Dense Wavelength Division Multiplexing (DWDM) yog lub peev xwm los muab cov txheej txheem kho qhov muag rau kev sib kis ntawm ib qho fiber ntau. DWDM thev naus laus zis yog qhov txuas ntxiv ntawm kev sib txuas kho qhov muag thiab qhov txiaj ntsig tseem ceeb ntawm DWDM yog tias nws yog raws tu qauv thiab kev sib kis tus nqi ywj pheej, tso cai rau DWDM-based networks xa cov ntaub ntawv hla IP, ATM, SONET, SDH thiab Ethernet.
DWDM systems feem ntau muaj cov khoom siv kho qhov muag hauv qab no:DWDMOptical modules, DWDM MUX/DEMUX, DWDM OADM thiab optical amplifiers.
DWDM Optical Modules
Raws li chav kawm ntawm kho qhov muag module, DWDM optical module yog ib qho tseem ceeb rau kev hloov pauv ntawm cov teeb liab photoelectric, ib yam li cov khoom siv kho qhov muag zoo tib yam, DWMD optical module xav tau DWDM wavelength division multiplexer los koom tes nrog daim ntawv thov, cov sib txuas wavelength band los ntawm kev sib xyaw yoj sib cais hauv ib qho. core los yog ib khub ntawm optical fiber kom ua tiav qhov muaj peev xwm loj hauv kev sib txuas lus mus ntev. Txhua DWDM optical module muaj nws tus kheej lub wavelength tshwj xeeb, siv DWDM thev naus laus zis, tuaj yeem txuag tau fiber ntau cov peev txheej, thaum cov khoom siv kho qhov muag zoo tib yam tsis tuaj yeem. Feem ntau ntawm DWDM optical modules ntawm kev ua lag luam niaj hnub no ua haujlwm ntawm 100 GHz thiab 50 GHz (DWDM SFP, DWDM SFP ntxiv, DWDM XFP, thiab lwm yam).
DWDM MUX/DEMUX
Lub DWDM multiplexer (Mux) muab cov khoom tso tawm qhov muag pom los ntawm ntau lub transmitters rau kev sib kis ntawm ib qho fiber ntau. Thaum qhov kawg tau txais, lwm DWDM demultiplexer (Demux) cais cov teeb liab sib xyaw ua ke. tsuas yog ib qho fiber ntau yog siv los ntawm DWDM multiplexers (hauv txhua qhov kev taw qhia kis tau tus mob). es tsis txhob siv ib qho fiber ntau hauv txhua khub ntawm optical modules, DWDM tso cai rau ntau qhov chaw kho qhov muag los tuav ib qho kev kho qhov muag cable.
AW
AAWG yog ib hom DWDM multiplexer. Thawj cov khoom lag luam muaj DWDM multiplexers hauv fiber optic kev sib txuas lus muaj ntau yam peb-chaw nres nkoj dielectric zaj duab xis lim (TFF) nyob rau hauv series, tab sis thaum tus naj npawb ntawm cov channel ntau dua 16, DWDM modules raws li TFF technology tau dhau los ua kom tau raws li daim ntawv thov. kev xav tau. Ib tug raug DWDM system, txawm li cas los xij, feem ntau nqa ntau tshaj 40 lossis 48 wavelengths hauv ib lub fiber ntau thiab yog li yuav tsum muaj ntau qhov chaw nres nkoj rau multiplexing / demultiplexing. WDM modules nyob rau hauv series configurations sau ntau dhau lub zog poob ntawm cov chaw nres nkoj tom qab, yog li cov kev teeb tsa sib npaug yuav tsum tau ua kom ntau ntau / demultiplex kaum ob ntawm wavelengths ib zaug. Ib qho khoom siv kho qhov muag yog Arrayed Waveguide Grating AWG, lub thermal-free AWG uas siv yoj combining thiab splitting zog rau ntau tshaj 16 raws.
