{"id":18656,"date":"2025-03-06T05:59:22","date_gmt":"2025-03-06T05:59:22","guid":{"rendered":"https:\/\/dekam-fiber.com\/?p=18656"},"modified":"2025-03-08T09:41:39","modified_gmt":"2025-03-08T09:41:39","slug":"fibre-optic-signal-loss-and-attenuation","status":"publish","type":"post","link":"https:\/\/dekam-fiber.com\/vi\/fibre-optic-signal-loss-and-attenuation\/","title":{"rendered":"T\u00ecm hi\u1ec3u v\u1ec1 s\u1ef1 suy gi\u1ea3m v\u00e0 m\u1ea5t t\u00edn hi\u1ec7u s\u1ee3i quang"},"content":{"rendered":"<p>Ng\u00e0y nay, vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u t\u1ed1c \u0111\u1ed9 cao tr\u00ean to\u00e0n c\u1ea7u ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1p quang, nh\u01b0ng m\u1ea5t t\u00edn hi\u1ec7u v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 c\u1ed1. N\u1ebfu nh\u1eefng m\u1ea5t m\u00e1t n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd, m\u1ea1ng c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi t\u1ed1c \u0111\u1ed9 ch\u1eadm v\u00e0 hi\u1ec7u su\u1ea5t gi\u1ea3m. Tuy nhi\u00ean, h\u00e3y b\u00ecnh t\u0129nh! C\u00f3 m\u1ed9t tin t\u1ed1t l\u00e0 m\u1ea5t m\u00e1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u.<\/p>\n\n\n\n<p>Do \u0111\u00f3, m\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c vi\u1ebft blog n\u00e0y l\u00e0 gi\u00fap b\u1ea1n l\u00e0m quen v\u1edbi c\u00e1c v\u1ea5n \u0111\u1ec1 m\u1ea5t t\u00edn hi\u1ec7u s\u1ee3i quang v\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra ch\u00fang trong c\u00e1p quang. V\u00ec v\u1eady, trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y m\u1ea5t t\u00edn hi\u1ec7u s\u1ee3i quang l\u00e0 g\u00ec, c\u00e1c lo\u1ea1i, ph\u00e9p \u0111o v\u00e0 c\u1ea3 m\u1eb9o \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c m\u1ea5t t\u00edn hi\u1ec7u nh\u01b0 v\u1eady. V\u00ec v\u1eady, h\u00e3y theo d\u00f5i ch\u00fang t\u00f4i!<\/p>\n\n\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"314\" src=\"https:\/\/dekam-fiber.com\/wp-content\/uploads\/2025\/03\/image-3.jpeg\" alt=\"S\u1ee3i quang M\u1ea5t t\u00edn hi\u1ec7u v\u00e0 suy gi\u1ea3m\" class=\"wp-image-18659\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 1 M\u1ea5t v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u s\u1ee3i quang<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>1) C\u00e1i g\u00ec l\u00e0 <\/em><\/strong><strong><em>M\u1ea5t m\u00e1t s\u1ee3i quang<\/em><\/strong><strong><em>?<\/em><\/strong><\/h2>\n\n\n\n<p><em>\u201c<\/em><em>M\u1ea5t m\u00e1t s\u1ee3i quang <\/em><em>x\u1ea3y ra khi m\u1ed9t ph\u1ea7n \u00e1nh s\u00e1ng \u0111ang truy\u1ec1n qua c\u00e1p tr\u1edf n\u00ean y\u1ebfu h\u01a1n tr\u01b0\u1edbc khi \u0111\u1ebfn \u0111\u01b0\u1ee3c \u0111\u1ea7u cu\u1ed1i.\u201d&nbsp;<\/em><\/p>\n\n\n\n<p>H\u01a1n n\u1eefa, h\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t k\u1ecbch b\u1ea3n m\u00e0 m\u1ed9t ng\u01b0\u1eddi \u0111ang h\u00e9t s\u00e2u v\u00e0o trong \u0111\u01b0\u1eddng h\u1ea7m; ban \u0111\u1ea7u, gi\u1ecdng n\u00f3i truy\u1ec1n \u0111i t\u1ed1t, nh\u01b0ng khi truy\u1ec1n \u0111i xa h\u01a1n, \u00e2m l\u01b0\u1ee3ng c\u1ee7a n\u00f3 gi\u1ea3m \u0111i. S\u1ef1 m\u1edd d\u1ea7n n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <a href=\"https:\/\/www.sciencedirect.com\/topics\/engineering\/fiber-attenuation\" target=\"_blank\" rel=\"noreferrer noopener\">suy gi\u1ea3m trong s\u1ee3i quang<\/a>, \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng decibel tr\u00ean kilomet (dB\/km).\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>Suy hao s\u1ee3i quang so v\u1edbi suy hao<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<p>B\u00e2y gi\u1edd, b\u1ea1n c\u00f3 th\u1ec3 h\u1ecfi s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ea5t m\u00e1t v\u00e0 suy gi\u1ea3m l\u00e0 g\u00ec. V\u00e2ng! M\u1ea5t m\u00e1t m\u00f4 t\u1ea3 b\u1ea5t k\u1ef3 s\u1ef1 s\u1ee5t gi\u1ea3m n\u00e0o v\u1ec1 c\u00f4ng su\u1ea5t t\u00edn hi\u1ec7u. M\u1eb7t kh\u00e1c, suy gi\u1ea3m \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t lo\u1ea1i m\u1ea5t m\u00e1t c\u1ee5 th\u1ec3 x\u1ea3y ra trong s\u1ee3i do s\u1ef1 h\u1ea5p th\u1ee5 v\u00e0 t\u00e1n x\u1ea1 \u00e1nh s\u00e1ng. Ngo\u00e0i ra, h\u00e3y nh\u1edb r\u1eb1ng \u0111i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng khi s\u1eed d\u1ee5ng internet \u0111\u01b0\u1eddng d\u00e0i ho\u1eb7c m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao.&nbsp;<\/p>\n\n\n\n<p>Tuy nhi\u00ean, n\u1ebfu kh\u00f4ng c\u00f3 gi\u1ea3i ph\u00e1p, c\u00e1c cu\u1ed9c g\u1ecdi video s\u1ebd b\u1ecb tr\u1ec5, ph\u00e1t tr\u1ef1c tuy\u1ebfn s\u1ebd b\u1ecb \u0111\u1ec7m li\u00ean t\u1ee5c v\u00e0 t\u1ed1c \u0111\u1ed9 t\u1ea3i xu\u1ed1ng s\u1ebd ch\u1eadm \u0111\u00e1ng k\u1ec3. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t c\u00e1p quang l\u00e0 c\u1ef1c k\u1ef3 quan tr\u1ecdng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>2) C\u00e1c lo\u1ea1i m\u1ea5t m\u00e1t s\u1ee3i quang v\u00e0 nguy\u00ean nh\u00e2n c\u1ee7a ch\u00fang<\/em><\/strong><\/h2>\n\n\n\n<p>Suy hao s\u1ee3i quang (db\/km) \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh hai nh\u00f3m: N\u1ed9i t\u1ea1i v\u00e0 ngo\u1ea1i t\u1ea1i. Ch\u00fang \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, m\u1ed7i lo\u1ea1i c\u00f3 m\u1ed9t nguy\u00ean nh\u00e2n kh\u00e1c nhau. V\u1eady, ch\u00fang ta h\u00e3y c\u00f9ng ph\u00e2n t\u00edch nh\u00e9!<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><em>i) T\u1ed5n th\u1ea5t n\u1ed9i t\u1ea1i<\/em><\/strong><\/h3>\n\n\n\n<p>Lo\u1ea1i t\u1ed5n th\u1ea5t n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ed5n th\u1ea5t do ch\u00ednh v\u1eadt li\u1ec7u s\u1ee3i g\u00e2y ra. Th\u1eadt kh\u00f4ng may, n\u00f3 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n kh\u1ecfi s\u1ee3i, nh\u01b0ng m\u1ed9t s\u1ed1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m b\u1edbt b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><em>a. S\u1ef1 m\u1ea5t m\u00e1t h\u1ea5p th\u1ee5&nbsp;<\/em><\/strong><\/h4>\n\n\n\n<p>Let\u2019s say you flash a light through a dirty window, but some light does not pass through. Similarly, in your fibre optic cables, when light enters the glass core, it absorbs energy due to the glass&#8217;s tiny impurities transforming it into heat which is known as absorption loss.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nguy\u00ean nh\u00e2n ch\u00ednh:<\/strong>&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y ra m\u1ea5t h\u1ea5p th\u1ee5 l\u00e0 n\u1ed3ng \u0111\u1ed9 nh\u1ecf c\u00e1c ion OH- (ph\u00e2n t\u1eed n\u01b0\u1edbc) c\u00f3 trong s\u1ee3i quang c\u1ee7a b\u1ea1n. C\u00e1c ion n\u00e0y thu n\u0103ng l\u01b0\u1ee3ng l\u00e0m suy y\u1ebfu t\u00edn hi\u1ec7u \u1edf kho\u1ea3ng 1383 nm. H\u00e3y nh\u1edb r\u1eb1ng h\u1ea7u h\u1ebft th\u1ee7y tinh ngay c\u1ea3 khi tinh khi\u1ebft t\u1ed1i \u01b0u c\u0169ng s\u1ebd h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi s\u1ee3i quang c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>V\u00ed d\u1ee5:<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u1ede 1550 nm, m\u1ed9t s\u1ee3i quang ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t c\u00f3 \u0111\u1ed9 suy gi\u1ea3m h\u1ea5p th\u1ee5 kho\u1ea3ng 0,2 dB\/km. N\u1ebfu s\u1ee3i quang c\u00f3 nhi\u1ec1u t\u1ea1p ch\u1ea5t h\u01a1n, \u0111\u1ed9 suy gi\u1ea3m th\u1eadm ch\u00ed c\u00f2n t\u0103ng l\u00ean.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXccP51VM0WsBxWq2CsymtNNsvNpgOdBEMgPfVWfxZKgpoy-jRp8Sar3VhOfksfYRrinzf_EFX3sjjHlsmbwd1Mc857rdwBZIwYtP18_FLJaY3waUzIdOW3yFal6BlKo3syVrEnm?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"C\u00e1c lo\u1ea1i m\u1ea5t s\u1ee3i\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 2 C\u00e1c lo\u1ea1i <\/em><em>M\u1ea5t ch\u1ea5t x\u01a1<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><em>b. T\u1ed5n th\u1ea5t ph\u00e2n t\u00e1n&nbsp;<\/em><\/strong><\/h4>\n\n\n\n<p>B\u1ea1n \u0111\u00e3 bao gi\u1edd quan s\u00e1t s\u01b0\u01a1ng m\u00f9 ph\u00e2n t\u00e1n tia n\u1eafng m\u1eb7t tr\u1eddi ch\u01b0a? \u0110\u00f3 ch\u00ednh l\u00e0 \u0111i\u1ec1u x\u1ea3y ra trong c\u00e1p quang c\u1ee7a b\u1ea1n. V\u00ed d\u1ee5; khi nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong v\u1eadt li\u1ec7u c\u1ee7a s\u1ee3i quang khi\u1ebfn \u00e1nh s\u00e1ng ph\u00e2n t\u00e1n theo nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau, th\u00ec hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u00e1n x\u1ea1 Rayleigh.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nguy\u00ean nh\u00e2n ch\u00ednh:<\/strong>&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>The fibre&#8217;s small density changes during the manufacturing process. These small imperfections change the scattering of energy.<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>V\u00ed d\u1ee5:<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T\u1ed5n th\u1ea5t do t\u00e1n x\u1ea1 Rayleigh l\u00e0 0,18 dB\/km \u1edf 1550 nm v\u00e0 t\u0103ng l\u00ean 2,5 dB\/km \u1edf 850 nm. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang t\u00f4i th\u00edch b\u01b0\u1edbc s\u00f3ng d\u00e0i h\u01a1n cho truy\u1ec1n th\u00f4ng kho\u1ea3ng c\u00e1ch xa.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong><em>ii) T\u1ed5n th\u1ea5t b\u00ean ngo\u00e0i&nbsp;<\/em><\/strong><\/h3>\n\n\n\n<p>T\u1ed5n th\u1ea5t b\u00ean ngo\u00e0i l\u00e0 ng\u01b0\u1ee3c l\u1ea1i v\u1edbi t\u1ed5n th\u1ea5t b\u00ean trong; n\u00f3 x\u1ea3y ra do c\u00e1c h\u00e0nh \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean s\u1ee3i quang, ch\u1eb3ng h\u1ea1n nh\u01b0 u\u1ed1n cong qu\u00e1 m\u1ee9c, k\u1ebft n\u1ed1i k\u00e9m v\u00e0 th\u00eam nhi\u1ec1u th\u00e0nh ph\u1ea7n m\u1ea1ng h\u01a1n m\u1ee9c c\u1ea7n thi\u1ebft. \u0110\u1eebng lo l\u1eafng, h\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u1ec1u c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c ho\u1eb7c n\u1eb1m trong t\u1ea7m ki\u1ec3m so\u00e1t c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><em>c. T\u1ed5n th\u1ea5t u\u1ed1n cong<\/em><\/strong><\/h4>\n\n\n\n<p>N\u1ebfu b\u1ea1n u\u1ed1n cong \u1ed1ng h\u00fat qu\u00e1 m\u1ed9t g\u00f3c nh\u1ea5t \u0111\u1ecbnh, ch\u1ea5t l\u1ecfng s\u1ebd kh\u00f4ng th\u1ec3 ch\u1ea3y t\u1ef1 do. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, n\u1ebfu b\u1ea1n u\u1ed1n cong qu\u00e1 m\u1ee9c <a href=\"https:\/\/dekam-fiber.com\/vi\/ofc-cable\/\" target=\"_blank\" rel=\"noreferrer noopener\">c\u00e1p quang<\/a>, \u0111i\u1ec1u t\u01b0\u01a1ng t\u1ef1 c\u0169ng x\u1ea3y ra. Thay v\u00ec \u0111\u01b0\u1ee3c ch\u1ee9a ho\u00e0n to\u00e0n trong l\u00f5i, m\u1ed9t ph\u1ea7n \u00e1nh s\u00e1ng b\u1ecb r\u00f2 r\u1ec9 ra ngo\u00e0i, g\u00e2y b\u1ea5t l\u1ee3i cho gi\u00e1 tr\u1ecb t\u00edn hi\u1ec7u. H\u00e3y c\u00f9ng xem c\u00e1c lo\u1ea1i c\u1ee7a n\u00f3!<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>U\u1ed1n cong v\u0129 m\u00f4:<\/em><\/strong><em> C\u00e1c \u0111\u01b0\u1eddng cong l\u1edbn tr\u00ean c\u00e1p quang c\u1ee7a b\u1ea1n nh\u01b0 khi n\u00f3 b\u1ecb cu\u1ed9n qu\u00e1 ch\u1eb7t ho\u1eb7c b\u1ecb d\u1ef1ng \u0111\u1ee9ng c\u0169ng c\u00f3 h\u1eadu qu\u1ea3. V\u00ed d\u1ee5, c\u00f3 th\u1ec3 x\u1ea3y ra t\u00ecnh tr\u1ea1ng m\u1ea5t nhi\u1ec1u t\u00edn hi\u1ec7u khi s\u1ee3i quang b\u1ecb u\u1ed1n cong ch\u1eb7t h\u01a1n b\u00e1n k\u00ednh 30 mm.<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>U\u1ed1n cong nh\u1ecf: <\/em><\/strong><em>Lo\u1ea1i t\u1ed5n th\u1ea5t u\u1ed1n cong n\u00e0y l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a \u00e1p su\u1ea5t b\u00ean ngo\u00e0i v\u00e0 l\u1eafp \u0111\u1eb7t s\u1ee3i quang kh\u00f4ng t\u1ed1t. V\u00ed d\u1ee5, b\u1ea1n bi\u1ebft \u0111\u1ea5y, m\u1ed9t v\u1ebft l\u00f5m tr\u00ean s\u1ee3i quang c\u00f3 th\u1ec3 l\u00e0m t\u0103ng t\u1ed5n th\u1ea5t th\u00eam 0,5 dB ho\u1eb7c th\u1eadm ch\u00ed nhi\u1ec1u h\u01a1n.