Raws li peb txhua tus paub, multimode fiber ntau feem ntau muab faib ua OM1, OM2, OM3 thiab OM4.Ces yuav ua li cas txog ib hom fiber ntau?Qhov tseeb, hom ntawm ib hom fiber ntau zoo li nyuaj dua li multimode fiber ntau.Muaj ob qhov tseem ceeb ntawm kev qhia tshwj xeeb ntawm ib hom optical fiber ntau.Ib qho yog ITU-T G.65x series, thiab lwm qhov yog IEC 60793-2-50 (tshaj tawm raws li BS EN 60793-2-50).Tsis yog xa mus rau ITU-T thiab IEC cov ntsiab lus, Kuv tsuas yog lo rau qhov yooj yim ITU-T G.65x hauv kab lus no.Muaj 19 qhov sib txawv ib hom kho qhov muag fiber ntau specifications txhais los ntawm ITU-T.
Txhua hom muaj nws tus kheej thaj chaw ntawm daim ntawv thov thiab cov evolution ntawm cov optical fiber specifications qhia qhov evolution ntawm kis tau tus mob system technology los ntawm qhov ntxov tshaj plaws installation ntawm ib hom optical fiber mus txog rau niaj hnub no.Xaiv qhov tsim nyog rau koj qhov project tuaj yeem yog qhov tseem ceeb ntawm kev ua haujlwm, nqi, kev ntseeg siab thiab kev nyab xeeb.Hauv cov ntawv tshaj tawm no, kuv yuav piav qhia me ntsis txog qhov sib txawv ntawm qhov tshwj xeeb ntawm G.65x series ntawm tib hom optical fiber ntau tsev neeg.Cia siab tias yuav pab koj txiav txim siab zoo.
g:652 ua
ITU-T G.652 fiber ntau tseem hu ua tus qauv SMF (ib hom fiber ntau) thiab yog cov khoom siv fiber ntau tshaj plaws.Nws tuaj nyob rau hauv plaub qhov sib txawv (A, B, C, D).A thiab B muaj lub ncov dej.C thiab D tshem tawm cov dej ncov rau kev ua haujlwm puv spectrum.G.652.A thiab G.652.B fibers yog tsim los kom muaj ib tug xoom-dispersion wavelength nyob ze 1310 nm, yog li ntawd lawv yog optimized rau kev khiav hauj lwm nyob rau hauv lub 1310-nm band.Lawv kuj tuaj yeem ua haujlwm hauv 1550-nm band, tab sis nws tsis yog qhov zoo rau thaj av no vim muaj qhov sib txawv siab.Cov fibers optical no feem ntau yog siv nyob rau hauv LAN, MAN thiab nkag mus rau lub network.Cov ntau yam tsis ntev los no (G.652.C thiab G.652.D) muaj qhov txo qis dej siab uas tso cai rau lawv siv rau hauv thaj tsam wavelength ntawm 1310 nm thiab 1550 nm txhawb nqa Coarse Wavelength Division Multiplexed (CWDM) kis.
g:653 ua
G.653 ib hom fiber ntau tau tsim los daws qhov teeb meem ntawm qhov zoo tshaj plaws bandwidth ntawm ib lub wavelength thiab qis tshaj poob ntawm lwm qhov.Nws siv cov qauv ntau dua hauv cov tub ntxhais hauv cheeb tsam thiab thaj chaw me me, thiab lub wavelength ntawm xoom chromatic dispersion tau hloov mus rau 1550 nm kom sib haum nrog qhov poob qis tshaj plaws hauv fiber ntau.Yog li ntawd, G.653 fiber tseem hu ua dispersion-shifted fiber (DSF).G.653 muaj qhov txo qhov loj me, uas yog optimized rau ntev-haul ib hom kis tau tus mob siv erbium-doped fiber amplifiers (EDFA).Txawm li cas los xij, nws lub zog siab concentration hauv cov tub ntxhais fiber ntau tuaj yeem tsim cov teebmeem nonlinear.Ib qho teeb meem tshaj plaws, plaub-yoj sib xyaw (FWM), tshwm sim hauv Dense Wavelength Division Multiplexed (CWDM) system nrog xoom chromatic dispersion, ua rau tsis tuaj yeem lees txais crosstalk thiab cuam tshuam ntawm cov channel.
g:654 ua
G.654 specifications muaj cai "tus yam ntxwv ntawm ib tug txiav-tawm hloov ib hom optical fiber thiab cable."Nws siv cov tub ntxhais loj loj uas ua los ntawm cov silica ntshiab kom ua tiav qhov kev ua haujlwm ntev ntev nrog kev txo qis hauv 1550-nm band.Nws feem ntau kuj muaj siab chromatic dispersion ntawm 1550 nm, tab sis tsis yog tsim los ua haujlwm ntawm 1310 nm txhua.G.654 fiber ntau tuaj yeem tswj tau lub zog siab dua ntawm 1500 nm thiab 1600 nm, uas yog tsim los rau kev siv ntev ntev hauv qab dej hiav txwv.
g.655 ua
G.655 yog lub npe hu ua non-zero dispersion-shifted fiber (NZDSF).Nws muaj qhov me me, tswj cov chromatic dispersion nyob rau hauv C-band (1530-1560 nm), qhov twg amplifiers ua hauj lwm zoo tshaj plaws, thiab muaj ib tug loj cheeb tsam ntawm G.653 fiber.NZDSF fiber ntau kov yeej cov teeb meem cuam tshuam nrog plaub-yoj sib xyaw thiab lwm yam tsis muaj kev cuam tshuam los ntawm kev txav zero-dispersion wavelength sab nraum 1550-nm lub qhov rais ua haujlwm.Muaj ob hom NZDSF, hu ua (-D)NZDSF thiab (+D)NZDSF.Lawv muaj feem cuam tshuam qhov tsis zoo thiab qhov zoo nqes piv rau wavelength.Daim duab hauv qab no qhia txog cov khoom tawg ntawm plaub lub ntsiab hom fiber ntau hom.Qhov sib chromatic dispersion ntawm G.652 raws fiber ntau yog 17ps/nm/km.G.655 fibers feem ntau yog siv los txhawb lub tshuab ntev ntev uas siv DWDM kis tau tus mob.
g:656 ua
Raws li cov fibers uas ua haujlwm zoo thoob plaws ntau lub wavelengths, qee qhov yog tsim los ua haujlwm zoo tshaj plaws ntawm cov wavelengths.Qhov no yog G.656, uas tseem hu ua Medium Dispersion Fiber (MDF).Nws yog tsim los rau kev nkag mus hauv zos thiab ntev ntev fiber ntau uas ua tau zoo ntawm 1460 nm thiab 1625 nm.Hom fiber ntau no tau tsim los txhawb nqa lub tshuab ntev ntev uas siv CWDM thiab DWDM kis tau tus mob tshaj qhov teev wavelength ntau.Thiab tib lub sijhawm, nws tso cai rau kev xa tawm yooj yim ntawm CWDM hauv nroog loj, thiab ua kom muaj peev xwm ntawm fiber ntau hauv DWDM systems.
g:657 ua
G.657 optical fibers yog npaj kom sib haum nrog G.652 optical fibers tab sis muaj qhov sib txawv khoov rhiab heev ua haujlwm.Nws yog tsim los tso cai rau cov fibers khoov, tsis cuam tshuam kev ua haujlwm.Qhov no yog ua tiav los ntawm kev kho qhov muag trench uas qhia txog lub teeb tsis pom kev rov qab mus rau hauv lub hauv paus, tsis yog nws poob rau hauv cladding, ua kom muaj kev khoov ntau dua ntawm cov fiber ntau.Raws li peb txhua tus paub, nyob rau hauv cable TV thiab FTTH kev lag luam, nws yog ib qho nyuaj rau tswj khoov vojvoog nyob rau hauv lub tshav pob.G.657 yog tus qauv tshiab tshaj plaws rau FTTH daim ntaub ntawv, thiab, nrog rau G.652 yog feem ntau siv nyob rau hauv lub xeem poob fiber ntau tes hauj lwm.
Los ntawm cov nqe lus saum toj no, peb paub tias sib txawv ntawm ib hom fiber ntau muaj ntau daim ntawv thov.Txij li thaum G.657 tau sib xws nrog G.652, qee qhov kev npaj thiab cov neeg tsim khoom feem ntau yuav tuaj hla lawv.Qhov tseeb, G657 muaj lub vojvoog khoov loj dua G.652, uas yog tshwj xeeb tshaj yog haum rau FTTH daim ntaub ntawv.Thiab vim muaj teeb meem ntawm G.643 tau siv nyob rau hauv WDM system, tam sim no tsis tshua muaj siv, raug hloov los ntawm G.655.G.654 feem ntau yog siv hauv subsea daim ntawv thov.Raws li nqe vaj lug kub no, kuv vam tias koj yuav muaj kev nkag siab meej txog cov hom fibers no, uas yuav pab tau koj txiav txim siab.
Post lub sij hawm: Sep-03-2021