Vim tias qhov kev txhim kho tau ceev nrawm ntawm cov ntaub ntawv pabcuam, cov kev sib nrawm ntawm lub network sib txuas tau nrawm dua, MAN tau dhau los ua ib qho kev tsom mus rau kev tsim kho network, kev lag luam kev sib tw ua rau cov neeg ua lag luam sib txuas tau zoo dua rau tus nqi network. Ua raws li qhov xav tau ntawm kev ua lag luam, cov nqi qis CWDM txiv neej cov khoom lag luam tshwm sim rau lub sijhawm no.
Nrog tag nrho spectrum CWDM pab pawg (FCA) txhawb nqa kev txhawb nqa CWDM Technology thiab ITU-T rau kev ua qauv ntawm CWDM, nws ua rau CWDM cov cuab yeej siv thev naus laus zis tuam txhab tsim khoom thiab cov neeg khiav dej num yog qhov tseem ceeb. ITU-T 15th pab pawg los ntawm CWDM wavelength daim phiaj ntawm G.694.2, thiab dhau los ua qhov tseem ceeb hauv keeb kwm ntawm kev txhim kho CWDM thev naus laus zis. Pab neeg thib 15 kuj tso cov ntsiab lus ntawm CWDM system interface txoj cai app cua ntsawj ntshab qauv. Shanghai tswb thiab lwm cov tuam txhab nyob hauv Suav teb hauv kev lag luam tus qauv ntawm CWDM thev naus laus zis kuj tau ua qee yam kev koom tes, cov qauv hauv tsev tseem ceeb tseem tab tom sib tham.
Raws li kev loj hlob ntawm cov kev xav tau ntawm kev ua lag luam thiab kev tsim qauv ntawm CWDM thev naus laus zis sai, ntau cov khoom siv kev sib txuas lus xws li Nortel, Ciena, Huawei, alcatel Shanghai tswb (asb), hluav taws network tsim cov khoom muaj feem xyuam thiab tau txais ntau yam kev siv hauv kev ua lag luam Cov.
CWDM system yog tus nqi qis WDM kis tshuab mus rau txiv neej nkag txheej. Lub hauv paus ntsiab lus, CWDM siv kev siv hluav taws xob ntau ntxiv rau lub teeb taws sib txawv ntawm lub teeb ci kom rov siv lub teeb liab rau ib qho kev xa xov fiber ntau, ntawm qhov txuas ntawm qhov tau txais kawg, nrog kev pab los ntawm photolysis ntawm multiplex fiber ntau cov teeb liab tau decomposed rau hauv cov teeb liab sib txawv, txuas nrog tus coj tau khoom. Thiab qhov sib txawv tseem ceeb nrog DWDM yog tias: piv nrog 0.2nm rau 1.2 nm wavelength spacing hauv DWDM system, CWDM Wavelength Spacing yog dav dua, wavelength spacing ntawm 20 nm kev lag luam txais qauv. Txhua lub viav vias ntawm band npog ntawm tib hom kab ke fiber ntau ntawm O, E, S, C, L band thiab lwm yam.
Vim tias CWDM cov kab ke muaj kev dav yoj thiab qhov nruab nrab tsis txaus rau cov kev ntsuas ntawm laser. Txij li lub wavelength spacing mus txog 20 nm, lub kaw lus siab ntev wavelength hloov tuaj yeem ncav cuag -6.5 + ~ + 6.5 ℃, emission wavelength ntawm laser precision tuaj yeem nce txog +/- 3nm, thiab kev ua haujlwm kub ntau (-5 ℃ ~ 70 ℃ ), lub ntsej muag yoj los ntawm kev hloov qhov kub thiab txias tseem nyob hauv qhov kev tso cai ntau, laser tsis muaj kev tswj xyuas qhov kub thiab txias, yog li cov qauv ntawm cov qauv laser tau yooj yim, ua kom muaj kev txhim kho zoo dua.
Ntxiv rau, qhov loj tshaj qhov ntev yoj txhais tau tias rov qab ntaus ntawv / kev daws teeb meem ntawm cov qauv multiplexer yooj yim zog. CWDM system, piv txwv li, CWDM Lim txheej txheej txheej yuav txo tau mus rau 50, thiab DWDM system ntawm 100 GHZ lim zaj duab xis txheej txheej naj npawb yog txog 150, uas ua rau muaj txiaj ntsig zoo, txo tus nqi, thiab cov neeg lim dej tau muaj kev sib tw ntau heev. CWDM lim nqi qis dua tus nqi DWDM lim txog ntau tshaj 50%, thiab nrog kev nce tshuab automation ntau lawm, nws yuav txo tau ntxiv.
Tseem CWDM qhov kev xa xov luv luv nyob hauv nroog qhov chaw nyob hauv nroog (tsis pub dhau 80 km), thiab tus nqi channel feem ntau tsis tshaj 2.5 Gbps, yog li tsis tas yuav muaj lub teeb ua kom pom dav, tawg, tsis suav thiab lwm yam kev txiav txim siab hauv cov kis kab, ces koj tuaj yeem ua rau txoj kev yooj yim.
Los ntawm qee qhov ntawm cov no, los ntawm kev nthuav dav yoj yoj yov sib txawv thiab cov khoom siv yooj yim, tus nqi ntawm cov channel kho qhov muag tau ua CWDM system unit tuaj yeem txo mus rau 1/2 lossis txawm tias 1/5 ntawm DWDM system, nws muaj qhov muaj zog zoo nyob hauv nroog loj. network nkag txheej.
FOCC yog lub khw muag khoom zoo tshaj ntawm kev muab cov khoom lag luam zoo tshaj lij, yog tias koj xav paub ntau cov ntaub ntawv muaj cov khoom lag luam, txais tos hu rau peb.
