00e1p h\u00e0n nhi\u1ec7t) so v\u1edbi \u0111\u1ea7u n\u1ed1i v\u1eb7n v\u00edt \u0111\u01a1n gi\u1ea3n h\u01a1n c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c (v\u00ed d\u1ee5: lo\u1ea1i F). T\u00f3m l\u1ea1i, c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u01b0\u1ee3t tr\u1ed9i trong c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 ti\u1ebft ki\u1ec7m chi ph\u00ed, d\u1ec5 b\u1ecb nhi\u1ec5u \u0111i\u1ec7n t\u1eeb, trong khi thi\u1ebft k\u1ebf c\u1ee7a c\u00e1p quang l\u1ea1i v\u01b0\u1ee3t tr\u1ed9i h\u01a1n \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i, dung l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n

So s\u00e1nh t\u1ed1c \u0111\u1ed9<\/h2>\n\n\n\n

T\u1ed1c \u0111\u1ed9, \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n d\u1eef li\u1ec7u (bit m\u1ed7i gi\u00e2y), l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 tr\u1ec5, th\u00f4ng l\u01b0\u1ee3ng v\u00e0 tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1eeb ph\u00e1t tr\u1ef1c tuy\u1ebfn video \u0111\u1ebfn trung t\u00e2m d\u1eef li\u1ec7u doanh nghi\u1ec7p.<\/p>\n\n\n\n

Kh\u1ea3 n\u0103ng t\u1ed1c \u0111\u1ed9 c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c cung c\u1ea5p t\u1ed1c \u0111\u1ed9 l\u00ean \u0111\u1ebfn 1 Gbps trong c\u00e1c c\u1ea5u h\u00ecnh b\u0103ng th\u00f4ng r\u1ed9ng th\u00f4ng th\u01b0\u1eddng, s\u1eed d\u1ee5ng \u0111i\u1ec1u ch\u1ebf t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF) \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u. C\u00e1c ti\u00eau chu\u1ea9n ti\u00ean ti\u1ebfn nh\u01b0 DOCSIS 3.1 \u0111\u1ea9y t\u1ed1c \u0111\u1ed9 l\u00fd thuy\u1ebft xu\u1ed1ng l\u00ean \u0111\u1ebfn 10 Gbps v\u00e0 l\u00ean \u0111\u1ebfn 1 Gbps, nh\u01b0ng hi\u1ec7u su\u1ea5t th\u1ef1c t\u1ebf th\u01b0\u1eddng b\u1ecb gi\u1edbi h\u1ea1n \u1edf m\u1ee9c 500\u20131000 Mbps do b\u0103ng th\u00f4ng d\u00f9ng chung v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u. V\u00ed d\u1ee5, trong c\u00e1c m\u1ea1ng internet c\u00e1p, nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng chia s\u1ebb c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng truy\u1ec1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i t\u00ecnh tr\u1ea1ng gi\u1ea3m t\u1ed1c \u0111\u1ed9 t\u1eeb 30\u201350% trong gi\u1edd cao \u0111i\u1ec3m, v\u1edbi \u0111\u1ed9 tr\u1ec5 dao \u0111\u1ed9ng t\u1eeb 20\u201350 ms. S\u1ef1 bi\u1ebfn \u0111\u1ed9ng n\u00e0y khi\u1ebfn c\u00e1p \u0111\u1ed3ng tr\u1ee5c k\u00e9m tin c\u1eady h\u01a1n trong c\u00e1c t\u00ecnh hu\u1ed1ng nhu c\u1ea7u cao, m\u1eb7c d\u00f9 v\u1eabn \u0111\u1ee7 d\u00f9ng cho nhu c\u1ea7u internet c\u01a1 b\u1ea3n.<\/p>\n\n\n\n

Kh\u1ea3 n\u0103ng t\u1ed1c \u0111\u1ed9 c\u1ee7a c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang h\u1ed7 tr\u1ee3 nhi\u1ec1u t\u1ed1c \u0111\u1ed9 kh\u00e1c nhau, b\u1eaft \u0111\u1ea7u t\u1eeb 1 Gbps cho c\u00e1p quang d\u00e2n d\u1ee5ng \u0111\u1ebfn t\u1eadn nh\u00e0 (FTTH<\/a>) thi\u1ebft l\u1eadp v\u00e0 m\u1edf r\u1ed9ng l\u00ean 100\u2013400 Gbps trong m\u00f4i tr\u01b0\u1eddng doanh nghi\u1ec7p v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u. C\u00e1p quang \u0111\u01a1n mode cho ph\u00e9p truy\u1ec1n t\u1ea3i 10 Gbps tr\u00ean kho\u1ea3ng c\u00e1ch 40 km m\u00e0 kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i, t\u1eadn d\u1ee5ng \u0111i\u1ec1u ch\u1ebf \u00e1nh s\u00e1ng \u0111\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 t\u1ea3i l\u00ean v\u00e0 t\u1ea3i xu\u1ed1ng \u0111\u1ed1i x\u1ee9ng. C\u00e1p quang \u0111a mode, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c li\u00ean k\u1ebft t\u1ea7m ng\u1eafn, c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 400 Gbps v\u1edbi \u0111\u1ed9 tr\u1ec5 th\u1ea5p (5\u201310 ms), l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c nh\u01b0 \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y v\u00e0 fronthaul 5G. Kh\u1ea3 n\u0103ng duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u tr\u00ean kho\u1ea3ng c\u00e1ch xa c\u1ee7a c\u00f4ng ngh\u1ec7 n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng t\u00ednh nh\u1ea5t qu\u00e1n v\u1ec1 t\u1ed1c \u0111\u1ed9.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh t\u1ed1c \u0111\u1ed9<\/h3>\n\n\n\n

