Kev sib kis deb ntawm ib hom fiber ntau: 64-channel kis ntawm 40G Ethernet tuaj yeem ntev li 2,840 mais ntawm ib hom kab hluav taws xob.Ib hom fiber ntau yog tsim los ntawm cov tub ntxhais, txheej txheej cladding thiab txheej txheej.Cov tub ntxhais yog ua los ntawm cov khoom siv pob tshab heev.Cov cladding muaj qhov cuam tshuam qhov ntsuas me me me dua cov tub ntxhais, ua rau muaj qhov cuam tshuam ntawm qhov muag pom kev uas tso cai rau feem ntau. ntawm cov electromagnetic teb yuav tsum tau daig rau hauv cov tub ntxhais.Cov txheej txheem ua los tiv thaiv Cov fiber ntau yog tiv thaiv los ntawm ya raws thiab mechanical abrasion, thaum ua kom cov elasticity ntawm fiber ntau.Sab nraum txheej txheej, ib lub tsho yas feem ntau ntxiv.
Dab tsi yog qhov txawv ntawm ib hom fiber ntau thiab multimode fiber ntau?
Qhov sib txawv ntawm qhov ntsuas qhov taw qhia: Ib hom fibers siv cov kauj ruam index profile.Multimode fibers siv tau cov kauj ruam index profiles los yog graded index profiles.Yog li ntawd, quartz fibers kuj feem ntau siv multimode kauj ruam index fibers, multimode graded index fibers, thiab ib hom kauj ruam index fibers.Peb hom.
Qhov sib txawv ntawm hom kis tau tus mob: ib hom fiber ntau tsuas yog kis tau ib hom rau ib qho kev khiav hauj lwm wavelength, thiab multimode fiber ntau kis tau ob peb hom.Qhov propagation ntawm electromagnetic tsis nyob rau hauv lub optical fiber belongs rau lub dielectric ncig waveguide.Thaum lub teeb yog tag nrho reflected ntawm lub interface ntawm nruab nrab, lub electromagnetic yoj nyob rau hauv lub nruab nrab, uas yog hu ua coj yoj los yog coj hom.Rau ib qho kev qhia nthwv dej thiab kev ua haujlwm wavelength, muaj ntau yam xwm txheej uas ua rau muaj kev xav tau ntawm tag nrho cov kev xav, hu ua cov qauv sib txawv ntawm cov coj tsis muaj zog.Muab faib ua multimode fiber ntau thiab ib hom fiber ntau hauv hom kis tau tus mob.
Qhov sib txawv ntawm kev sib kis: qhov sib kis deb thiab kis tau tus mob bandwidth ntawm ib hom fiber ntau yog pom tseeb vim multimode fiber ntau.Yog tias qhov kis tau tus mob ntau dua 5 km, qhov loj-band cov ntaub ntawv teeb liab raug xa mus rau lub sijhawm ntev los xaiv ib hom fiber ntau.Yog tias qhov kev sib kis deb tsuas yog ob peb mais, ntau hom yog qhov kev xaiv zoo tshaj plaws vim tias LED transmitter/receiver xav tau lub teeb laser dua li ib hom.Nws yog pheej yig dua.
Qhov sib txawv ntawm wavelength ntawm fiber ntau kis tau tus mob: ib hom fiber ntau muaj ib tug me me txoj kab uas hla thiab tsuas yog kis tau nyob rau hauv ib tug tib hom ntawm ib tug muab kev khiav hauj lwm wavelength, nrog ib tug kis tau tus mob bandwidth thiab muaj peev xwm kis tau tus mob loj.Multimode fiber ntau yog ib qho khoom siv kho qhov muag uas tuaj yeem xa mus ib txhij hauv ntau hom ntawm kev ua haujlwm wavelength.Multimode fiber ntau muaj kev sib kis tsis zoo dua li ib hom fiber ntau.