Nrog rau kev txhim kho tas mus li ntawm kev lag luam sib txuas lus optical, cov thev naus laus zis tshiab thiab cov kev daws teeb meem txuag nqi txuas ntxiv mus. Piv txwv li, cov khoom CWDM thiab DWDM tau siv dav dua, yog li hnub no peb yuav kawm txog cov khoom CWDM thiab DWDM!
CWDM yog ib qho thev naus laus zis xa xov WDM pheej yig rau txheej nkag mus rau hauv nroog loj. Txuag cov peev txheej fiber thiab cov nqi network, nws daws tau ob qho teeb meem ntawm kev tsis txaus fiber thiab kev xa ntau yam kev pabcuam pob tshab. Lub network tuaj yeem tsim tau thiab kev lag luam tuaj yeem ua tiav hauv lub sijhawm luv luv.
Cov txiaj ntsig ntawm CWDM:
※ Qhov zoo tshaj plaws ntawm CWDM yog tus nqi qis ntawm cov khoom siv.
※ Nws tuaj yeem txo cov nqi khiav lag luam ntawm lub network.
※ Nws tuaj yeem ua rau muaj peev xwm kis tau ntawm cov fiber ntau optical thiab txhim kho kev siv cov peev txheej fiber ntau optical.
※ Me me thiab siv hluav taws xob tsawg.
※ Muaj kev ywj pheej zoo thiab scalability
DWDM tuaj yeem sib xyaw thiab xa cov wavelengths sib txawv hauv tib lub fiber tib lub sijhawm. Yuav kom ua tau zoo, ib lub fiber raug hloov mus rau ntau lub fiber virtual. DWDM feem ntau muaj ob daim ntawv thov: qhib DWDM thiab kev sib xyaw ua ke DWDM.
Cov txiaj ntsig ntawm DWDM:
※ Nws cov txheej txheem thiab qhov ceev ntawm kev sib kis tsis muaj feem cuam tshuam.
※ Tus multiplexer thiab splitter ntawm lub integrated DWDM system siv cais ntawm lub transmitter thiab receiver
※ Cov khoom siv DWDM sib xyaw ua ke muaj cov qauv yooj yim thiab qhov ntim me dua, tsuas yog li ib feem tsib ntawm qhov chaw uas DWDM qhib nyob, txuag cov peev txheej hauv chav computer
※ Lub kaw lus DWDM uas sib xyaw ua ke tsuas yog siv cov khoom siv passive (xws li multiplexers lossis demultiplexers) ntawm qhov kawg tau txais thiab xa tawm. Cov neeg teb xov tooj tuaj yeem tso cov xaj ncaj qha los ntawm cov chaw tsim khoom siv, txo cov kev sib txuas khoom thiab txo cov nqi, yog li txuag cov nqi khoom siv.
CWDM thiab DWDM yog ob qho tib si wavelength division multiplexers, yog li qhov txawv ntawm lawv yog dab tsi? CWDM (piv txwv li, sparse wavelength division multiplexing) thiab DWDM (piv txwv li, dense wavelength division multiplexing), peb tuaj yeem pom qhov txawv ntawm ob qho no: "dense" thiab "sparse". Sparse Wavelength Division Multiplexing, raws li lub npe qhia, yog ib qho txheeb ze ze ntawm Dense Wavelength Division Multiplexing.
Lawv qhov sib txawv feem ntau pom tseeb hauv peb lub ntsiab lus hauv qab no:
1) CWDM tus neeg nqa khoom channel spacing yog qhov dav heev, yog li ntawd, tsuas yog 5 txog 6 wavelengths ntawm lub teeb nthwv dej tuaj yeem ua multiplexed ntawm tib lub fiber optical, thiab qhov sib txawv ntawm "sparse" thiab "dense" lub npe los ntawm qhov no;
2) CWDM modulated laser siv uncooled laser, thaum DWDM siv cooled laser. Lub txias laser siv temperature tuning, thiab lub uncooled laser siv electronic tuning. CWDM tam sim no nrov heev ntawm cov neeg muab kev pabcuam enterprise. Hais yooj yim: DWDM yog ib feem ntawm CWDM.
3) Ib puag ncig siv cov khoom siv txawv. CWDM feem ntau yog siv rau hauv txheej sib sau ua ke thiab txheej nkag mus; DWDM siv rau hauv ib puag ncig kev sib txuas lus tsheb ciav hlau.
Lub sijhawm tshaj tawm: Lub Xya Hli-03-2021