DWDM OADM
Nyob rau hauv ib co optical network kis tau tus mob pob qij txha, nws yog feem ntau yuav tsum tau cais ib co teeb liab kwj ntawm lub kis tau tus mob los yog mus ntxig ib co teeb liab ntws mus rau hauv lub system, piv txwv li "splitting". Daim duab hauv qab no qhia txog 1-channelDWDM OADMtsim los cais lossis ntxig cov teeb liab kho qhov muag ntawm ib qho wavelength tshwj xeeb. Los ntawm sab laug mus rau sab xis, cov khoom siv hluav taws xob sib txuas tau muab faib ua ob yam: hla dhau thiab sib cais, nrog OADM cais tsuas yog cov teeb liab xiav qhov muag pom. Cov kab hluav taws xob sib cais tau xa mus rau tus txais ntawm tus neeg siv khoom. Tus so ntawm cov teeb liab kho qhov muag dhau los ntawm OADM yog multiplexed nrog cov teeb liab tso tawm tshiab. OADM ntxiv cov teeb liab xiav kho qhov muag tshiab, uas yog ua ke nrog cov teeb liab hla dhau los ua cov teeb liab sib xyaw tshiab.
DWDM EDFA
EDFA optical amplifier yog ib qho khoom siv kho qhov muag uas siv erbium ions ua qhov nruab nrab nce. Optical amplifiers amplify optical signals hla ntau yam ntawm wavelengths, uas yog ib qho tseem ceeb rau DWDM system applications. Hauv qhov sib piv rau EDFAs siv hauv CATV lossis SDH systems, EDFAs siv hauv DWDM systems qee zaum hu ua DWDM EDFAs. Txhawm rau txuas ntxiv qhov kev ncua deb ntawm DWDM systems, ib tus tuaj yeem xaiv los ntawm ntau hom optical amplifiers, suav nrog DWDM EDFAs, CATV EDFAs, SDH EDFAs, EYDFAs thiab Raman amplifiers.
DWDM optical thauj network daws teeb meem
Ib qho kev daws teeb meem DWDM tiav yog qhia hauv daim duab.
1. DWDM optical modules ntawm qhov sib txawv wavelengths los hloov cov teeb liab hluav taws xob rau hauv cov teeb liab kho qhov muag rau kev sib kis ntawmDWDM MUXmultiplexed rau hauv ib lub fiber ntau.
2. post-amplifiers kom muaj zog ntawm cov teeb liab kho qhov muag tom qab nws tawm ntawm DWDM MUX.
3. kev siv DWDM OADMs ntawm cov chaw nyob deb nroog kom cais thiab ntxig cov teeb liab kho qhov muag ntawm cov wavelengths tshwj xeeb.
4. kev siv lub relay amplifier hla qhov ntev ntawm fiber ntau, raws li qhov xav tau.
5. lub preamplifier amplifies lub teeb liab optical ua ntej nws nkag mus rau DWDM DEMUX.
6. lub input optical teeb liab tawg los ntawm DWDM DEMUX rau hauv ib tus neeg DWDM wavelengths
7. tus kheej DWDM optical modules hloov cov teeb liab kho qhov muag rau hauv lub teeb liab hluav taws xob rau kev xa mus rau cov neeg siv khoom.
Kev siv cov tshuab DWDM tuaj yeem muab cov bandwidth rau cov ntaub ntawv loj, thiab raws li cov thev naus laus zis hloov zuj zus mus, lub peev xwm ntawm DWDM tshuab tau loj hlob, tso cai rau qhov sib nrug luv dua thiab yog li ntawd ntau dua wavelengths. Txawm li cas los xij, DWDM tseem tab tom txav mus dhau qhov kev sib kis tau los ua lub hauv paus rau txhua qhov kev sib txuas lus kho qhov muag nrog lub wavelength muab thiab kev tiv thaiv mesh. Raws li cov thev naus laus zis hloov zuj zus, DWDM cov tshuab yuav xav tau cov khoom siv qib siab ntxiv kom muaj peev xwm xa tau cov txiaj ntsig zoo dua.
