Keeb Kwm Taw Qhia
Optical fiber yog qhov nruab nrab zoo thiab hloov tau yooj yim rau kev xa cov kab teeb. Nyob rau hauv cov txheej txheem ntawm kev loj hlob network kev kub ceev, fiber ntau optical yog dav siv nyob rau hauv lub tshav pob ntawm fiber optic kev sib txuas lus los ntawm kev tsim txiaj ntawm nws tus nqi xa mus ceev thiab loj kis tau tus mob. Fiber patch cords, tseem hu ua fiber optic connectors, yog siv los ua kom tiav cov emitting, xa thiab tau txais cov teeb liab kho qhov muag, thiab yog ib qho ntawm feem ntau siv kis xov xwm hauv optical kis tau tus mob. Qhov chaw ntawm lub fiber optic thaj qaum yog lub fiber optic core ua los ntawm quartz iav, nyob ib puag ncig los ntawm ib txheej ntawm Kevlar raws li ib tug tiv thaiv zaj duab xis los ntawm kev puas tsuaj, thiab tom qab ntawd sab nraud yog ib lub tsho yas los ntxiv dag zog rau cov khoom insulating. Raws li cov ntaub ntawv sib txawv ntawm optical yoj kis tau tus mob hauv fiber ntau, fiber ntau optic thaj qaum tuaj yeem muab faib ua ib hom fiber ntau thiab ntau hom fiber ntau.
Cov yam ntxwv ntawm ib hom Fiber
Ib hom fiber ntau yog feem ntau sawv cev rau hauv cov xim daj, nrog xiav txuas thiab lub tes tsho tiv thaiv. Piv nrog rau ntau hom fiber ntau, muaj ib txoj kab uas hla me me ntawm 8μm mus rau 10μm hauv ib hom fiber ntau, uas tiv thaiv cov khib nyiab ntawm optical zog.
Qhov zoo ntawm Single-hom Fiber
① Kev sib kis ntev dua: Ib hom fiber ntau tuaj yeem txhawb nqa cov ntaub ntawv xa mus ntev dua vim lawv qhov qis qis. Piv txwv li, ntau hom fiber ntau feem ntau muaj qhov siab tshaj plaws kis tau tus mob ntawm ob peb puas meters, thaum ib hom fiber ntau tuaj yeem ncav cuag ntau dua 100km.
② Ntau dua bandwidth muaj peev xwm: Ib hom fiber ntau tuaj yeem muab bandwidth siab dua li ntau hom fiber ntau, ua kom cov ntaub ntawv xa mus ceev.
③Tsis muaj inter-mode dispersion: Ib hom fiber ntau tsuas yog kis tau ib hom ntawm lub teeb, yog li tsis muaj inter-hom dispersion, zoo tsis txhob optical zog poob nyob rau hauv lub connector.
④ Cov kis tau tus mob siab dua: vim tsis muaj qhov sib txawv ntawm qhov sib txawv, hom suab nrov thiab qee qhov cuam tshuam, ib hom fiber ntau optic thaj cords tuaj yeem tiv thaiv kev cuam tshuam thiab tuaj yeem xa cov teeb liab ntawm tus nqi siab dua thiab ruaj khov zoo dua.
Disadvantages ntawm Single-hom Fiber
①Coupling yog qhov nyuaj dua: Vim hais tias cov tub ntxhais txoj kab uas hla ntawm ib hom fiber ntau me dua, nws nyuaj dua rau ob peb lub teeb rau hauv ib hom fiber ntau dua li hauv ntau hom fiber ntau.
② Cov nqi tsim khoom ntau dua: Lub teeb ci yog lub teeb ci laser, thiab xav tau ib qho optical transceiver, ob qho tib si yog cov khoom siv kho vajtse kim dua. Yog li ntawd, tus nqi ntawm kev siv ib hom fiber ntau yuav siab dua li ntawm ntau hom fiber ntau.
③ Xav tau kev siv tshuab ntau dua: Kev tsim khoom thiab tuav ib hom fiber ntau nyuaj dua li ntau hom fiber ntau.
④High installation yuav tsum tau: Cov kev cai rau lub installation ib puag ncig yog kuj siab. Thaum ntsia tsis raug, nws yuav ua rau lub interface tsis ua raws li qhov yuav tsum tau ua, yog li kev saib xyuas tshwj xeeb yuav tsum tau them thaum lub sijhawm teeb tsa.
Daim ntawv thov ntawm Single-mode Fiber
Peb yuav tsum coj ob qho tib si qhov sib kis qhov deb thiab tus nqi rau kev txiav txim siab thaum xaiv ib hom fiber ntau lossis ntau hom fiber ntau. Ib hom fiber ntau tuaj yeem xa tawm ib hom ntawm lub teeb nrog inter-hom dispersion, haum rau kev sib txuas lus ntev. Thaum ntau hom fiber ntau tuaj yeem xa ntau hom ntawm lub teeb liab tab sis nrog kev sib cuam tshuam loj dua. Yog tias qhov kev ncua deb tsis tshaj 550 meters, ntau hom fiber ntau muaj qhov ua tau zoo ib yam li ib hom fiber ntau ntawm tus nqi qis. Rau kev ncua deb ntawm ntau txhiab meters lossis ntau dua, ib hom fiber ntau yog qhov kev xaiv zoo tshaj plaws.