C\u00e1p quang c\u00f3 t\u1ed1c \u0111\u1ed9 v\u01b0\u1ee3t tr\u1ed9i h\u01a1n c\u00e1p \u0111\u1ed3ng tr\u1ee5c t\u1eeb 10\u201340 l\u1ea7n, mang l\u1ea1i hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh nh\u1edd c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n chuy\u00ean d\u1ee5ng v\u00e0 suy hao t\u1ed1i thi\u1ec3u (0,2 dB\/km so v\u1edbi 0,5 dB\/100 m c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c). \u0110\u1ed1i v\u1edbi c\u00e1c t\u00e1c v\u1ee5 b\u0103ng th\u00f4ng cao nh\u01b0 ph\u00e1t tr\u1ef1c tuy\u1ebfn 4K\/8K ho\u1eb7c ch\u01a1i game tr\u1ef1c tuy\u1ebfn, c\u00e1p quang gi\u1ea3m thi\u1ec3u t\u00ecnh tr\u1ea1ng \u0111\u1ec7m l\u00ean \u0111\u1ebfn 80% v\u00e0 duy tr\u00ec \u0111\u1ed9 tr\u1ec5 th\u1ea5p, y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c tr\u00f2 ch\u01a1i c\u1ea1nh tranh (v\u00ed d\u1ee5: <10 ms). C\u00e1p \u0111\u1ed3ng tr\u1ee5c, m\u1eb7c d\u00f9 \u0111\u1ee7 d\u00f9ng cho vi\u1ec7c duy\u1ec7t web c\u01a1 b\u1ea3n ho\u1eb7c ph\u00e1t tr\u1ef1c tuy\u1ebfn \u0111\u1ed9 n\u00e9t ti\u00eau chu\u1ea9n, nh\u01b0ng l\u1ea1i g\u1eb7p kh\u00f3 kh\u0103n trong c\u00e1c h\u1ed9 gia \u0111\u00ecnh s\u1eed d\u1ee5ng nhi\u1ec1u thi\u1ebft b\u1ecb ho\u1eb7c trong th\u1eddi gian s\u1eed d\u1ee5ng cao \u0111i\u1ec3m, khi t\u1ed1c \u0111\u1ed9 c\u00f3 th\u1ec3 gi\u1ea3m \u0111\u00e1ng k\u1ec3. Trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng 5G c\u1ee7a n\u0103m 2025, l\u1ee3i th\u1ebf v\u1ec1 t\u1ed1c \u0111\u1ed9 c\u1ee7a c\u00e1p quang th\u1ec3 hi\u1ec7n r\u00f5 trong c\u00e1c m\u1ea1ng backhaul, n\u01a1i nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c t\u1ea1o ra t\u00ecnh tr\u1ea1ng t\u1eafc ngh\u1ebdn trong c\u00e1c khu v\u1ef1c \u0111\u00f4 th\u1ecb \u0111\u00f4ng \u0111\u00fac.<\/p>\n\n\n\n

So s\u00e1nh b\u0103ng th\u00f4ng<\/h2>\n\n\n\n

B\u0103ng th\u00f4ng, kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec1u lu\u1ed3ng d\u1eef li\u1ec7u c\u00f9ng l\u00fac, l\u00e0 y\u1ebfu t\u1ed1 c\u1ea7n thi\u1ebft \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng v\u00e0 \u0111\u1ed9 n\u00e9t cao.<\/p>\n\n\n\n

B\u0103ng th\u00f4ng c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c cung c\u1ea5p b\u0103ng th\u00f4ng l\u00ean \u0111\u1ebfn 1 GHz, \u0111\u1ee7 \u0111\u1ec3 truy\u1ec1n t\u1ea3i nhi\u1ec1u k\u00eanh truy\u1ec1n h\u00ecnh \u0111\u1ed9 n\u00e9t cao v\u00e0 t\u1ed1c \u0111\u1ed9 internet l\u00ean \u0111\u1ebfn 1 Gbps. Tuy nhi\u00ean, suy hao ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 t\u0103ng l\u00ean \u1edf t\u1ea7n s\u1ed1 cao h\u01a1n (v\u00ed d\u1ee5: 1 dB\/100 m \u1edf 3 GHz), v\u00e0 t\u00ednh ch\u1ea5t chia s\u1ebb c\u1ee7a c\u00e1c m\u1ea1ng c\u00e1p d\u1eabn \u0111\u1ebfn t\u1eafc ngh\u1ebdn, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong th\u1eddi gian s\u1eed d\u1ee5ng cao \u0111i\u1ec3m. H\u1ea1n ch\u1ebf n\u00e0y h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 c\u00e1c nhu c\u1ea7u b\u0103ng th\u00f4ng cao \u0111\u1ed3ng th\u1eddi.<\/p>\n\n\n\n

B\u0103ng th\u00f4ng c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang cung c\u1ea5p b\u0103ng th\u00f4ng g\u1ea7n nh\u01b0 kh\u00f4ng gi\u1edbi h\u1ea1n, h\u1ed7 tr\u1ee3 t\u1ea7n s\u1ed1 terahertz v\u1edbi dung l\u01b0\u1ee3ng l\u00ean \u0111\u1ebfn 96 Tbps trong c\u00e1c h\u1ec7 th\u1ed1ng gh\u00e9p k\u00eanh ph\u00e2n chia b\u01b0\u1edbc s\u00f3ng d\u00e0y \u0111\u1eb7c (DWDM) ti\u00ean ti\u1ebfn. C\u00e1p quang c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng h\u00e0ng tr\u0103m k\u00eanh m\u00e0 kh\u00f4ng b\u1ecb nhi\u1ec5u, l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u00f4i tr\u01b0\u1eddng y\u00eau c\u1ea7u th\u00f4ng l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn, ch\u1eb3ng h\u1ea1n nh\u01b0 trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 m\u1ea1ng \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh b\u0103ng th\u00f4ng<\/h3>\n\n\n\n

B\u0103ng th\u00f4ng c\u1ee7a c\u00e1p quang l\u1edbn h\u01a1n c\u00e1p \u0111\u1ed3ng tr\u1ee5c t\u1eeb 80\u2013100 l\u1ea7n, kh\u00f4ng g\u1eb7p v\u1ea5n \u0111\u1ec1 t\u1eafc ngh\u1ebdn \u0111\u01b0\u1eddng truy\u1ec1n d\u00f9ng chung. Trong m\u1ed9t m\u1ea1ng l\u01b0\u1edbi h\u1ed7 tr\u1ee3 100 ng\u01b0\u1eddi d\u00f9ng, c\u00e1p quang v\u1eabn duy tr\u00ec \u0111\u01b0\u1ee3c dung l\u01b0\u1ee3ng t\u1ed1i \u0111a, trong khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c c\u00f3 th\u1ec3 gi\u1ea3m xu\u1ed1ng c\u00f2n 50% ho\u1eb7c th\u1ea5p h\u01a1n v\u00e0o gi\u1edd cao \u0111i\u1ec3m. S\u1ef1 ch\u00eanh l\u1ec7ch n\u00e0y \u0111\u1eb7c bi\u1ec7t r\u00f5 r\u1ec7t trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u, n\u01a1i b\u0103ng th\u00f4ng quy m\u00f4 terabit c\u1ee7a c\u00e1p quang h\u1ed7 tr\u1ee3 \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c AI, trong khi gi\u1edbi h\u1ea1n 1 GHz c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf b\u0103ng th\u00f4ng r\u1ed9ng c\u01a1 b\u1ea3n ho\u1eb7c ph\u00e2n ph\u1ed1i truy\u1ec1n h\u00ecnh truy\u1ec1n th\u1ed1ng. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft s\u1ef1 so s\u00e1nh n\u00e0y:<\/p>\n\n\n\n