<\/em><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><em>d. <\/em><\/strong><strong><em>\u0110\u1ea7u n\u1ed1i s\u1ee3i v\u00e0 suy hao m\u1ed1i n\u1ed1i<\/em><\/strong><\/h4>\n\n\n\n<p>M\u1ed7i l\u1ea7n b\u1ea1n n\u1ed1i hai s\u1ee3i c\u00e1p quang, c\u00f3 th\u1ec3 x\u1ea3y ra t\u00ecnh tr\u1ea1ng m\u1ea5t m\u1ed9t l\u01b0\u1ee3ng \u00e1nh s\u00e1ng do thi\u1ebfu s\u1ef1 c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra \u1edf c\u1ea3 \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i, v\u00e0 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn m\u1ea1ng c\u1ee7a b\u1ea1n. H\u00e3y c\u00f9ng ph\u00e2n t\u00edch c\u00e1c lo\u1ea1i c\u1ee7a n\u00f3!<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>N\u1ed1i nhi\u1ec7t: <\/em><\/strong><em>K\u1ef9 thu\u1eadt n\u00e0y n\u1ed1i c\u00e1c s\u1ee3i quang b\u1eb1ng nhi\u1ec7t v\u00e0 cung c\u1ea5p k\u1ebft n\u1ed1i c\u00f3 m\u1ee9c suy hao th\u1ea5p (t\u1ed5n hao kho\u1ea3ng 0,1 dB).<\/em><\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>N\u1ed1i c\u01a1 h\u1ecdc: <\/em><\/strong><em>C\u00e1c s\u1ee3i \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nhau b\u1eb1ng keo v\u00e0 s\u1ebd m\u1ea5t kho\u1ea3ng 0,5 dB ho\u1eb7c h\u01a1n n\u1ebfu th\u1ef1c hi\u1ec7n kh\u00f4ng \u0111\u00fang c\u00e1ch.<\/em><\/li>\n<\/ul>\n\n\n\n<p>H\u01a1n n\u1eefa, h\u00e3y nh\u1edb r\u1eb1ng n\u1ebfu c\u00e1c \u0111\u1ea7u ra c\u1ee7a s\u1ee3i quang ch\u1ec9 \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh v\u1eeba ph\u1ea3i th\u00ec ngay c\u1ea3 m\u1ed9t khe h\u1edf nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t t\u00edn hi\u1ec7u \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><em>e. M\u1ea5t ch\u00e8n&nbsp;<\/em><\/strong><\/h4>\n\n\n\n<p>Ngo\u00e0i ra, m\u1ea1ng c\u00e1p quang c\u00f2n gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng do th\u00eam c\u00e1c th\u00e0nh ph\u1ea7n nh\u01b0 \u0111\u1ea7u n\u1ed1i, b\u1ed9 chia v\u00e0 b\u1ed9 gh\u00e9p n\u1ed1i l\u00e0m gi\u1ea3m l\u01b0\u1ee3ng t\u00edn hi\u1ec7u t\u1ed1t trong h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5, \u0111\u1ea7u n\u1ed1i chu\u1ea9n l\u00e0m t\u0103ng m\u1ee9c suy hao l\u00ean kho\u1ea3ng 0,2 dB. H\u01a1n n\u1eefa, t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i b\u1ed9 chia, m\u1ee9c suy hao b\u1ed5 sung \u0111\u01b0\u1ee3c gi\u1ea3m xu\u1ed1ng c\u00f2n 3 dB tr\u1edf l\u00ean, ngh\u0129a l\u00e0 t\u00edn hi\u1ec7u s\u1ebd gi\u1ea3m m\u1ed9t n\u1eeda.<\/p>\n\n\n\n<p>H\u01a1n n\u1eefa, m\u1ed9t ng\u01b0\u1eddi tr\u00ean Qoura, Peter Brown, l\u00e0 Chuy\u00ean gia v\u1eadn h\u00e0nh t\u1ea1i Shanghai Baudcom Communication Device Co., Ltd c\u0169ng \u0111\u00e3 n\u00eau ra nh\u1eefng l\u00fd do m\u1ea5t c\u00e1p quang nh\u01b0 \u0111\u00e3 n\u00eau \u1edf tr\u00ean. V\u00ec v\u1eady, ch\u00fang ta ph\u1ea3i c\u00e2n nh\u1eafc nh\u1eefng \u0111i\u1ec1u n\u00e0y v\u00e0 t\u00ecm gi\u1ea3i ph\u00e1p \u0111\u1ec3 t\u1eadn h\u01b0\u1edfng internet t\u1ed1c \u0111\u1ed9 cao m\u00e0 kh\u00f4ng b\u1ecb ch\u1eadm tr\u1ec5.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXf8ex1Ycl0wGYZ8tcMBYUkf7kkcv0RUwrnVQBH7bItybCKvY4bwvPBAUtZL7UorNY1IkdeF8aigIXPKC4HgvlGYG_qWUcsN2IQ1OXGcthyuSpwv88nDDlLC11xOw5wYunoQ_mGm?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"quora\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>B\u1ea3ng t\u00f3m t\u1eaft<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong><em>Lo\u1ea1i m\u1ea5t m\u00e1t<\/em><\/strong><\/td><td><strong><em>G\u00e2y ra&nbsp;<\/em><\/strong><\/td><td><strong><em>T\u00e1c d\u1ee5ng<\/em><\/strong><\/td><td><strong><em>M\u1ea5t m\u00e1t \u0111i\u1ec3n h\u00ecnh<\/em><\/strong><\/td><\/tr><tr><td><strong><em>M\u1ea5t h\u1ea5p th\u1ee5<\/em><\/strong><\/td><td><em>C\u00e1c t\u1ea1p ch\u1ea5t (ion OH-)<\/em><\/td><td><em>\u00c1nh s\u00e1ng bi\u1ebfn th\u00e0nh nhi\u1ec7t<\/em><\/td><td><em>0,2 dB\/km<\/em><\/td><\/tr><tr><td><strong><em>M\u1ea5t m\u00e1t ph\u00e2n t\u00e1n<\/em><\/strong><\/td><td><em>S\u1ef1 kh\u00f4ng ho\u00e0n h\u1ea3o c\u1ee7a v\u1eadt