Synopsis
Kev sib kis ib txhij ntawm ob lossis ntau dua qhov kho qhov muag wavelength teeb liab los ntawm cov kab sib txawv ntawm qhov sib txawv hauv tib lub fiber ntau yog hu uaOptical wavelength division multiplexing (WDM) technology.
Rov siv hom
Optical WDM suav nrog ntau zaus faib multiplexing thiab WDM
Optical zaus division multiplexing (FDM) technology thiab optical wavelength division multiplexing (WDM) technology tsis muaj qhov txawv txav, vim lub teeb yoj yog ib feem ntawm electromagnetic yoj. Qhov zaus ntawm lub teeb thiab wavelength muaj ib qho kev sib raug zoo. Feem ntau, optical zaus division multiplexing yog ib qho subdivision ntawm optical frequencies. Optical channels yog tuab heev. Wavelength division multiplexing (WDM) yog hais txog qhov sib faib ntxhib ntawm optical zaus, cov kev kho qhov muag sib nrug deb, thiab txawm nyob hauv qhov sib txawv ntawm fiber ntau.
Qauv
Wavelength division multiplexer thiab demultiplexer (tseem hu ua ua ke nthwv dej / splitter) tau muab tso rau ntawm ob qhov kawg ntawm cov khoom siv kho qhov muag kom paub txog kev sib txuas thiab kev sib cais ntawm lub teeb sib txawv. Lub hauv paus ntsiab lus ntawm ob lub cuab yeej yog tib yam.
WDM
Lub ntsiab hom ntawm optical wavelength division multiplexers yog fused rub-cone hom, nruab nrab zaj duab xis hom, grating hom thiab hom hom phiaj
Performance indicators, As
Lub ntsiab yam ntxwv indexes yog insertion poob thiab cais degree
Vim yog kev sivWDM cov khoom sivnyob rau hauv kev sib txuas kho qhov muag, qhov nce ntawm qhov muag qhov txuas tsis yog hu ua WDM insertion poob. Thaum lub wavelength 1, 2 kis tau los ntawm tib lub fiber ntau, qhov sib txawv ntawm lub zog ntawm cov tswv yim 2 nyob rau hauv lub splitter thiab lub zog sib xyaw rau hauv cov zis fiber ntau ntawm 1 yog hu ua degree ntawm kev sib cais.
Yam ntxwv & Qhov zoo ntawm optical wavelength division multiplexer
Ua kom tag nrho kev siv qis-tsawg band ntawm optical fiber ntau, ua rau kom muaj peev xwm kis tau tus mob ntawm optical fiber, kom lub cev tsis pub cov ntaub ntawv kis tau los ntawm ib qho khoom siv fiber ntau tuaj yeem ua rau ob peb zaug. Tam sim no, peb tsuas yog siv ib feem me me ntawm cov khoom siv kho qhov muag uas tsis tshua muaj spectrum (1310nm-1550nm). WDM tuaj yeem siv tag nrho ntawm cov bandwidth loj ntawm ib hom kev kho qhov muag fiber ntau, txog 25THz, nrog kev xa tawm bandwidth txaus.
Nws muaj peev xwm xa ob lossis ntau dua asynchronous signals nyob rau hauv tib lub optical fiber, uas yog conducive mus rau lub compatibility ntawm cov teeb liab thiab analog teeb liab, ywj siab ntawm cov ntaub ntawv tus nqi thiab modulation hom, thiab yuav muab tshem tawm los yog ntxiv rau lub channel flexibly nyob rau hauv. nruab nrab ntawm txoj kab.
Rau kev tsim kho qhov muag fiber ntau, tshwj xeeb tshaj yog thaum ntxov nteg cov tub ntxhais ntawm fiber ntau optic cable, tsuav yog cov thawj lub cev muaj zog tso cai, tuaj yeem ua kom muaj peev xwm ntxiv, kom ua tiav cov teeb liab ib-txoj kev lossis ob-txoj kev teeb liab kis tsis tau. loj hloov mus rau qhov qub system, muaj zog yoog raws.
Vim tias qhov txo qis hauv kev siv cov fiber ntau kho qhov muag, txo qis kev tsim kho tus nqi, vim qhov tsawg ntawm cov khoom siv kho qhov muag fiber ntau, thaum tsis ua hauj lwm, nws kuj yog ceev thiab yooj yim rau rov qab.
Kev sib koom ntawm cov khoom siv kho qhov muag ua rau txo tus nqi xa tawm ntau lub cim lossis ntxiv cov kev pabcuam tshiab. Cov cuab yeej siv hauv lub cev tau txo qis heev, yog li txhim kho kev ntseeg siab ntawm qhov system.
Status quote
Vim tias qhov kev xav tau siab ntawm optical WDM rau optical transmitter, optical receiver thiab lwm yam khoom siv, kev siv tau yog qhov nyuaj rau qee qhov, thiab daim ntawv thov ntawm fiber ntau fiber ntau optic cable tsis tshwm sim tshwj xeeb tshaj yog tsis tshua muaj rau cov tsoos broadcasting thiab TELEVISION kis tau tus mob kev pab cuam. , yog li cov tswv yimkev siv WDMtseem tsis tau ntau. Txawm li cas los xij, nrog kev txhim kho ntawm cov kev pabcuam cable TV, kev xav tau ntau ntxiv rau kev siv network bandwidth, kev siv txhua yam kev pabcuam xaiv, kev hloov kho kev lag luam network, thiab lwm yam, cov yam ntxwv thiab qhov zoo ntawm WDM maj mam tshwm sim hauv CATV kis kab mob, qhia qhov dav daim ntawv thov kev cia siab, thiab txawm yuav cuam tshuam rau txoj kev loj hlob ntawm CATV network qauv.
