Main feature
WDM technologymuaj ntau yam zoo thiab tab tom txhim kho sai. Cov peev txheej bandwidth ntawm optical fiber ntau tuaj yeem siv los ua kom muaj peev xwm kis tau tus mob ntawm cov khoom siv kho qhov muag ob peb zaug mus rau ntau kaum lub sij hawm piv nrog kev sib kis ib leeg; multi-wavelength multiplexing nyob rau hauv ib hom kev kho qhov muag fiber ntau kis tau tus mob yuav txuag tau ntau ntawm optical fiber thaum lub sij hawm loj-muaj peev xwm kis tau tus mob mus ntev; Cov kab hluav taws xob tau teeb tsa muaj cov cores me me, thiab lub wavelength division multiplexing tuaj yeem siv los nthuav lub peev xwm yam tsis muaj kev hloov pauv loj rau lub hauv paus system; txij li lub wavelengths ntawm cov teeb liab kis tau nyob rau hauv tib lub fiber yog ywj siab ntawm ib leeg, cov teeb liab uas muaj cov yam ntxwv sib txawv kiag li yuav kis tau. Ua kom tiav kev sib koom ua ke thiab kev sib cais ntawm ntau yam kev pabcuam kev sib txuas lus, suav nrog cov teeb liab digital thiab analog teeb liab, nrog rau kev sib koom ua ke thiab kev sib cais ntawm PDH signals thiab SDH signals; lub wavelength division multiplexing channel yog pob tshab rau cov ntaub ntawv hom, uas yog, nws tsis muaj dab tsi ua rau lub teeb liab tus nqi thiab hluav taws xob modulation hom.
A WDM systemtuaj yeem nqa ntau hom "kev pabcuam", xws li ATM, IP, thiab lwm yam .; nyob rau hauv kev nthuav dav thiab kev loj hlob ntawm lub network, nws yog ib qho zoo tshaj plaws txhais tau tias ntawm kev nthuav dav, thiab nws kuj yog qhov kev taw qhia ntawm cov kev pab cuam broadband tshiab (xws li CATV, HDTV thiab B-ISDN, thiab lwm yam.) Qhov zoo tshaj plaws txhais tau tias, ntxiv cov wavelength ntxiv tuaj yeem qhia txog kev lag luam tshiab. los yog muaj peev xwm tshiab koj xav tau; siv WDM thev naus laus zis los ua kom tau txais kev hloov pauv thiab rov qab los ntawm kev sib txuas, uas yuav paub txog lub pob tshab thiab muaj sia nyob tau zoo nyob rau yav tom ntej; Kev xa mus rau hauv lub teb chaws qaum teb network Tib lub sijhawm, daim ntawv thov ntawm EDFA tuaj yeem txo tus naj npawb ntawm SDH repeaters nyob rau hauv lub cev ntev ntawm lub cev, yog li txo cov nqi.
Qhov teeb meem
Kev sib txuas lus kho qhov muag nrog ntxiv / poob multiplexing thiab cross-connect functions raws li WDM thev naus laus zis muaj qhov zoo ntawm kev teeb tsa yooj yim thiab kev ua kom zoo. Nws tau dhau los ua cov kev taw qhia kev loj hlob ntawm high-ceev kis tau tus mob network yav tom ntej. Nws yog qhov zoo los daws cov teeb meem kev lag luam hauv qab no.
WDM yog lub tshuab tshiab, thiab nws cov qauv kev lag luam yog qhov ntxhib heev. Yog li ntawd, kev sib cuam tshuam ntawm WDM cov khoom ntawm cov lag luam sib txawv yog qhov tsis zoo, tshwj xeeb tshaj yog nyob rau sab sauv kev tswj hwm. Nyob rau hauv thiaj li yuav xyuas kom meej lub loj-scale siv ntawmWDM systems hauv lub network, nws yog ib qho tsim nyog los xyuas kom meej qhov sib cuam tshuam ntawmWDM systemsthiab kev sib txuas lus thiab kev sib txuas lus ntawm WDM systems thiab ib txwm siv. Yog li ntawd, kev tshawb fawb ntawm cov khoom siv kho qhov muag interface yuav tsum tau ntxiv dag zog.
Kev tswj hwm network ntawm WDM system, tshwj xeeb tshaj yog WDM kev tswj hwm network nrog txoj kev nce / nqis, tsis paub tab. Kev saws loj loj hauv lub network yuav tsum muaj kev tswj xyuas network zoo ntawm WDM systems. Piv txwv li, nyob rau hauv cov nqe lus ntawm kev ua txhaum cai, txij li thaum WDM system tuaj yeem txhawb ntau hom kev pabcuam teeb liab ntawm qhov kho qhov muag channel, thaum WDM tsis ua haujlwm, qhov kev ua haujlwm yuav tsum tuaj yeem kuaj xyuas lub sijhawm thiab nrhiav qhov ua rau tsis ua haujlwm. ; cov haujlwm tseem ceeb thiab kev saib xyuas software tseem tsis muaj nyob rau tam sim no. laus; Nyob rau hauv cov nqe lus ntawm kev tswj kev ua tau zoo, WDM systems siv analogues rau multiplex thiab amplify optical signals. Yog li ntawd, feem ntau siv me ntsis yuam kev tus nqi tsis haum rau kev ntsuas qhov zoo ntawm WDM cov kev pab cuam. Ib qho kev ntsuas tshiab yuav tsum raug pom kom raug ntsuas lub network muab rau cov neeg siv.
Lub immaturity ntawm ib co tseem ceeb kho qhov muag pab kiag li lawm yuav ncaj qha mus txwv txoj kev loj hlob ntawmoptical kis tau tus mob network, xws li tunable lasers. Feem ntau 4 mus rau 6 lub lasers uas tuaj yeem hloov kho hauv tag nrho cov network tau siv hauv cov tes hauj lwm kho qhov muag, tab sis nws nyuaj rau kev lag luam xws li tunable lasers tam sim no.