Di\u1ec7n m\u1ea1o<\/strong><\/th>C\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/strong><\/th>C\u00e1p quang<\/strong><\/th><\/tr><\/thead>
Dung l\u01b0\u1ee3ng b\u0103ng th\u00f4ng<\/td>L\u00ean \u0111\u1ebfn 1 GHz<\/td>Ph\u1ea1m vi Terahertz (96 Tbps)<\/td><\/tr>
Ng\u01b0\u1eddi d\u00f9ng \u0111\u1ed3ng th\u1eddi<\/td>B\u1ecb h\u1ea1n ch\u1ebf b\u1edfi t\u1eafc ngh\u1ebdn<\/td>H\u1ed7 tr\u1ee3 h\u00e0ng tr\u0103m k\u00eanh<\/td><\/tr>
Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/td>Trung b\u00ecnh (l\u00ean \u0111\u1ebfn 1 Gbps)<\/td>Cao (terabit m\u1ed7i gi\u00e2y)<\/td><\/tr>
T\u00e1c \u0111\u1ed9ng t\u1eafc ngh\u1ebdn<\/td>C\u00f3 \u00fd ngh\u0129a trong th\u1eddi gian cao \u0111i\u1ec3m<\/td>Kh\u00f4ng \u0111\u00e1ng k\u1ec3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

B\u1ea3ng n\u00e0y l\u00e0m n\u1ed5i b\u1eadt kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng b\u0103ng th\u00f4ng v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a c\u00e1p quang, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c m\u1ea1ng l\u01b0\u1edbi c\u00f3 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng trong t\u01b0\u01a1ng lai.<\/p>\n\n\n\n

So s\u00e1nh kho\u1ea3ng c\u00e1ch<\/h2>\n\n\n\n

Kh\u1ea3 n\u0103ng truy\u1ec1n t\u00edn hi\u1ec7u \u0111i xa m\u00e0 kh\u00f4ng b\u1ecb suy gi\u1ea3m l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u1ea3 vi\u1ec7c tri\u1ec3n khai \u1edf th\u00e0nh th\u1ecb v\u00e0 n\u00f4ng th\u00f4n.<\/p>\n\n\n\n

Kho\u1ea3ng c\u00e1ch c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

T\u00edn hi\u1ec7u c\u00e1p \u0111\u1ed3ng tr\u1ee5c b\u1ecb suy gi\u1ea3m tr\u00ean kho\u1ea3ng c\u00e1ch 100\u2013500 m\u00e9t do \u0111i\u1ec7n tr\u1edf v\u00e0 suy hao (0,5 dB\/100 m \u1edf t\u1ea7n s\u1ed1 1 GHz), \u0111\u00f2i h\u1ecfi ph\u1ea3i l\u1eafp b\u1ed9 khu\u1ebfch \u0111\u1ea1i sau m\u1ed7i 500 m\u00e9t. Trong c\u00e1c \u1ee9ng d\u1ee5ng b\u0103ng th\u00f4ng r\u1ed9ng, ph\u1ea1m vi hi\u1ec7u d\u1ee5ng b\u1ecb gi\u1edbi h\u1ea1n \u1edf m\u1ee9c 1\u20132 km tr\u01b0\u1edbc khi suy hao \u0111\u00e1ng k\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t, \u0111\u00f2i h\u1ecfi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng b\u1ed5 sung \u0111\u1ec3 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u.<\/p>\n\n\n\n

Kho\u1ea3ng c\u00e1ch c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang v\u01b0\u1ee3t tr\u1ed9i v\u1edbi kho\u1ea3ng c\u00e1ch l\u00ean \u0111\u1ebfn 100 km \u0111\u1ed1i v\u1edbi s\u1ee3i quang \u0111\u01a1n mode kh\u00f4ng c\u1ea7n khu\u1ebfch \u0111\u1ea1i (suy hao 0,2 dB\/km) v\u00e0 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng \u0111\u1ebfn 10.000 km trong c\u00e1c h\u1ec7 th\u1ed1ng ng\u1ea7m c\u00f3 b\u1ed9 l\u1eb7p. Kh\u1ea3 n\u0103ng n\u00e0y \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi \u0111\u1ed9 suy gi\u1ea3m t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng th\u1ea5p, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u0111\u1ecbnh k\u1ef3 sau m\u1ed7i 80\u2013100 km b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng B\u1ed9 khu\u1ebfch \u0111\u1ea1i s\u1ee3i pha t\u1ea1p Erbium<\/a> (EDFA).<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh kho\u1ea3ng c\u00e1ch<\/h3>\n\n\n\n

C\u00e1p quang truy\u1ec1n t\u1ea3i xa h\u01a1n c\u00e1p \u0111\u1ed3ng tr\u1ee5c t\u1eeb 200 \u0111\u1ebfn 1000 l\u1ea7n m\u00e0 kh\u00f4ng c\u1ea7n b\u1ed9 khu\u1ebfch \u0111\u1ea1i, gi\u00fap gi\u1ea3m chi ph\u00ed c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng kho\u1ea3ng 50%. \u0110\u1ed1i v\u1edbi vi\u1ec7c tri\u1ec3n khai b\u0103ng th\u00f4ng r\u1ed9ng \u1edf n\u00f4ng th\u00f4n, c\u00e1p quang cho ph\u00e9p k\u1ebft n\u1ed1i \u0111\u01b0\u1eddng d\u00e0i hi\u1ec7u qu\u1ea3, lo\u1ea1i b\u1ecf nhu c\u1ea7u s\u1eed d\u1ee5ng b\u1ed9 l\u1eb7p th\u01b0\u1eddng xuy\u00ean cho nhu c\u1ea7u \u0111\u1ed3ng tr\u1ee5c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m t\u0103ng chi ph\u00ed b\u1ea3o tr\u00ec l\u00ean 30 \u0111\u1ebfn 40%. \u1ede khu v\u1ef1c \u0111\u00f4 th\u1ecb, ph\u1ea1m vi ng\u1eafn h\u01a1n c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi vi\u1ec7c ph\u00e2n ph\u1ed1i c\u1ee5c b\u1ed9, nh\u01b0ng kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i xa c\u1ee7a c\u00e1p quang khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn x\u01b0\u01a1ng s\u1ed1ng cho c\u00e1c m\u1ea1ng l\u01b0\u1edbi qu\u1ed1c gia v\u00e0 qu\u1ed1c t\u1ebf.<\/p>\n\n\n\n

