Pab Pawg Network-WDM-PON cov kev pab cuam network
Tam sim no, lub ntsiab siv EPON kho qhov muag siv network, lossis GPON, ob qho tib si nce thiab nqis hauv ib qho kev faib hluav taws xob ib ntu los ntawm txhua tus neeg siv rau cov ntaub ntawv sib kis. Qhov kev siv tshuab no rau ib qho yoj yoj ib zaug rau txhua tus neeg siv yog muab lub sijhawm sib tshooj, ob qho tib si txwv cov kev siv bandwidth rau ib tus neeg siv, tab sis kuj muaj ntau cov pov tseg fiber ntau nws tus kheej muaj bandwidth. WDM PON thev naus laus zis tau nkag mus rau hauv qhov system, tias WDM-PON, cov neeg siv nkag tau mus rau bandwidth tau nce ntau txawm tias ob peb zaug kom tau raws li qhov kev xav tau kawg ntawm cov neeg siv, WDM-PON yog li tseem suav tias yog kev tsim kho txuas ntxiv rau hauv lub network.
Cov kev daws teeb meem
Hauv WDM-PON system, ntau qhov sib txawv ntawm cov wavelengths ib txhij, thiab yog li cov kev daws teeb meem tshaj plaws yog WDM-PON OLT nyob rau hauv ntau qhov sib txawv ntawm cov wavelengths sib txawv ntawm cov khoom siv hluav taws xob, txhua ONU siv qhov tshwj xeeb wavelength ntawm lub teeb ci kuj yog, raws li ntau yam pre-tsim kev sib txuas taw tes Lub teeb tsa thiab kev khiav hauj lwm wavelength. Yog tias muaj pes tsawg tus wavelengths, cov khoom siv hluav taws xob ntau ntxiv xav tau cov teeb meem loj dua cia, uas yog qhov tshwj xeeb ONU. Vim muaj teeb meem loj cia ONU, lub teeb tsa teeb meem siv nyob rau hauv kev daws teeb meem yog qhov nyuaj WDM-PON system, kev siv tsis muaj xim tsis muaj ONU tau dhau los ua kev pom zoo ntawm kev tshawb fawb tam sim no hauv WDM-PON raws kev daws teeb meem yog xim tsis muaj xim WDM-PON ONU Mainstream system. Cov xim tsis muaj kev siv ONU cov tswv yim siv raws li kev siv cov khoom sib txawv tuaj yeem muab faib ua cov lasable tunable, cov kab teeb pom kev sab nrauv thiab cov hom tsis yog.
Daim duab 1 ONU siv nyob rau hauv qhov ntau ntawm cov teeb ci WDM - PON System
Tunable laser siv lub wavelength tunable laser kom ONU tuaj yeem ua haujlwm nrog cov yoj hluav taws xob sib txawv, tunable lasers tseem ua haujlwm ntawm qhov yoj yoj, tab sis tus yoj yoj yob tuaj yeem hloov kho, xws li hluav taws xob qhov sib txawv, lub suab thiab lub tshuab hluav taws xob qhov ntsuas kub los ntawm kev pabcuam txhais tau tias, Tib qho system yuav siv tau los tsim cov tshuab laser sib txawv yoj lub cev. Txawm li cas los xij, cov laser tunable laser siv dua li cov PON system ua cov khoom siv ntau dua, tus nqi kuj tseem siab dua, thiab yog li ntawd tam sim no WDM-PON system feem ntau tsis siv.
Qhov thib ob daws tau muab tso rau hauv qhov pom dav ntawm ONU lub teeb, lub teeb los ntawm ONU tawm, tom qab los ntawm WDM cov teeb meem khoom, xws li nyias zaj duab xis lim lossis AWG, faib cov teeb liab spectrum, cia tsuas yog qee lub wavelengths thiab kis tau ib feem ntawm Nyob hauv lub hauv paus chaw ua hauj lwm rau OLT. Yog li txhua ONU nrog tib lub teeb pom kev, tab sis vim tias lawv tau txuas nrog qhov sib txawv ntawm chaw nres nkoj ntawm WDM multiplexer, yog li tsim cov teeb liab cais rau txhua qhov wavelength channel. ONU siv nyob rau hauv qhov ntau ntawm cov teeb ci WDM-PON cov qauv qhia hauv daim duab 1. Broad spectrum teeb pom kev zoo tuaj yeem SLED, ASE-EDFA thiab ASE-RSOA nyiam. Qhov dav ntawm lub teeb ci nyob rau hauv WDM-PON system, lub teeb tawm los ntawm lub teeb pom kev, tsuas yog ib feem me nqaim ntawm cov spectrum yog siv los ua cov teeb meem thauj khoom uplink, thiab lwm qhov loj npaum li cas ntawm lub zog yog lub sijhawm, thiab yog li ntawd yuav tsum muaj hom teeb ci los muab lub teeb pom kev zoo txaus. Ntxiv rau, cov spectrum split yuav ua rau muaj qhov loj dua linear crosstalk txwv qhov ntau qhov kev hloov pauv ntawm lub system, koj yuav tsum xaiv qhov tsim nyog multiplexer thiab demultiplexer dav pass band spectrum thiab channel spacing.