li\u1ec7u<\/em><\/td><td><em>\u00c1nh s\u00e1ng b\u1ecb h\u01b0\u1edbng sai<\/em><\/td><td><em>0,18 dB\/km<\/em><\/td><\/tr><tr><td><strong><em>T\u1ed5n th\u1ea5t u\u1ed1n cong v\u0129 m\u00f4<\/em><\/strong><\/td><td><em>U\u1ed1n cong s\u1ee3i l\u1edbn<\/em><\/td><td><em>\u00c1nh s\u00e1ng r\u00f2 r\u1ec9 ra ngo\u00e0i<\/em><\/td><td><em>Cao n\u1ebfu &lt;30 mm<\/em><\/td><\/tr><tr><td><strong><em>T\u1ed5n th\u1ea5t do u\u1ed1n cong vi m\u00f4<\/em><\/strong><\/td><td><em>Bi\u1ebfn d\u1ea1ng s\u1ee3i nh\u1ecf<\/em><\/td><td><em>\u00c1nh s\u00e1ng b\u1ecb h\u01b0\u1edbng sai<\/em><\/td><td><em>0,2 dB\/k\u1ebft n\u1ed1i<\/em><\/td><\/tr><tr><td><strong><em>M\u1ea5t k\u1ebft n\u1ed1i<\/em><\/strong><\/td><td><em>C\u0103n ch\u1ec9nh k\u00e9m<\/em><\/td><td><em>\u00cdt \u00e1nh s\u00e1ng \u0111i qua<\/em><\/td><td><em>0,5dB+<\/em><\/td><\/tr><tr><td><strong><em>M\u1ea5t gh\u00e9p n\u1ed1i<\/em><\/strong><\/td><td><em>N\u1ed1i s\u1ee3i x\u1ea5u<\/em><\/td><td><em>L\u00e0m suy y\u1ebfu vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u<\/em><\/td><td><em>0,1 dB (h\u1ee3p nh\u1ea5t), 0,5 dB (c\u01a1 h\u1ecdc)<\/em><\/td><\/tr><tr><td><strong><em>M\u1ea5t ch\u00e8n<\/em><\/strong><\/td><td><em>C\u00e1c th\u00e0nh ph\u1ea7n b\u1ed5 sung (b\u1ed9 chia)<\/em><\/td><td><em>T\u00edn hi\u1ec7u y\u1ebfu \u0111i<\/em><\/td><td><em>3 dB\/b\u1ed9 chia<\/em><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>3) \u0110o \u0111\u1ed9 suy gi\u1ea3m quang h\u1ecdc<\/em><\/strong><\/h2>\n\n\n\n<p>\u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng t\u1ed5n th\u1ea5t trong s\u1ee3i quang l\u00e0 decibel tr\u00ean kilomet (dB\/km). \u0110i\u1ec1u n\u00e0y bi\u1ec3u th\u1ecb m\u1ee9c \u0111\u1ed9 c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u b\u1ecb m\u1ea5t cho m\u1ed7i kilomet c\u00e1p quang m\u00e0 \u00e1nh s\u00e1ng \u0111i qua. H\u01a1n n\u1eefa, c\u00f3 gi\u00e1 tr\u1ecb th\u1ea5p h\u01a1n t\u00ednh b\u1eb1ng dB\/km c\u00f3 ngh\u0129a l\u00e0 s\u1ee3i quang trong h\u01a1n v\u00e0 duy tr\u00ec d\u1eef li\u1ec7u t\u1ed1t h\u01a1n.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh gi\u00e1 m\u1ee9c m\u1ea5t t\u00edn hi\u1ec7u trong s\u1ee3i quang:<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>i) M\u00e1y \u0111o ph\u1ea3n x\u1ea1 quang h\u1ecdc mi\u1ec1n th\u1eddi gian (OTDR):<\/strong> B\u1ea1n c\u00f3 th\u1ec3 coi n\u00f3 nh\u01b0 m\u1ed9t radar cho s\u1ee3i quang c\u1ee7a b\u1ea1n. N\u00f3 g\u1eedi c\u00e1c xung \u00e1nh s\u00e1ng qua c\u00e1p v\u00e0 \u01b0\u1edbc t\u00ednh l\u01b0\u1ee3ng \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i. Ngo\u00e0i ra, OTDR c\u0169ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c v\u1ecb tr\u00ed c\u00e1c \u0111i\u1ec3m y\u1ebfu, \u0111i\u1ec3m \u0111\u1ee9t ho\u1eb7c \u0111i\u1ec3m u\u1ed1n cong.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXeHPJyPkm7RUxtHwQspQsaV89Xdk1CsbIDaM2EBOQiobfzyt0ZZk-bBOPDddi8G8LHlR2paPSnKY9fOu2FniqgKfYIA9g82sEttYmjAqYrDUNFGgok0Qi5EiwZpEnwr7wdkQHHwRQ?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"M\u00e1y \u0111o ph\u1ea3n x\u1ea1 mi\u1ec1n th\u1eddi gian quang h\u1ecdc (OTDR)\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 3 M\u00e1y \u0111o ph\u1ea3n x\u1ea1 mi\u1ec1n th\u1eddi gian quang h\u1ecdc (OTDR)<\/em><\/p>\n\n\n\n<p><strong>ii) Ph\u01b0\u01a1ng ph\u00e1p c\u1eaft gi\u1ea3m: <\/strong>K\u1ef9 thu\u1eadt n\u00e0y bao g\u1ed3m vi\u1ec7c truy\u1ec1n \u00e1nh s\u00e1ng qua s\u1ee3i quang v\u00e0 \u0111o l\u01b0\u1ee3ng \u00e1nh s\u00e1ng c\u00f2n l\u1ea1i t\u1ea1i c\u00e1c c\u1ed5ng v\u00e0o v\u00e0 ra. K\u1ef9 thu\u1eadt n\u00e0y c\u00f3 \u0111\u1ed9 tin c\u1eady cao, tuy nhi\u00ean, do c\u1ea7n ph\u1ea3i c\u1eaft s\u1ee3i quang n\u00ean m\u1ed9t ph\u1ea7n nh\u1ecf s\u1ebd b\u1ecb l\u00e3ng ph\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXdX0d09OTiMIMxe1yVa8wq4UK1Kes2ZBczvZqxnvpY6hKJGkeca8Rd083HSpsuXzU0sWvX8KfuOBL35IWaUP_Sfmm9Ej9LPE8RaIIDo6xhHC0l3Sl22JL78EdKP8Pwxzvzxqz5V?