So s\u00e1nh chi ph\u00ed<\/h2>\n\n\n\n

Chi ph\u00ed l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng, bao g\u1ed3m \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u, chi ph\u00ed l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o tr\u00ec d\u00e0i h\u1ea1n.<\/p>\n\n\n\n

Chi ph\u00ed c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c c\u00f3 gi\u00e1 th\u00e0nh kinh t\u1ebf kho\u1ea3ng $0,5\/m\u00e9t, \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng hi\u1ec7n h\u1eefu r\u1ed9ng r\u00e3i, gi\u00fap gi\u1ea3m chi ph\u00ed tri\u1ec3n khai l\u00ean \u0111\u1ebfn 30%. Vi\u1ec7c l\u1eafp \u0111\u1eb7t r\u1ea5t \u0111\u01a1n gi\u1ea3n, ch\u1ec9 c\u1ea7n \u00edt d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng, v\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec \u1edf m\u1ee9c v\u1eeba ph\u1ea3i, trung b\u00ecnh $100\/km cho b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u00e0 chi ph\u00ed s\u1eeda ch\u1eefa h\u00e0ng n\u0103m. Tuy nhi\u00ean, trong m\u00f4i tr\u01b0\u1eddng d\u1ec5 b\u1ecb \u0103n m\u00f2n ho\u1eb7c nhi\u1ec5u t\u1eeb (EMI), vi\u1ec7c b\u1ed5 sung l\u1edbp b\u1ea3o v\u1ec7 ho\u1eb7c ti\u1ebfp \u0111\u1ecba c\u00f3 th\u1ec3 l\u00e0m t\u0103ng chi ph\u00ed th\u00eam 10\u201320% theo th\u1eddi gian.<\/p>\n\n\n\n

Chi ph\u00ed c\u00e1p quang<\/a><\/h3>\n\n\n\n

C\u00e1p quang c\u00f3 d\u1ea3i t\u1ea7n s\u1ed1 t\u1eeb $1 \u0111\u1ebfn $3 tr\u00ean m\u1ed9t m\u00e9t, ph\u1ea3n \u00e1nh chi ph\u00ed v\u1eadt li\u1ec7u cao h\u01a1n v\u00e0 nhu c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng nh\u01b0 m\u00e1y h\u00e0n c\u00e1p quang (\u0111\u1ea1t \u0111\u01b0\u1ee3c suy hao <0,05 dB). Chi ph\u00ed l\u1eafp \u0111\u1eb7t cao do y\u00eau c\u1ea7u v\u1ec1 nh\u00e2n c\u00f4ng l\u00e0nh ngh\u1ec1, th\u01b0\u1eddng m\u1ea5t 3\u20134 gi\u1edd cho m\u1ed7i 100 m\u00e9t. \u0111\u00e3 ch\u1ea5m d\u1ee9t tr\u01b0\u1edbc<\/a> C\u00e1c t\u00f9y ch\u1ecdn c\u00f3 th\u1ec3 gi\u1ea3m chi ph\u00ed n\u00e0y xu\u1ed1ng c\u00f2n 20%. Chi ph\u00ed b\u1ea3o tr\u00ec d\u00e0i h\u1ea1n th\u1ea5p h\u01a1n, v\u1edbi nhu c\u1ea7u t\u1ed1i thi\u1ec3u v\u1ec1 b\u1ed9 l\u1eb7p s\u00f3ng tr\u00ean 100 km, gi\u00fap ti\u1ebft ki\u1ec7m kho\u1ea3ng 40% chi ph\u00ed v\u1eadn h\u00e0nh trong m\u1ed9t th\u1eadp k\u1ef7.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh chi ph\u00ed<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c r\u1ebb h\u01a1n t\u1eeb 50 \u0111\u1ebfn 200% ban \u0111\u1ea7u, r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c d\u1ef1 \u00e1n n\u00e2ng c\u1ea5p quy m\u00f4 nh\u1ecf ho\u1eb7c h\u1ea1 t\u1ea7ng c\u0169, n\u01a1i c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng hi\u1ec7n c\u00f3. Tuy nhi\u00ean, c\u00e1p quang mang l\u1ea1i l\u1ee3i t\u1ee9c \u0111\u1ea7u t\u01b0 (ROI) v\u01b0\u1ee3t tr\u1ed9i h\u01a1n trong h\u01a1n 10 n\u0103m, v\u1edbi kh\u1ea3 n\u0103ng ti\u1ebft ki\u1ec7m l\u00ean \u0111\u1ebfn $50 tri\u1ec7u \u0111\u00f4 la trong c\u00e1c d\u1ef1 \u00e1n quy m\u00f4 l\u1edbn nh\u1edd gi\u1ea3m chi ph\u00ed b\u1ea3o tr\u00ec v\u00e0 n\u0103ng l\u01b0\u1ee3ng. V\u00ed d\u1ee5, vi\u1ec7c n\u00e2ng c\u1ea5p m\u1ea1ng 1000 km t\u1eeb c\u00e1p \u0111\u1ed3ng tr\u1ee5c l\u00ean c\u00e1p quang c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m $10 tri\u1ec7u \u0111\u00f4 la m\u1ed7i n\u0103m cho chi ph\u00ed b\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u00e0 s\u1eeda ch\u1eefa, m\u1eb7c d\u00f9 chi ph\u00ed ban \u0111\u1ea7u g\u1ea5p \u0111\u00f4i c\u00e1p \u0111\u1ed3ng tr\u1ee5c. \u0110i\u1ec1u n\u00e0y khi\u1ebfn c\u00e1p quang tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho vi\u1ec7c d\u1ef1 ph\u00f2ng trong t\u01b0\u01a1ng lai, trong khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u1eabn ti\u1ebft ki\u1ec7m chi ph\u00ed cho c\u00e1c nhu c\u1ea7u b\u0103ng th\u00f4ng th\u1ea5p, ng\u1eafn h\u1ea1n.<\/p>\n\n\n\n