Lwm qhov kev daws teeb meem tsis muaj lub teeb ci rau hauv ONU, lub kaw lus ntawm txhua lub teeb ci tau muab tso rau ntawm OLT, dhau ntawm AWG thiab muab tom qab tshwj xeeb wavelength spectrum ntawm lub teeb liab kho qhov muag rau ONU tau muab faib, thiab qhov no ONU ncaj qha modulates lub kho qhov muag teeb liab, los tsim cov paib uplink, raws li qhia hauv daim duab 2. Raws li txoj hauv kev ntawm cov kwj deg hluav taws xob teeb liab, raws li cov kev pab cuam no tseem hu ua kev nthuav dav ntawm kev siv tsis muaj xim ONU. Hauv qhov kev siv no, qhov dav spectrum teeb tawm los ntawm lub teeb ci tau muab faib AWG sib txawv ONU ua cov khoom siv hluav taws xob nyob sab, yog li tsis muaj qhov pov tseg ntawm lub teeb liab kho qhov muag. Broad spectrum lub teeb muaj peev xwm tseem tuaj yeem xaiv qhov tshwj xeeb uas tau hloov mus ntawm SLED, EDFA thiab RSOA lwm qhov hu ua cov noob noob. Ua raws li cov khoom siv tau siv hauv kev xav, muaj ntau yam kev daws teeb meem ntawm kev siv tshuab. Tsis muaj lub teeb ntsuas hluav taws xob siv hauv ONU, xav kom pheej yig, tuaj yeem ua haujlwm nyob rau hauv qhov ntsuas kub tag nrho, los ntawm cov teebmeem polarization ntawm qhov kho qhov muag loj, tsis pom zoo poob, suab nrov. Feem ntau siv cov kev hloov kho suav nrog kev txhaj tshuaj tiv thaiv FP-LD, RSOA thiab EAM, M-ZSOA zoo li, lawv yuav tau ua haujlwm ntau spectral yog dav, piv txwv li, cov ntaus ntawv ua haujlwm tau zoo thiab muaj kev ywj pheej ntawm lub wavelength ntawm lub teeb liab kho qhov muag, uas tuaj yeem siv rau hauv tag nrho ONU tib qho cuab yeej, paub qhov tseeb tsis muaj xim tsis zoo ONU.
Txhawb nqa ua kom muaj ntau yam sib cais
WDM-PON PON tuaj yeem suav tias yog daim ntawv kawg, tab sis nws tseem nyuaj rau yav tom ntej kev thov loj-teev, feem ntau suav nrog: tsis muaj cov qauv thoob ntiaj teb, cov cuab yeej tsim khoom lag luam tsawg dua, ntau yam khoom siv xws li chips, optical module thiab qhov dav dav hauv tshuab hluav taws xob tsis paub tab, tuaj yeem muab cov khoom lag luam thoob ntiaj teb kev lag luam WDM-PON txheej txheem kuj muaj suav. WDM-PON system raws li kev siv FP-LD txhaj tshuaj tiv thaiv txheej txheem, tam sim no tuaj yeem ua tiav 32 wavelengths, txhua qhov yoj ntawm 1.25Gb / s cov ntaub ntawv hloov mus, yog li ntawd tsis muaj ib qho muaj 20Gb / s bandwidth nce. Nyiv lub tuam txhab Fujitsu tseem tau tsim lub siab WDM-PON thev naus laus zis los txo tus nqi ntawm cov sijhawm luv luv thiab R-D tej dej num ntawm ONU kev hloov kho rau cov cuab yeej, qhia cov kev hloov pauv hloov ntawm GPON thiab WDM-PON nruab nrab. RSOA tsim kev siv WDM-PON platform, tuaj yeem xa 16 1.25Gb / s cov ntaub ntawv.
Daim duab 2 ONU tsis muaj qhov chaw WDM- PON system
Los ntawm cov xwm txheej tam sim no, tom qab PON EPON tom ntej thiab GPON thev naus laus zis feem ntau yuav mus rau 10GEPON thiab 10GGPON kev taw qhia, thiab WDM-PON feem ntau yog los ntawm tus nqi tsis tseem ceeb, nrog rau qhov tsis muaj tus tsim kev lag luam tsim nyog, cov neeg ua haujlwm nyob rau yav tom ntej tseem tsis tau loj. -saib kev xa tawm, tab sis vim yog qhov xwm txheej ntawm cov cuab yeej ntawm WDM-PON, vim nws txuas ntxiv rau kev paub tab, tej zaum yuav dhau los ua thev naus laus zis ntawm kev xaiv nyob rau lub sijhawm ntev.
WDM-PON nrog nws cov bandwidth loj muab tau ntseeg tias yog cov cim rau lwm tiam ntawm kev ua hauj lwm kho qhov muag. WDM-PON tuaj yeem siv rau ntau yam kev siv, xws li FTTx, kev sib hloov hauv zos thiab cov kis rov qab, tuaj yeem muab cov kev pabcuam tsis zoo rau cov neeg siv sib txawv. Txawm li cas los xij, vim muaj kev paub tab ntawm cov kev txwv tam sim no, cov cuab yeej siv nyiaj thiab kev tsim qauv ntawm cov lus thiab lwm cov khoom siv, tsuas yog ib qho khoom lag luam me siv rau hauv cov chaw sim, tab sis nrog kev txhim kho ntxiv thiab kev tsim kho thev naus laus zis, WDM-PON yuav nyob hauv yav tom ntej nkag tau rau hauv network qhov chaw los ua lub luag haujlwm zoo dua.