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"Ph\u01b0\u01a1ng ph\u00e1p c\u1eaft gi\u1ea3m\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 4 Ph\u01b0\u01a1ng ph\u00e1p c\u1eaft gi\u1ea3m<\/em><\/p>\n\n\n\n<p><strong>iii) \u0110o l\u01b0\u1eddng b\u1eb1ng c\u00f4ng t\u01a1 \u0111i\u1ec7n:<\/strong> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng ngu\u1ed3n s\u00e1ng c\u00f9ng v\u1edbi \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t \u0111\u1ec3 \u0111o \u00e1nh s\u00e1ng c\u00f3 \u1edf \u0111\u1ea7u cu\u1ed1i c\u1ee7a c\u00e1p. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01a1n gi\u1ea3n v\u00e0 do \u0111\u00f3 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng trong qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp ban \u0111\u1ea7u v\u00e0 b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean c\u1ee7a m\u1ea1ng c\u00e1p quang.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXdUiPCTnK0zwdy59WBKIbi8zHodxO_aFgKC4ZD3wMZeGlbWD-g1tLtw3bKnHNOoqhnGxxopeGRuR7wBh6pea7iTWZWiuwjGVh7LqgLO4wrkq6Kxn9GWOgvnin-odTyf1O_ElJsjOA?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"M\u00e1y \u0111o c\u00f4ng su\u1ea5t quang\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 5 M\u00e1y \u0111o c\u00f4ng su\u1ea5t quang<\/em><\/p>\n\n\n\n<p>Do \u0111\u00f3, b\u1eb1ng c\u00e1ch ki\u1ec3m tra \u0111\u1ed9 suy gi\u1ea3m \u0111\u1ecbnh k\u1ef3, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ee3i quang lu\u00f4n \u1edf t\u00ecnh tr\u1ea1ng t\u1ed1i \u01b0u v\u00e0 ti\u1ebfp t\u1ee5c t\u1ea1o \u0111i\u1ec1u ki\u1ec7n truy\u1ec1n d\u1eef li\u1ec7u nhanh ch\u00f3ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>4) Quang h\u1ecdc<\/em><\/strong><strong><em> T\u00ednh to\u00e1n m\u1ea5t s\u1ee3i quang&nbsp;<\/em><\/strong><\/h2>\n\n\n\n<p>B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 <a href=\"https:\/\/www.fs.com\/blog\/understanding-fiber-loss-what-is-it-and-how-to-calculate-it-3792.html\" target=\"_blank\" rel=\"noreferrer noopener\">t\u00ednh to\u00e1n suy hao s\u1ee3i quang<\/a> b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp d\u01b0\u1edbi \u0111\u00e2y;<\/p>\n\n\n\n<p><strong>M\u1ea5t m\u00e1t (dB) = 10 \u00d7 log\u206110 (P<\/strong><strong>TRONG&nbsp; <\/strong><strong>\/P<\/strong><strong>ngo\u00e0i <\/strong><strong>)&nbsp;<\/strong><\/p>\n\n\n\n<p>\u1ede \u0111\u00e2u:&nbsp;<\/p>\n\n\n\n<p><strong>P<\/strong><strong>TRONG <\/strong><strong>&nbsp;<\/strong>= C\u00f4ng su\u1ea5t \u0111\u1ea7u v\u00e0o ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u l\u00fac \u0111\u1ea7u.<\/p>\n\n\n\n<p><strong>P<\/strong><strong>ngo\u00e0i<\/strong><strong> <\/strong>&nbsp;= C\u00f4ng su\u1ea5t \u0111\u1ea7u ra ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u \u1edf cu\u1ed1i.&nbsp;<\/p>\n\n\n\n<p>Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, \u0111\u01a1n v\u1ecb \u0111o l\u00e0 decibel (dB), ngh\u0129a l\u00e0 m\u1ee9c \u0111\u1ed9 m\u1ea5t t\u00edn hi\u1ec7u.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>V\u00ed d\u1ee5 t\u00ednh to\u00e1n<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<p>Gi\u1ea3 s\u1eed c\u00f4ng su\u1ea5t \u0111\u1ea7u v\u00e0o c\u1ee7a b\u1ea1n l\u00e0 1mW v\u00e0 c\u00f4ng su\u1ea5t \u0111\u1ea7u ra l\u00e0 0,5mW. T\u1ed5n th\u1ea5t ph\u00e1t sinh \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau:<\/p>\n\n\n\n<p>M\u1ea5t m\u00e1t = 10 \u00d7 log10 ( 1\/0,5 ) =10 \u00d7 log10 ( 2 ) = 3 dB M\u1ea5t m\u00e1t&nbsp;<\/p>\n\n\n\n<p>Do \u0111\u00f3, \u0111i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn m\u1ea5t 3 dB c\u00f4ng su\u1ea5t t\u00edn hi\u1ec7u.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><em>M\u1ea5t m\u00e1t tr\u00ean m\u1ed7i kilomet<\/em><\/strong><\/li>\n<\/ul>\n\n\n\n<p>H\u01a1n n\u1eefa, n\u1ebfu b\u1ea1n mu\u1ed1n t\u00ecm \u0111\u1ed9 suy gi\u1ea3m tr\u00ean m\u1ed7i Kil\u00f4m\u00e9t, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp b\u00ean d\u01b0\u1edbi!