So s\u00e1nh c\u00e0i \u0111\u1eb7t<\/h2>\n\n\n\n

Vi\u1ec7c c\u00e0i \u0111\u1eb7t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian tri\u1ec3n khai, nh\u00e2n c\u00f4ng v\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng hi\u1ec7n c\u00f3.<\/p>\n\n\n\n

L\u1eafp \u0111\u1eb7t c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

Vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1p \u0111\u1ed3ng tr\u1ee5c t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n, s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i v\u1eb7n v\u00edt (v\u00ed d\u1ee5: lo\u1ea1i F) v\u00e0 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c \u1ed1ng lu\u1ed3n d\u00e2y hi\u1ec7n c\u00f3, m\u1ea5t 1\u20132 gi\u1edd cho m\u1ed7i 100 m\u00e9t. T\u00ednh linh ho\u1ea1t c\u1ee7a c\u00e1p cho ph\u00e9p l\u1eafp \u0111\u1eb7t l\u1ea1i v\u00e0o c\u00e1c t\u00f2a nh\u00e0 c\u0169, v\u00e0 quy tr\u00ecnh n\u00e0y y\u00eau c\u1ea7u c\u00e1c c\u00f4ng c\u1ee5 c\u01a1 b\u1ea3n nh\u01b0 k\u00ecm b\u1ea5m, gi\u00fap gi\u1ea3m chi ph\u00ed nh\u00e2n c\u00f4ng. Tuy nhi\u00ean, vi\u1ec7c \u0111\u1ea3m b\u1ea3o che ch\u1eafn v\u00e0 n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) l\u00e0m t\u0103ng th\u00eam \u0111\u1ed9 ph\u1ee9c t\u1ea1p, c\u00f3 kh\u1ea3 n\u0103ng k\u00e9o d\u00e0i th\u1eddi gian l\u1eafp \u0111\u1eb7t th\u00eam 30 ph\u00fat cho m\u1ed7i \u0111o\u1ea1n.<\/p>\n\n\n\n

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

Vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00e1p quang ph\u1ee9c t\u1ea1p h\u01a1n, \u0111\u00f2i h\u1ecfi ph\u1ea3i n\u1ed1i ch\u00ednh x\u00e1c (suy hao 0,1 dB v\u1edbi m\u1ed1i n\u1ed1i c\u01a1 h\u1ecdc, <0,05 dB v\u1edbi m\u1ed1i n\u1ed1i n\u00f3ng ch\u1ea3y) v\u00e0 th\u01b0\u1eddng ph\u1ea3i ch\u00f4n c\u00e1p \u1edf \u0111\u1ed9 s\u00e2u 1,0\u20131,5 m\u00e9t \u0111\u1ec3 tr\u00e1nh h\u01b0 h\u1ecfng. Qu\u00e1 tr\u00ecnh n\u00e0y m\u1ea5t 3\u20134 gi\u1edd cho m\u1ed7i 100 m\u00e9t, \u0111\u00f2i h\u1ecfi k\u1ef9 thu\u1eadt vi\u00ean l\u00e0nh ngh\u1ec1 v\u00e0 thi\u1ebft b\u1ecb nh\u01b0 m\u00e1y \u0111o ph\u1ea3n x\u1ea1 mi\u1ec1n th\u1eddi gian quang h\u1ecdc (OTDR). C\u00e1p \u0111\u01b0\u1ee3c \u0111\u1ea5u n\u1ed1i tr\u01b0\u1edbc<\/a> v\u00e0 k\u1ef9 thu\u1eadt \u0111\u00e0o r\u00e3nh si\u00eau nh\u1ecf c\u00f3 th\u1ec3 r\u00fat ng\u1eafn th\u1eddi gian l\u1eafp \u0111\u1eb7t xu\u1ed1ng c\u00f2n 20%, nh\u01b0ng qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp ban \u0111\u1ea7u v\u1eabn \u0111\u00f2i h\u1ecfi nhi\u1ec1u nh\u00e2n c\u00f4ng.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh c\u00e0i \u0111\u1eb7t<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c l\u1eafp \u0111\u1eb7t nhanh h\u01a1n 50% trong m\u00f4i tr\u01b0\u1eddng c\u00f3 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng hi\u1ec7n h\u1eefu, mang l\u1ea1i l\u1ee3i th\u1ebf v\u1ec1 chi ph\u00ed, ti\u1ebft ki\u1ec7m nh\u00e2n c\u00f4ng t\u1eeb $50\u2013$100 tr\u00ean 100 m\u00e9t. C\u00e1p quang, m\u1eb7c d\u00f9 ch\u1eadm h\u01a1n v\u00e0 \u0111\u1eaft h\u01a1n ban \u0111\u1ea7u, nh\u01b0ng l\u1ea1i c\u00f3 \u0111\u1ed9 b\u1ec1n cao, gi\u00fap gi\u1ea3m 40% chi ph\u00ed s\u1eeda ch\u1eefa trong t\u01b0\u01a1ng lai, ti\u1ebft ki\u1ec7m $200\u2013$300 tr\u00ean 100 m\u00e9t trong h\u01a1n 10 n\u0103m. Trong c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng m\u1edbi, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a c\u00e1p quang l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh \u0111\u00e1ng \u0111\u1ec3 \u0111\u1ea7u t\u01b0, trong khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng h\u01a1n cho vi\u1ec7c n\u00e2ng c\u1ea5p nhanh ch\u00f3ng trong c\u00e1c m\u1ea1ng l\u01b0\u1edbi \u0111\u00e3 c\u00f3 s\u1eb5n.<\/p>\n\n\n\n

So s\u00e1nh \u0111\u1ed9 b\u1ec1n<\/h2>\n\n\n\n

\u0110\u1ed9 b\u1ec1n quy\u1ebft \u0111\u1ecbnh tu\u1ed5i th\u1ecd, t\u1ea7n su\u1ea5t b\u1ea3o tr\u00ec v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n

