Yas fiber ntau cov khoom siv
Cov kev mob theem pib ntawm cov tub ntxhais thiab cov khoom siv xau siv rau yas kho qhov muag ua kom zoo yog lub teeb xa hluav taws xob, uas yog, lub teeb xa hluav taws xob ntawm lub polymer yuav tsum muaj ntau dua 90%. Lub siab dua lub teeb xa, qhov qis dua qhov kis poob ntawm cov yas optical fiber ntau. Feem ntau ntawm cov polymers uas muaj lub teeb xa hluav taws xob zoo yog cov qauv amorphous, isotropic, tsis txhob muaj cov chromophore pab pawg, thiab muaj cov teeb tsa ua kev sib cais [1]. Raws li cov khoom siv tseem ceeb, cov tshuaj pleev ib txwm yog: polymethylmethacrylate (PMMA), polystyrene (PS), polycarbonate (PC).
Yas optical fiber rau kev sib txuas lus
Cov yas fiber ntau feem ntau hu ua" liab qab fiber ntau" ;. Vim tias nws tsis tiv thaiv txheej xim, nws yooj yim puas ntsoog. Yog li no, cov yas kho qhov muag fiber siv rau kev sib txuas lus yog qhov tseeb ntawm cov yas kho qhov muag fiber cable txuas nrog yas, ib yam li tooj liab cable thiab quartz siv rau kev sib txuas lus. Tib yam rau cov xaim hluav taws xob. Txhawm rau xa cov ntaub ntawv, optical fiber (cable) kuj yuav tsum tau tsim kho qhov muag xa hluav taws xob nrog lwm qhov chaw. Kev kho qhov muag hluav taws xob tsis zoo muaj peb ntu. Cov txheej txheem ua haujlwm ntawm kev xa xov hluav taws xob yog nqa tawm ntawm lub tshuab xa hluav taws xob, cov kab hluav taws xob thiab cov twj txais. Lub tshuab xa hluav taws xob hloov lub teeb liab hluav taws xob nkag mus rau lub teeb liab kho qhov muag, thiab cov teeb liab hloov kho tau xa los ntawm cov kab hluav taws xob xa mus rau cov cuab yeej txais-qhov kho qhov muag, thiab cov txais hluav taws xob tau txais cov teeb liab kho tshiab tau los ntawm optical fiber mus rau hluav taws xob teeb liab. Cov.
Kom paub txog qhov kev sib txuas lus fiber ntau, qhov teeb meem tseem ceeb yog kom txo qis kev sib kis ntawm cov hluav taws xob fiber ntau kom ntau li ntau tau, thiaj li ua kom paub tseeb tias cov hluav taws xob optical fiber muaj qee qhov kev sib kis tau. Thaum lub teeb nkag los ntawm ib qho kawg ntawm lub fiber ntau thiab tawm los ntawm lwm qhov kawg, qhov siv ntawm lub teeb yuav tsis muaj zog. Qhov no txhais tau hais tias tom qab lub teeb liab hluav taws xob kis tau los ntawm cov hluav taws xob kho qhov muag, lub teeb hluav taws xob tau ua qee yam. Qhov no qhia tau hais tias muaj qee yam muaj nyob hauv fiber ntau kho qhov muag lossis rau qee qhov laj thawj, thaiv qhov kev hla ntawm cov phiaj xwm kho qhov muag, uas yog qhov kev xa tawm ntawm cov kab nrig kho qhov muag. Tsuas yog los ntawm kev txo cov kab hluav taws xob tuaj yeem ua kom lub teeb liab kho qhov muag tsis muaj kev cuam tshuam.
Lub hauv paus tseem ceeb uas ua rau lub fiber ntau kis tau kis tsis tau (ua kom pom tseeb) yog: sib txuam, khoov, nyem, impurities, tsis sib xws thiab pob tw.
1) Intrinsic: Nws yog xam qhovkev poob ntawm optical fiber, suav nrog: Rayleigh tawg, qhov to xam qhov nqus, thiab lwm yam.
2) Dabtsi Yog Khoov: Thaum cov fiber ntau khoov, ib feem ntawm lub teeb hauv lub fiber ntau yuav ploj vim tawg, ua rau poob.
3) Caws: Cov ua rau tshwm sim los ntawm me ntsis khoov thaum lub ntsej muag kho qhov muag.
4) Qhov tsis zoo: Kev cuam tshuam hauv cov hluav taws xob fiber ntau nqus thiab tawg lub teeb tawm hauv cov hluav taws xob optical thiab ua rau poob.
5) Tsis-Tsis Coj Kev Txheeb: Poob los ntawm tsis yog-tsis zoo sib xws tsis zoo ntawm cov khoom siv fiber ntau.
6) Taub qab kev txuas: poob los ntawm lub pob tw taub, xws li: txawv axis, kawg ntsej muag tsis yog txiav mus rau lub axis, ntsej muag tsis ncaj kawg, mismatched taub qab lub taub thiab tsis zoo splicing zoo, thiab lwm yam Tom qab ntawd qhov poob ntsig txog cov khoom nws tus kheej yog qhov poob los ntawm kev nqus thiab tawg ntawm lub teeb tawm hauv cov fiber ntau hauv cov khoom siv. Qhov poob ntawm qhov kho qhov muag hluav taws xob tau qhia los ntawm qhov poob coefficient a, uas yog txhais raws li tus lej ntawm cov lej ntawm cov xaim hluav taws xob tsis txaus nyob rau ib mais, hauv dB / km. Nyob rau tam sim no, cov poob qis yas optical fiber ntau uas tau tsim ntau hauv khw thoob ntiaj teb yog hais txog cov yas optical fiber ntau nrog kev poob< 200db="">