<\/p>\n\n\n\n<p><strong>\u0110\u1ed9 suy gi\u1ea3m (db\/km) = T\u1ed5ng t\u1ed5n th\u1ea5t\/ Chi\u1ec1u d\u00e0i s\u1ee3i quang<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>5) M\u1eb9o \u0111\u1ec3 gi\u1ea3m thi\u1ec3u <\/em><\/strong><strong><em>M\u1ea5t s\u1ee3i<\/em><\/strong><\/h2>\n\n\n\n<p>In this section, I\u2019ll share with you some useful tips which you can utilize to enjoy your internet without facing signal loss problems. So, let&#8217;s get started!<\/p>\n\n\n\n<p><strong>?<\/strong><strong> S\u1eed d\u1ee5ng ch\u1ea5t x\u01a1 ch\u1ea5t l\u01b0\u1ee3ng: <\/strong>Nh\u01b0 th\u01b0\u1eddng l\u1ec7, b\u1eaft \u0111\u1ea7u v\u1edbi nh\u1eefng v\u1eadt li\u1ec7u t\u1ed1t nh\u1ea5t l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft. M\u1ed9t s\u1ed1 trong s\u1ed1 ch\u00fang c\u00f3 nh\u1eefng khuy\u1ebft \u0111i\u1ec3m nh\u1ecf s\u1ebd h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng v\u00e0 l\u00e0m suy y\u1ebfu t\u00edn hi\u1ec7u, nh\u01b0 m\u1ed9t s\u1ed1 lo\u1ea1i c\u00e1p quang. V\u00ec v\u1eady, h\u00e3y ch\u1ecdn k\u00ednh silica si\u00eau tinh khi\u1ebft, v\u00ec n\u00f3 \u0111\u01b0\u1ee3c tinh ch\u1ebf r\u1ea5t c\u1ea9n th\u1eadn \u0111\u1ec3 lo\u1ea1i b\u1ecf m\u1ecdi t\u1ea1p ch\u1ea5t, ngay c\u1ea3 ion OH.<\/p>\n\n\n\n<p><strong>? <\/strong><strong>X\u1eed l\u00fd c\u1ea9n th\u1eadn:<\/strong> H\u01a1n n\u1eefa, t\u00f4i ph\u1ea3i n\u00f3i r\u1eb1ng h\u00e0nh \u0111\u1ed9ng c\u1ee7a b\u1ea1n n\u00ean b\u1ed5 sung cho thi\u1ebft k\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng quang h\u1ecdc. H\u00e3y coi c\u00e1p quang nh\u01b0 m\u1ed9t \u1ed1ng h\u00fat th\u1ee7y tinh r\u1ea5t m\u1ecfng manh. B\u1ea1n c\u00f3 bi\u1ebft r\u1eb1ng u\u1ed1n cong \u1ed1ng h\u00fat qu\u00e1 nhi\u1ec1u s\u1ebd d\u1eabn \u0111\u1ebfn m\u1ea5t m\u00e1t kh\u00f4ng? V\u00ec v\u1eady, ch\u00fang t\u00f4i khuy\u00ean b\u1ea1n n\u00ean tr\u00e1nh c\u00e1c g\u00f3c s\u1eafc nh\u1ecdn v\u00e0 d\u00e2y bu\u1ed9c ch\u1eb7t c\u00f3 th\u1ec3 n\u00e9n s\u1ee3i v\u00ec ch\u00fang c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng cong cho t\u00edn hi\u1ec7u v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 t\u00edn hi\u1ec7u y\u1ebfu h\u01a1n.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXcxaSTsj6C8jKIWsqLBCzSPVKByo3lNHdh73iut0dw4Pr64NBPWrkGv8zTWOfszVt3o7__fhXxdnJrXNFhAlDchrGP1vVpbR4zUn-1q-jjmG1QrAY2NJCzbOAt3XqcpCLeD6cmp?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"Ki\u1ec3m tra c\u00e1p th\u01b0\u1eddng xuy\u00ean\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 6 Ki\u1ec3m tra c\u00e1p th\u01b0\u1eddng xuy\u00ean<\/em><\/p>\n\n\n\n<p><strong>? <\/strong><strong>S\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i v\u00e0 m\u1ed1i n\u1ed1i t\u1ed1t:<\/strong> H\u01a1n n\u1eefa, h\u00e3y nh\u1edb r\u1eb1ng t\u00edn hi\u1ec7u c\u1ee7a b\u1ea1n s\u1ebd gi\u1ea3m n\u1ebfu \u0111\u1ea7u n\u1ed1i c\u1ee7a b\u1ea1n b\u1ecb b\u1ea9n ho\u1eb7c kh\u00f4ng th\u1eb3ng h\u00e0ng. H\u00e3y \u0111\u1ea3m b\u1ea3o b\u1ea1n v\u1ec7 sinh ch\u00fang tr\u01b0\u1edbc khi c\u1eafm v\u00e0o. Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c n\u1ed1i s\u1ee3i quang, t\u00f4i khuy\u00ean b\u1ea1n n\u00ean n\u1ed1i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00e0n n\u00f3ng ch\u1ea3y (l\u00e0m n\u00f3ng ch\u1ea3y c\u00e1c \u0111\u1ea7u l\u1ea1i v\u1edbi nhau). \u0110i\u1ec1u n\u00e0y l\u00e0 do, khi s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, b\u1ea1n s\u1ebd m\u1ea5t \u00edt h\u01a1n kho\u1ea3ng 0,1 dB so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p n\u1ed1i c\u01a1 h\u1ecdc, c\u00f3 m\u1ee9c m\u1ea5t m\u00e1t l\u00e0 0,2-0,75 dB.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXeiiRoOliIadpCxFw9l1XEYb1VmBc3aTlEvJhh-k69qyZ6Wpcqa0Pr1Xm6l1PYCQAsfZcy-RMcia30cy3I-pPcebW01SMPyIvjSwnw7paYQUa6aDBBjToWCGbzpaSNqyYpIMDfvxw?key=9dHdCVCjhUrCe1WtFXhQZIEI\" alt=\"N\u1ed1i c\u00e1p quang b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00e0n nhi\u1ec7t\"\/><\/figure>\n\n\n\n<p><em>H\u00ecnh s\u1ed1 7 N\u1ed1i c\u00e1p quang b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00e0n nhi\u1ec7t<\/em><\/p>\n\n\n\n<p><strong>? Ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean: <\/strong>Cu\u1ed1i c\u00f9ng,<strong> <\/strong>th\u1ef1c hi\u1ec7n ki\u1ec3m tra ngay c\u1ea3 khi s\u1ee3i quang c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t ho\u00e0n h\u1ea3o. C\u00f3 th\u1ec3 ki\u1ec3m tra b\u1eb1ng OTDR ho\u1eb7c \u0111\u1ed3ng h\u1ed3 \u0111o c\u00f4ng su\u1ea5t \u0111\u1ec3 t\u00ecm \u0111i\u1ec3m y\u1ebfu. H\u01a1n n\u1eefa, vi\u1ec7c v\u1ec7 sinh v\u00e0 ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean c\u00e1c \u0111\u1ea7u n\u1ed1i c\u1ee7a b\u1ea1n s\u1ebd lo\u1ea1i b\u1ecf m\u1ecdi t\u1ed5n th\u1ea5t kh\u00f4ng c\u1ea7n thi\u1ebft, do \u0111\u00f3 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong><em>6) Ph\u00e1n quy\u1ebft cu\u1ed1i c\u00f9ng<\/em><\/strong><\/h2>\n\n\n\n<p>B\u00e2y gi\u1edd b\u1ea1n \u0111\u00e3 bi\u1ebft r\u1eb1ng m\u1ea5t m\u00e1t v\u00e0 suy gi\u1ea3m t\u00edn hi\u1ec7u c\u00e1p quang c\u00f3 th\u1ec3 c\u1ea3n tr\u1edf t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u1ea1ng. Tin t\u1ed1t l\u00e0 c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u \u0111\u01b0\u1ee3c. B\u1ea1n ch\u1ec9 c\u1ea7n s\u1eed d\u1ee5ng c\u00e1p quang ch\u1ea5t l\u01b0\u1ee3ng, x\u1eed l\u00fd c\u1ea9n th\u1eadn, \u0111\u1ea7u n\u1ed1i t\u1ed1t v\u00e0 h\u01a1n n\u1eefa l\u00e0 ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean s\u1ebd \u0111\u1ea3m b\u1ea3o t\u00edn hi\u1ec7u m\u1ea1nh. M\u1eb7c d\u00f9 c\u00e1p quang mang l\u1ea1i t\u1ed1c \u0111\u1ed9 v\u00e0 hi\u1ec7u qu\u1ea3, tuy nhi\u00ean ti\u1ec1m n\u0103ng th\u1ef1c s\u1ef1 c\u1ee7a ch\u00fang ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e1t huy khi \u0111\u01b0\u1ee3c ch\u0103m s\u00f3c \u0111\u00fang c\u00e1ch. Do \u0111\u00f3, \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i m\u01b0\u1ee3t m\u00e0 trong nhi\u1ec1u n\u0103m.\u00a0<br>H\u01a1n n\u1eefa, t\u00f4i mu\u1ed1n gi\u1edbi thi\u1ec7u b\u1ea1n <a href=\"https:\/\/dekam-fiber.com\/vi\/buy-fibre-optic-cable\/\" target=\"_blank\" rel=\"noreferrer noopener\">mua c\u00e1p quang<\/a> t\u1eeb Dekam Fibres. S\u1ee3i quang c\u1ee7a ch\u00fang t\u00f4i \u0111\u00e3 v\u01b0\u1ee3t qua CE, ROHS v\u00e0 c\u00e1c ch\u1ee9ng nh\u1eadn chuy\u00ean nghi\u1ec7p kh\u00e1c. Do \u0111\u00f3, \u0111\u1ea3m b\u1ea3o r\u1eb1ng s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t v\u00e0 an to\u00e0n. V\u00ec v\u1eady, h\u00e3y truy c\u1eadp trang web c\u1ee7a ch\u00fang t\u00f4i ngay h\u00f4m nay!<\/p>","protected":false},"excerpt":{"rendered":"<p>Nowadays, the high-speed transfer of data around the globe depends on fibre optics, but signal loss and attenuation can cause issues. If these losses are not managed, your network may face slow speeds and reduced performance. However, stay calm! There is a good news that loss can be minimized. Therefore, [&hellip;]<\/p>","protected":false},"author":1,"featured_media":18659,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Learn About Fibre Optic Signal Loss and Attenuation","_seopress_titles_desc":"","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-18656","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/posts\/18656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/comments?post=18656"}],"version-history":[{"count":4,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/posts\/18656\/revisions"}],"predecessor-version":[{"id":18682,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/posts\/18656\/revisions\/18682"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/media\/18659"}],"wp:attachment":[{"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/media?parent=18656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/categories?post=18656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dekam-fiber.com\/vi\/wp-json\/wp\/v2\/tags?post=18656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}