\u0110\u1ed9 b\u1ec1n c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c d\u1ec5 b\u1ecb \u0103n m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c khu v\u1ef1c \u1ea9m \u01b0\u1edbt ho\u1eb7c ven bi\u1ec3n, v\u00e0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI), c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u theo th\u1eddi gian. Tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c th\u01b0\u1eddng l\u00e0 10\u201315 n\u0103m trong \u0111i\u1ec1u ki\u1ec7n ngo\u00e0i tr\u1eddi, ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng n\u00e9n 500 N\/cm nh\u01b0ng d\u1ec5 b\u1ecb th\u1ea5m n\u01b0\u1edbc ho\u1eb7c h\u01b0 h\u1ecfng v\u1eadt l\u00fd. C\u1ea7n b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3, bao g\u1ed3m c\u1ea3 s\u1eeda ch\u1eefa v\u1ecf b\u1ea3o v\u1ec7, sau m\u1ed7i 3\u20135 n\u0103m, t\u0103ng th\u00eam $50\u2013$100\/km m\u1ed7i n\u0103m.<\/p>\n\n\n\n

\u0110\u1ed9 b\u1ec1n c\u1ee7a c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u00e0 \u0103n m\u00f2n nh\u1edd v\u1eadt li\u1ec7u kh\u00f4ng d\u1eabn \u0111i\u1ec7n, mang l\u1ea1i tu\u1ed5i th\u1ecd 20\u201330 n\u0103m. Phi\u00ean b\u1ea3n b\u1ecdc th\u00e9p ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng nghi\u1ec1n l\u00ean \u0111\u1ebfn 2000 N\/cm, v\u00e0 thi\u1ebft k\u1ebf kh\u00f4ng nh\u1ea1y u\u1ed1n cong ch\u1ecbu \u0111\u01b0\u1ee3c b\u00e1n k\u00ednh 5 mm v\u1edbi suy hao t\u1ed1i thi\u1ec3u 0,01 dB. Chi ph\u00ed b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u, ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf vi\u1ec7c s\u1eeda ch\u1eefa m\u1ed1i n\u1ed1i \u0111\u1ecbnh k\u1ef3, v\u1edbi chi ph\u00ed $20\u2013$50\/km m\u1ed7i n\u0103m.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh \u0111\u1ed9 b\u1ec1n<\/h3>\n\n\n\n

C\u00e1p quang \u00edt g\u1eb7p s\u1ef1 c\u1ed1 m\u1ea5t \u0111i\u1ec7n h\u01a1n c\u00e1p \u0111\u1ed3ng tr\u1ee5c 50%, l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t nh\u01b0 khu c\u00f4ng nghi\u1ec7p ho\u1eb7c h\u1ec7 th\u1ed1ng ng\u1ea7m. Tu\u1ed5i th\u1ecd v\u00e0 nhu c\u1ea7u b\u1ea3o tr\u00ec ng\u1eafn h\u01a1n c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c gi\u00fap t\u0103ng t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu th\u00eam 30\u201340% trong v\u00f2ng 15 n\u0103m, trong khi kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i c\u1ee7a c\u00e1p quang gi\u00fap gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng xu\u1ed1ng 80% \u1edf c\u00e1c khu v\u1ef1c d\u1ec5 b\u1ecb nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI). \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n tri\u1ec3n khai d\u00e0i h\u1ea1n, c\u00e1p quang r\u00f5 r\u00e0ng l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u.<\/p>\n\n\n\n

So s\u00e1nh b\u1ea3o m\u1eadt<\/h2>\n\n\n\n

B\u1ea3o m\u1eadt l\u00e0 y\u1ebfu t\u1ed1 t\u1ed1i quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m trong m\u00f4i tr\u01b0\u1eddng m\u1ea1ng.<\/p>\n\n\n\n

B\u1ea3o m\u1eadt c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c d\u1ec5 b\u1ecb khai th\u00e1c, v\u00ec t\u00edn hi\u1ec7u \u0111i\u1ec7n c\u00f3 th\u1ec3 b\u1ecb ch\u1eb7n b\u1eb1ng thi\u1ebft b\u1ecb t\u1ed1i thi\u1ec3u, \u0111\u00f2i h\u1ecfi ph\u1ea3i m\u00e3 h\u00f3a \u0111\u1ec3 b\u1ea3o v\u1ec7. Ki\u1ebfn tr\u00fac \u0111\u01b0\u1eddng truy\u1ec1n d\u00f9ng chung trong m\u1ea1ng b\u0103ng th\u00f4ng r\u1ed9ng l\u00e0m t\u0103ng nguy c\u01a1 nhi\u1ec5u, v\u00e0 EMI c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u, l\u00e0m gi\u1ea3m t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u.<\/p>\n\n\n\n

B\u1ea3o m\u1eadt c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang v\u1ed1n \u0111\u00e3 an to\u00e0n, v\u1edbi c\u01a1 ch\u1ebf truy\u1ec1n d\u1eabn d\u1ef1a tr\u00ean \u00e1nh s\u00e1ng, gi\u00fap vi\u1ec7c khai th\u00e1c v\u1eadt l\u00fd tr\u1edf n\u00ean kh\u00f3 kh\u0103n m\u00e0 kh\u00f4ng b\u1ecb m\u1ea5t t\u00edn hi\u1ec7u (>0,5 dB). T\u00ednh ch\u1ea5t kh\u00f4ng d\u1eabn \u0111i\u1ec7n c\u1ee7a c\u00e1p quang gi\u00fap lo\u1ea1i b\u1ecf r\u1ee7i ro nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI), v\u00e0 c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n chuy\u00ean d\u1ee5ng gi\u00fap gi\u1ea3m thi\u1ec3u nguy c\u01a1 b\u1ecb ch\u1eb7n, th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi ph\u1ea3i s\u1eed d\u1ee5ng b\u1ed9 chia quang h\u1ecdc tinh vi \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c s\u1ef1 c\u1ed1.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh an ninh<\/h3>\n\n\n\n

C\u00e1p quang 90% c\u00f3 \u0111\u1ed9 b\u1ea3o m\u1eadt t\u1ed1t h\u01a1n c\u00e1p \u0111\u1ed3ng tr\u1ee5c, v\u1edbi kh\u1ea3 n\u0103ng b\u1ecb can thi\u1ec7p th\u00f4ng qua c\u00e1c \u0111i\u1ec3m s\u1ee5t gi\u1ea3m \u0111\u1ed9t bi\u1ebfn, khi\u1ebfn n\u00f3 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng h\u01a1n cho c\u00e1c m\u1ea1ng l\u01b0\u1edbi ch\u00ednh ph\u1ee7, t\u00e0i ch\u00ednh v\u00e0 qu\u00e2n s\u1ef1. C\u00e1p \u0111\u1ed3ng tr\u1ee5c y\u00eau c\u1ea7u m\u00e3 h\u00f3a v\u00e0 gi\u00e1m s\u00e1t b\u1ed5 sung, l\u00e0m t\u0103ng chi ph\u00ed th\u00eam 10\u201315%, v\u00e0 v\u1eabn d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng do nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI), h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed1i c\u1ea3nh b\u1ea3o m\u1eadt cao.<\/p>\n\n\n\n

So s\u00e1nh c\u00e1c \u1ee9ng d\u1ee5ng<\/h2>\n\n\n\n

\u1ee8ng d\u1ee5ng quy\u1ebft \u0111\u1ecbnh t\u00ednh h\u1eefu d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a t\u1eebng lo\u1ea1i c\u00e1p trong nhi\u1ec1u b\u1ed1i c\u1ea3nh kh\u00e1c nhau.<\/p>\n\n\n\n

\u1ee8ng d\u1ee5ng c\u00e1p \u0111\u1ed3ng tr\u1ee5c<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho truy\u1ec1n h\u00ecnh c\u00e1p, cung c\u1ea5p nhi\u1ec1u k\u00eanh HD v\u00e0 internet b\u0103ng th\u00f4ng r\u1ed9ng (l\u00ean \u0111\u1ebfn 1 Gbps) trong m\u1ea1ng c\u00e1p quang-\u0111\u1ed3ng tr\u1ee5c lai (HFC). C\u00e1p \u0111\u1ed3ng tr\u1ee5c c\u0169ng ph\u1ed5 bi\u1ebfn trong c\u00e1c h\u1ec7 th\u1ed1ng gi\u00e1m s\u00e1t video t\u1ea7m ng\u1eafn v\u00e0 v\u00f4 tuy\u1ebfn nghi\u1ec7p d\u01b0, n\u01a1i chi ph\u00ed v\u00e0 t\u00ednh d\u1ec5 l\u1eafp \u0111\u1eb7t \u0111\u01b0\u1ee3c \u01b0u ti\u00ean h\u01a1n t\u1ed1c \u0111\u1ed9.<\/p>\n\n\n\n

\u1ee8ng d\u1ee5ng c\u00e1p quang<\/h3>\n\n\n\n

C\u00e1p quang cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho internet t\u1ed1c \u0111\u1ed9 cao (1\u201310 Gbps) trong c\u00e1c tri\u1ec3n khai FTTH, vi\u1ec5n th\u00f4ng \u0111\u01b0\u1eddng d\u00e0i, trung t\u00e2m d\u1eef li\u1ec7u (100\u2013400 Gbps) v\u00e0 h\u1ec7 th\u1ed1ng h\u00ecnh \u1ea3nh y t\u1ebf. \u0110\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 b\u0103ng th\u00f4ng cao khi\u1ebfn n\u00f3 tr\u1edf n\u00ean thi\u1ebft y\u1ebfu cho m\u1ea1ng l\u01b0\u1edbi backhaul 5G, \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y v\u00e0 nghi\u00ean c\u1ee9u khoa h\u1ecdc.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh c\u00e1c \u1ee9ng d\u1ee5ng<\/h3>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u01b0\u1ee3t tr\u1ed9i trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u1ed1ng nh\u01b0 m\u1ea1ng HFC v\u00e0 ph\u00e2n ph\u1ed1i truy\u1ec1n h\u00ecnh d\u00e2n d\u1ee5ng, n\u01a1i nhu c\u1ea7u b\u0103ng th\u00f4ng \u1edf m\u1ee9c trung b\u00ecnh. C\u00e1p quang chi\u1ebfm \u01b0u th\u1ebf trong c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i, dung l\u01b0\u1ee3ng cao, h\u1ed7 tr\u1ee3 s\u1ed1 l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng tr\u00ean m\u1ed7i \u0111\u01b0\u1eddng truy\u1ec1n b\u0103ng th\u00f4ng r\u1ed9ng \u0111\u00f4 th\u1ecb g\u1ea5p 10 l\u1ea7n v\u00e0 cho ph\u00e9p c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u quy m\u00f4 terabit. V\u00e0o n\u0103m 2025, t\u00ednh linh ho\u1ea1t c\u1ee7a c\u00e1p quang s\u1ebd \u0111\u1ecbnh v\u1ecb n\u00f3 l\u00e0 x\u01b0\u01a1ng s\u1ed1ng cho c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i, trong khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u1eabn l\u00e0 gi\u1ea3i ph\u00e1p ti\u1ebft ki\u1ec7m chi ph\u00ed cho k\u1ebft n\u1ed1i c\u01a1 b\u1ea3n.<\/p>\n\n\n\n

Xu h\u01b0\u1edbng v\u00e0 c\u00e2n nh\u1eafc trong t\u01b0\u01a1ng lai<\/h2>\n\n\n\n

C\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i v\u00e0 vi\u1ec7c \u00e1p d\u1ee5ng<\/h3>\n\n\n\n

T\u00ednh \u0111\u1ebfn ng\u00e0y 23 th\u00e1ng 8 n\u0103m 2025, c\u00e1p quang ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u01b0\u01a1ng lai, v\u1edbi thi\u1ebft k\u1ebf \u0111a l\u00f5i (v\u00ed d\u1ee5: 288 s\u1ee3i quang) h\u1ed7 tr\u1ee3 dung l\u01b0\u1ee3ng 200 Tbps cho 6G tr\u1edf l\u00ean. C\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft l\u1eadp lai, v\u1edbi DOCSIS 4.0 h\u1ee9a h\u1eb9n t\u1ed1c \u0111\u1ed9 \u0111\u1ed1i x\u1ee9ng 10 Gbps, nh\u01b0ng gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng c\u1ee7a n\u00f3 h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng l\u00e2u d\u00e0i.<\/p>\n\n\n\n

