Xyoo tas los no, ib hom fiber ntau tshiab, G.654E, tau siv rau hauv qee cov kab txuas ntev thiab tau ua tiav cov txiaj ntsig zoo. Yog li, G.654E fiber ntau yog dab tsi? Puas yog G.654E fiber hloov G.652D fiber ib txwm muaj?
Nyob rau nruab nrab xyoo 1980, kom ua tau raws li qhov xav tau kev sib txuas lus ntev ntawm cov kab hluav taws xob fiber optic hauv qab dej, ib hom fiber ntau optical nrog lub hauv paus silica ntshiab thiab qhov ntev ntawm 1550 nm tau tsim. Nws qhov kev txo qis ze ntawm qhov ntev no yog 10% qis dua li ntawm Cov khoom siv fiber optic G.652 saum toj no.
Hom fiber no yog txhais tias yog G.654 fiber, thiab nws lub npe thaum lub sijhawm ntawd yog "yam tsawg kawg nkaus attenuation ib hom fiber nrog lub wavelength ntawm 1550 nm".
Xyoo 1990, WDM thev naus laus zis tau pib siv rau hauv cov kab ke sib txuas lus hauv qab dej. WDM thev naus laus zis tso cai rau kev sib kis ntawm ntau kaum lossis ntau pua lub channel optical hla ib lub fiber optical, thiab nrog kev siv cov fiber optic amplifiers, lub zog siab, ntau lub wavelength optical teeb liab tau txuas rau hauv ib lub fiber thiab ua ke ntawm qhov sib txuas me me. Cov teeb liab no qhia txog cov yam ntxwv nonlinear.
Vim yog qhov cuam tshuam tsis zoo ntawm cov fiber ntau optical, thaum lub zog optical nkag mus rau hauv fiber ntau dua ib qho nqi, qhov kev ua tau zoo ntawm kev sib kis ntawm lub kaw lus yuav maj mam txo qis nrog kev nce ntxiv ntawm lub zog optical nkag mus rau hauv fiber.
Qhov cuam tshuam tsis yog linear ntawm cov fiber ntau optical muaj feem cuam tshuam nrog lub zog optical ceev ntawm cov fiber core. Thaum lub zog optical nkag mus tas li, kev nce thaj chaw hla ntawm cov fiber ntau optical thiab txo qhov ceev ntawm lub zog optical ntawm cov fiber core tuaj yeem txo qhov cuam tshuam ntawm cov nyhuv nonlinear rau kev ua haujlwm kis. Yog li ntawd, G.654 optical fiber pib tsim kev tsis sib haum xeeb vim nws qhov chaw hla ntawm cov fiber ntau zoo dua.
Kev nce thaj chaw zoo ntawm cov fiber yuav ua rau muaj kev nce ntxiv ntawm qhov cutoff wavelength, tab sis qhov nce ntawm qhov cutoff wavelength yuav tsum tau tswj kom tsis txhob cuam tshuam rau kev siv cov fiber hauv C band (1530nm ~ 1565nm), yog li ntawd, qhov cutoff wavelength ntawm G.654 fiber yog teeb tsa ntawm 1530nm.
Xyoo 2000, thaum ITU tau kho dua G.654 tus qauv fiber ntau optical, nws tau hloov lub npe mus rau "txiav wavelength-hloov ib hom fiber ntau optical".
Txog rau tam sim no, G.654 optical fiber tau ua cim los ntawm kev txo qis thiab thaj chaw ua haujlwm loj. Tom qab ntawd, G.654 optical fiber siv rau kev sib txuas lus hauv qab dej tau ua kom zoo tshaj plaws rau kev txo qis thiab thaj chaw ua haujlwm, thiab maj mam tsim mus rau plaub pawg me: A, B, C, thiab D.
Lub sijhawm tshaj tawm: Lub Ib Hlis-10-2023
