Optical fiber yog lub pob tshab, muag, cov khoom khov iav. Nws muaj lub hauv paus, ib qho nplaum thiab ib txheej. Nws tuaj yeem raug siv ua lub cuab yeej xa hluav taws xob.
ITU-T pom zoo rau kev faib tawm: G.651, G.652, G.653, G.654, G.655, G.656, G.657
SMF (Ib Hom Fiber) ib hom fiber ntau hom muaj raws li nram no:
-G.652 (kev tawg tsis hloov ua ib hom fiber ntau)
-G.653 (tawg yooj yim-hloov fiber ntau)
-G.654 (hlais tawm nthwv dej hloov mus ua kua)
-G.655 (tsis tawg-tawg dispersion-hloov fiber ntau)
-G.656 (qis-nqes-tsis-xoom dispersion-hloov fiber ntau)
-G.657 (khoov-resistant fiber ntau)
G.652 dispersion tsis hloov chaw ntawm ib hom fiber ntau
G.652 fiber ntau yog cov tshuaj siv ua ib hom fiber ntau nrog qhov luv tshaj plaws ntuag cov kab hluav taws xob, uas siv tau rau ob qho tib si 1550nm thiab 1310nm.
Thaum ua haujlwm nthwv cua ua haujlwm yog 1310 nm, cov fiber ntau dispersion me me, thiab cov dispersion coefficient D yog 0 ～ 3.5 ps / nm · km. Kev sib kis deb ntawm lub system tsuas yog txiav los ntawm cov fiber ntau attenuation. Txawm li cas los xij, qhov poob loj heev, kwv yees li 0.3 txog 0.4 dB / km.
Qhov poob ntawm qhov ua haujlwm nthwv ntawm 1550 nm yog me me, li 0.19 txog 0.25 dB / km, tab sis qhov kev tawg ua loj, kwv yees li 20 ps / nm · km.
Cov kab hluav taws xob no tuaj yeem siv rau hauv 2.5Gbps systems hauv 1550nm band, tab sis vim yog qhov kev sib kis loj hauv cov kab paj nruag no, yog tias lub teeb liab 10Gbps kis tau thiab qhov kis mus deb tshaj 50 km, yuav tsum siv cov qauv kev faib nyiaj dispersion.
.G.652 optical fiber yog ib hom optical fiber ntau nrog ntau daim ntawv thov. ITU-T faib cov G.652 rau 4 hom optical fiber ntau: G.652.A, B, C, thiab D.
G.652.A fiber
Kev xa tawm ntau tshaj yog 2.5Gbps
G.652.B fiber
Qhov siab tshaj plaws yog 10Gbps. Kev them nyiaj rau kev faib tawm yuav tsum tau ua rau qhov xa ntau tshaj. Nws yog tsim rau cov ntawv thov nrog wavelengths ntawm 1310nm / 1550nm / 1625nm. Xws li cov fibers muaj peev me me thiab poob me me.
G.652.C fiber
Cov cuab yeej chirp yog qhov tseem ceeb ib yam li G.652A, tab sis qhov sib txuas ntawm qhov tsis sib xws yog qis dua ntawm 1550nm, thiab cov dej nqus dej siab nyob ze 1380nm yog tshem tawm. Tuaj yeem ua haujlwm 1360nm ~ 1530nm band.
G.652.D fiber
Cov khoom ntiag tug yog ib qho zoo ib yam li G.652B fiber, thiab attenuation coefficient yog tib yam li G.652C fiber, uas yog, nws tuaj yeem ua haujlwm hauv 1360nm ~ 1530nm band. Nws yog qhov nruj tshaj plaws ntawm txhua qib G.652 thiab qib nrawm rov qab sib xyaw.
G.653 dispersion-hloov fiber ntau
G.653 Cov Khoom Taw Qhia Hloov Cov Hluav Taws Xob (DSF, Kev Xa Cov Khoom Siv Hluav Taws Xob), raws li G.652 fiber, txav lub xoom dispersion kis ntawm 1 310 nm rau 1 550 nm. Cov kev txwv ntawm lub system.
Cov fiber no yog qhov tsim nyog rau kev deb, ib leeg-channel, kev sib txuas lus high-speed optical fiber ntau. Piv txwv li, 20G b / s system tuaj yeem qhib ncaj qha rau ntawm no fiber ntau yam tsis tas yuav tsum muaj kev ntsuas kev nplua nyiaj. Txawm li cas los xij, vim kev siv EDFA hauv DWDM, lub zog kho qhov muag nkag mus rau hauv lub fiber muaj tau zoo heev. Plaub nthwv dej sib xyaw ua rau los ntawm cov kab tsis xws xim ntawm cov fiber muaj qhov cuam tshuam loj rau DWDM system ntawm G.653 fiber. G.653 tsis tau siv dav siv. Kev nce qib. Lub ntsiab yog vim li cas hauv qhov 1 550 nm lub qhov rais, qhov kev tawg ntawm G.653 yog tsawg heev, thiab nws yog qhov yooj yim los tsim ntau yam optical nonlinear nyhuv tes hauj lwm.
G.654 ntuag luv nthwv dej hloov ua cov fiber ntau
G.654 fiber ntau yog cov fiber ntau nrog qhov poob qis me me ntawm 1550nm wavelength. Nws yog tsuas yog siv rau kev sib txuas lus fiber ntau submarine uas yuav tsum tau muaj kev ncua deb ntev. Cov kab ke sib txuas lus kho qhov muag fiber ntau.
G.655 tsis-xoom dispersion pauv fiber ntau
G.655 Tsis-xoom Dispersion Hloov Fibre (NZDSF, NonZero Dispersion Shred Fiber) muaj qhov tsim nyog thiab tsis tshua muaj tawg nyob rau hauv 1 550 nm lub qhov rais, tuaj yeem txo qhov tsis-tawm los xws li plaub-yoj sib xyaw thiab cov phiaj xwm hla mus, thiab tuaj yeem pab txhawb nqa ntev mus Kev xa mus deb thaum ua kom tsawg rau kev sib koom tes sib faib khoom sib cais.
Qes qhov qis dispersion G.655 fiber ntau muaj tus nqi dispersion tsawg dua 0.05 ps / nm · km, tus nqi dispersion ntawm 2.6 txog 6.0 ps / nm · km hauv qhov ntev ntawm 1 530 txog 1 565 nm, thiab qhov ntev yoj ntawm 1 565 txog 1 625 nm. Tus nqi dispersion yog 4.0 txog 8.6 ps / nm · km.
G.656 qis-nqes-tsis yog xoom dispersion-hloov lub fiber
G.656 fiber yog tsim los txuas ntxiv nthuav dav siv hluav taws xob ntau ntawm cov tshuab DWDM, Hom fiber ntau tshiab, uas tswj cov tsis muaj xoom dispersion hauv S (1460 ~ 1530 nm), C (1 530 ~ 1 565 nm) thiab L (1 565 ~ 1 625 nm) xov tooj cua.
G.657 khoov resistant fiber ntau
G.657 fiber Sib piv nrog lwm hom kev ua cov fiber ntau, qhov tshwj xeeb tseem ceeb tshaj plaws ntawm G.657 fiber yog tias nws tsis tshua zoo los khoov thiab tsis khoov zoo dua.
Raws li lub hauv paus ntsiab lus ntawm kev sib xyaw nrog G.652 optical fiber, G.657 tau faib ua A thiab B optical fibers, thiab qib khoov tau muab faib ua peb theem ntawm 1, 2, thiab 3 raws li txoj cai ntawm yam tsawg kawg nkaus khoov vojvoog.