Th\u00e1ch th\u1ee9c v\u00e0 C\u01a1 h\u1ed9i<\/h3>\n\n\n\n

Chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n c\u1ee7a c\u00e1p quang ($1\u2013$3\/m\u00e9t) v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p trong l\u1eafp \u0111\u1eb7t v\u1eabn l\u00e0 nh\u1eefng th\u00e1ch th\u1ee9c, nh\u01b0ng b\u00f9 l\u1ea1i chi ph\u00ed v\u1eadn h\u00e0nh th\u1ea5p h\u01a1n c\u1ee7a 40% trong 10 n\u0103m. Gi\u1edbi h\u1ea1n b\u0103ng th\u00f4ng c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c (1 GHz) v\u00e0 kh\u1ea3 n\u0103ng d\u1ec5 b\u1ecb nhi\u1ec5u \u0111\u00e3 c\u1ea3n tr\u1edf s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a n\u00f3, m\u1eb7c d\u00f9 chi ph\u00ed th\u1ea5p ($0,5\/m\u00e9t) v\u1eabn duy tr\u00ec \u0111\u01b0\u1ee3c vi\u1ec7c s\u1eed d\u1ee5ng \u1edf nh\u1eefng khu v\u1ef1c c\u00f3 ng\u00e2n s\u00e1ch eo h\u1eb9p.<\/p>\n\n\n\n

Ph\u00e2n t\u00edch so s\u00e1nh c\u00e1c xu h\u01b0\u1edbng t\u01b0\u01a1ng lai<\/h3>\n\n\n\n

S\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1p quang v\u1edbi c\u00e1c m\u1ea1ng 6G, IoT v\u00e0 AI \u0111\u00e3 \u0111\u01b0a n\u00f3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p, v\u1edbi th\u1ecb ph\u1ea7n d\u1ef1 ki\u1ebfn t\u0103ng l\u00ean 70% v\u00e0o n\u0103m 2030. Vai tr\u00f2 c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c \u0111ang gi\u1ea3m d\u1ea7n nh\u01b0ng v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c c\u00e1c \u1ee9ng d\u1ee5ng chuy\u00ean bi\u1ec7t, v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00e1p quang-c\u00e1p \u0111\u1ed3ng tr\u1ee5c lai t\u1ea1o n\u00ean c\u1ea7u n\u1ed1i cho qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i. \u0110\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng l\u01b0\u1edbi h\u01b0\u1edbng \u0111\u1ebfn t\u01b0\u01a1ng lai, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a c\u00e1p quang mang l\u1ea1i l\u1ee3i th\u1ebf t\u1eeb 5\u201310 n\u0103m so v\u1edbi vi\u1ec7c n\u00e2ng c\u1ea5p c\u00e1p \u0111\u1ed3ng tr\u1ee5c.<\/p>\n\n\n\n

Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n\n\n\n

C\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0 c\u00e1p quang \u0111\u1ec1u c\u00f3 nh\u1eefng m\u1ee5c \u0111\u00edch ri\u00eang bi\u1ec7t, trong \u0111\u00f3 c\u00e1p quang v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 t\u1ed1c \u0111\u1ed9 (10\u201340 l\u1ea7n), b\u0103ng th\u00f4ng (80\u2013100 l\u1ea7n), kho\u1ea3ng c\u00e1ch (200\u20131000 l\u1ea7n), \u0111\u1ed9 b\u1ec1n v\u00e0 b\u1ea3o m\u1eadt, trong khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c n\u1ed5i tr\u1ed9i v\u1ec1 chi ph\u00ed v\u00e0 d\u1ec5 l\u1eafp \u0111\u1eb7t. \u1ee8ng d\u1ee5ng c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c tr\u1ea3i r\u1ed9ng t\u1eeb s\u1ef1 th\u1ed1ng tr\u1ecb c\u1ee7a c\u00e1p \u0111\u1ed3ng tr\u1ee5c trong truy\u1ec1n h\u00ecnh c\u00e1p truy\u1ec1n th\u1ed1ng v\u00e0 b\u0103ng th\u00f4ng r\u1ed9ng c\u01a1 b\u1ea3n \u0111\u1ebfn s\u1ef1 d\u1eabn \u0111\u1ea7u c\u1ee7a c\u00e1p quang trong vi\u1ec5n th\u00f4ng t\u1ed1c \u0111\u1ed9 cao v\u00e0 trung t\u00e2m d\u1eef li\u1ec7u. T\u00ednh \u0111\u1ebfn n\u0103m 2025, t\u00ednh \u01b0u vi\u1ec7t v\u1ec1 c\u00f4ng ngh\u1ec7 v\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi t\u01b0\u01a1ng lai c\u1ee7a c\u00e1p quang khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho c\u00e1c m\u1ea1ng l\u01b0\u1edbi \u0111ang ph\u00e1t tri\u1ec3n, trong khi c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u1eabn kh\u1ea3 thi cho c\u00e1c gi\u1ea3i ph\u00e1p ng\u1eafn h\u1ea1n, ti\u1ebft ki\u1ec7m chi ph\u00ed. Kh\u00e1m ph\u00e1 c\u00e1c t\u00f9y ch\u1ecdn c\u00e1p ti\u00ean ti\u1ebfn t\u1ea1i CommMesh.<\/p>","protected":false},"excerpt":{"rendered":"

Trong b\u1ed1i c\u1ea3nh vi\u1ec5n th\u00f4ng v\u00e0 truy\u1ec1n d\u1eef li\u1ec7u kh\u00f4ng ng\u1eebng ph\u00e1t tri\u1ec3n, vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1p \u0111\u1ed3ng tr\u1ee5c v\u00e0 c\u00e1p quang l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u1ea1ng, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 hi\u1ec7u qu\u1ea3 chi ph\u00ed. C\u00e1p \u0111\u1ed3ng tr\u1ee5c, m\u1ed9t c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u1ed1ng v\u1edbi l\u00f5i \u0111\u1ed3ng trung t\u00e2m \u0111\u01b0\u1ee3c b\u1ecdc trong l\u1edbp v\u1ecf kim lo\u1ea1i, t\u1eeb l\u00e2u \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00e1t s\u00f3ng v\u00e0 cung c\u1ea5p internet. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1p quang, m\u1ed9t [\u2026]<\/p>","protected":false},"author":1,"featured_media":4336,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Coaxial Cable vs. Fiber Optic: A Comprehensive Comparison","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[34],"tags":[],"class_list":["post-4333","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\/4333","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=4333"}],"version-history":[{"count":6,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/4333\/revisions"}],"predecessor-version":[{"id":4435,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/4333\/revisions\/4435"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media\/4336"}],"wp:attachment":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media?parent=4333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/categories?post=4333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/tags?post=4333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}