DWDM ntom nti ntom nti faib cov cuab yeej ntau yam sib txawv muaj qhov ntev, qhov siab, qhov sib kis tau zoo muaj peev xwm xa tau; CWDM coarse wavelength faib multiplexing cov cuab yeej siv tau tus nqi tsawg. Yog li yuav ua li cas yog tias peb xaiv txoj cai nthwv dej faib cov khoom siv sib txuam ntau kom tsim tau tus nqi tsim hluav taws xob kho qhov muag?
Qhov sib txawv ntawm CWDM thiab DWDM yog dab tsi?
Tam sim no, txoj hauv kev zoo los daws cov teeb meem ntawm nce cov ntaub ntawv xa xov kis kab mob yog siv CWDM thiab DWDM cov khoom siv, tab sis lawv muaj ntau yam sib txawv.
(1) Channel qhov nrug ntawm CWDM WDM khoom siv thiab DWDM WDM khoom
Channel spacing yog txhais raws li qhov sib txawv ntawm nominal tus neeg nqa khoom zaus ntawm ob qho kho qhov muag txuas, uas feem ntau siv los tiv thaiv kev cuam tshuam ntawm cov channel. CWDM wavelength division multiplexing cov cuab yeej muaj qhov dav dav dua DWDM wavelength division multiplexing cov khoom. Nws tuaj yeem xa 18 wavelengths nyob rau hauv daim phiaj spectral los ntawm 1271 nm rau 1611 nm, thiab cov kem channel yog 20 nm. DWDM tuaj yeem xa 40, 80 lossis 160 wavelengths nrog channel qhov sib txawv ntawm 0.8 nm.
(2) Kev sib kis tau nrug deb ntawm CWDM thiab DWDM
Vim tias lub nthwv dej ntawm DWDM ua rau cov txheej txheem ntawm cov kis tau muaj fiber ntau ntau, DWDM tuaj yeem xa mus ntev dua li CWDM. Tam sim no, CWDM WDM cov khoom siv tuaj yeem ua' t paub qhov tsis paub qhov kev xa mus ntev, nws qhov kev sib kis tau ntev tshaj plaws tsuas yog 160 km, thiab cov kis ntawm cov khoom siv DWDM deb tshaj li cov khoom siv CWDM.
(3) Modulated laser ntawm CWDM thiab DWDM
Cov kab ke ntawm CWDM wavelength division multiplexing cov cuab yeej muaj qis dua qhov xav tau ntawm qhov ntsuas qhov ntsuas ntawm kev ntsuas, feem ntau siv cov laser tsis muaj pa; cov kab ke ntawm DWDM wavelength faib cov khoom siv sib txuam ntau yuav tsum tau siv cov cua txias laser, thiab cov cua txias laser txais kev tswj hwm qhov kev tswj hwm kub, uas ua kom paub tias DWDM system muaj cov kev ua tau zoo dua, kev ruaj ntseg dua thiab kev pab cuam lub neej ntev dua, yog li DWDM wavelength faib multiplexer zoo dua li cov tsis muaj laser. CWDM cuab yeej siv ntawm lub tshuab laser ntau lub zog.
(4) Tus nqi ntawm CWDM WDM khoom siv thiab DWDM WDM khoom
Vim tias qhov ntsuas kub ntawm DWDM kev tsis sib txawv rau hauv qhov muaj ntau qhov ntau thiab tsawg, qhov nqi ntawm DWDM system tau nce thaum cov cua txias laser siv los kho qhov ntsuas qhov kub. Ntxiv rau, DWDM systems feem ntau yog plaub rau tsib zaug kim dua li CWDM systems. Txawm li cas los xij, nrog qhov nce nrov ntawm DWDM, tus nqi ntawm DWDM optical module yog kwv yees li 20% - 25% qis dua li ntawm CWDM optical module.
Qhov twg CWDM / DWDM WDM khoom siv tau zoo dua?
Kev Siv Khoom Siv CWDM / DWDM WDM
Vim tias qhov kev thov nce bandwidth, DWDM tau muaj kev nce qib hauv kev txo nqi, yog li nws muaj ntau thiab ntau nrov hauv khw. Txawm li cas los xij, CWDM tseem muaj tus nqi siab dua nyob rau hauv qhov teeb meem ntawm kev sib txuas cov nqi qis dua 10g thiab luv xa mus. Nyob rau hauv cov ntaub ntawv qis tus nqi network tsim kho, nws tseem yog qhov khoom siv tshaj plaws.
Kev sib kis tau txuas nrog CWDM / DWDM WDM khoom
CWDM WDM cov cuab yeej siv thiab DWDM WDM cov cuab yeej muaj lawv tus kheej zoo hauv OTN network. Qhov kom zoo dua ntawm CWDM WDM cov khoom siv yog tias nws tuaj yeem siv cov kev siv tawm tswv yim qis qis tsis muaj qhov txias thiab tsis dhau lub siab dhau qhov lim. Yog li ntawd, cov kab ke ntawm CWDM WDM cov cuab yeej siv dav siv hauv cov kab ke ntawm DWDM WDM cov cuab yeej siv. Txawm hais tias siv CWDM thev naus laus zis hauv DWDM system tseem tuaj yeem siv cov qauv kho qhov muag pheej yig dua, vim yog qhov loj ntawm cov kab tawm ntawm CWDM, cov xov tooj ntawm cov yoj hluav taws xob muaj nyob rau hauv lub kaw lus yuav raug txo, uas txwv qhov kis tau ntawm lub zog. