Los ntawm lig 1980s, fiber-optic kev sib txuas lus maj mam hloov los ntawm luv- wavelength mus rau ntev-wavelength, los ntawm multimode fiber mus rau ib hom fiber ntau.Tam sim no, ib hom fiber ntau yog siv dav hauv lub teb chaws cable lub cev network thiab lub xeev lub cev kab network.Multimode fiber ntau tsuas yog txwv rau qee qhov LANs uas tsis tshua muaj ceev.Tam sim no, cov fiber ntau uas tib neeg tham txog yog hais txog ib hom fiber ntau.Ib hom fiber ntau muaj qhov zoo ntawm kev poob qis, bandwidth loj, hloov kho yooj yim thiab nthuav dav, thiab tus nqi qis, thiab siv dav.
Raws li tib neeg txoj kev xav tau txhim kho ntxiv, Internet tau dhau los ua ib feem tseem ceeb ntawm lub neej.Yuav kom ua raws li kev txhim kho ntawm cov ntaub ntawv hnub nyoog, kev sib txuas cov cuab yeej siv hluav taws xob thiab cov khoom lag luam tau hloov kho tas li, tshwj xeeb tshaj yog cov kev tshawb fawb loj thiab kev loj hlob ntawm fiber ntau cables. .Muaj ntau ntau hom fiber ntau optic cables ntawm ntau hom thiab siv nyob rau hauv kev ua lag luam.Yuav ua li cas xaiv lub tswv yim hom nyob rau hauv lub ntsej muag ntawm ntau optical fibers?Yuav ua li cas xaiv cov khoom zoo fiber ntau optic?
Main pawg ntawm optical fiber
Raws li kev faib tawm hom kis tau tus mob, optical fiber ntau muaj ob hom multimode fiber ntau thiab ib hom fiber ntau.Multimode fiber ntau tuaj yeem kis tau ntau hom, thaum ib hom fiber ntau tuaj yeem kis tau ib hom rau kev ua haujlwm wavelength.Feem ntau siv multimode fibers yog 50/125m thiab 62.5/125m.Cov tub ntxhais txoj kab uas hla ntawm ib hom fiber ntau yog feem ntau 9/125 m.Multimode fiber ntau-cov tub ntxhais yog tuab (50 lossis 62.5m).Txij li cov geometry ntawm cov fiber ntau (feem ntau yog cov tub ntxhais txoj kab uas hla d1) loj dua lub wavelength ntawm lub teeb (li 1 micron), muaj ntau ntau los yog ntau pua fibers.Propagation hom.Tam sim no, vim hais tias ntawm dispersion loj ntawm hom, kis tau tus mob zaus yog txwv, thiab qhov nce nrog kev ncua deb yog loj dua.Raws li cov yam ntxwv saum toj no, multimode optical fibers feem ntau yog siv nyob rau hauv tes hauj lwm nrog kuj tsis tshua muaj nqi kis tau tus mob. thiab kis tau tus mob luv luv, xws li hauv cheeb tsam network.Cov tes hauj lwm zoo li no feem ntau muaj ntau cov nodes, ntau pob qij txha, ntau khoov, thiab connectors thiab couplers.Tus naj npawb ntawm cov khoom siv, tus naj npawb ntawm cov khoom siv nquag siv rau ib chav tsev fiber ntau ntev, thiab lwm yam, kev siv ntau hom fiber ntau tuaj yeem txo cov nqi network.
Ib hom fiber ntau muaj cov tub ntxhais me me (feem ntau txog 9 m) thiab tsuas yog kis tau ib hom ntawm lub teeb xwb. Yog li ntawd, qhov sib txawv ntawm cov qauv yog me me, haum rau kev sib txuas lus nyob rau hauv tej thaj chaw deb, tab sis tseem muaj cov khoom dispersion thiab waveguide dispersion, yog li ntawd. Ib hom fiber ntau muaj qhov xav tau ntau dua rau qhov dav dav thiab kev ruaj ntseg ntawm lub teeb ci, uas yog, qhov dav spectral yuav tsum nqaim, thiab kev ruaj ntseg yuav tsum zoo.Single-hom fiber ntau feem ntau yog siv rau hauv cov kab nrog kev sib kis ntev thiab kuj. Kev sib kis tau zoo, xws li kev sib kis mus ntev, kev tsim kho hauv cheeb tsam hauv nroog, thiab lwm yam. Tam sim no FTTx thiab HFC tes hauj lwm feem ntau yog ib hom fiber ntau.
Qhov sib txawv ntawm ib hom fiber ntau transceivers thiab multimode fiber transceivers
Fiber optic transceiver yog Ethernet kis tau tus mob nruab nrab hloov khoom siv uas sib pauv hluav taws xob thiab kho qhov muag teeb liab ntawm Ethernet, thiab cov fibers optical uas xa cov ntaub ntawv hauv lub network tau muab faib ua ntau hom fibers thiab ib hom fibers.Los ntawm daim ntawv thov kev sib txuas, vim tias fiber ntau tsis tuaj yeem ua tau. kis tau mus ntev, nws tsuas yog siv tau rau kev sib txuas hauv tsev thiab nruab nrab ntawm cov tsev.Txawm li cas los xij, vim hais tias multimode fiber ntau thiab sib txuas fiber ntau transceiver kuj pheej yig, nws tseem nyob hauv qee qhov ntau.Got daim ntawv thov.Ntau lub tsev kawm ntawv kuj siv multimode fiber ntau thaum lawv tsim ib lub tsev kawm ntawv hauv tsev kawm ntawv.
Nrog rau kev nce qib ntawm thev naus laus zis, ib hom fiber ntau pib nkag mus rau kev sib txuas mus ntev (los ntawm ob peb mais mus rau ntau tshaj li ib puas kilometers), thiab txoj kev loj hlob sai heev, nyob rau hauv ob peb xyoos, los ntawm high-end kev siv mus rau cov tsev ntawm cov neeg zoo tib yam, Piv txwv li, ntau lub tsev tam sim no siv optical transceivers (hu ua FTTH hom, fiber ntau-rau-lub tsev) thaum lawv qhib lub network.Kev siv optical transceivers tau dhau los ua ntau hom kev pabcuam muaj nqis ntxiv rau kev tshaj tawm thiab TV.
Siv fiber ntau optic transceivers rau kev sib txuas lus, qhov zoo tsis yog ruaj khov, tab sis dab tsi ntxiv?Qhov ntawd yog ceev!100M puv duplex, txawm tias siab dua 100 puv duplex: 1000M puv duplex.
Nws txuas lub network kis tau tus mob ncua deb ntawm 100M mus rau ntau tshaj 100KM rau twisted khub, uas tuaj yeem yooj yim paub txog kev sib txuas ntawm cov neeg rau zaub mov motherboard, repeater, hub, davhlau ya nyob twg thiab lub davhlau ya nyob twg.Thaum xaiv fiber ntau-optic networking, peb yuav ntxiv dag zog rau kev nkag siab ntawm fiber ntau optical, ua kom muaj kev paub zoo, thiab xaiv cov fiber ntau ua tau zoo tshaj plaws los ntawm kev txiav txim siab zoo.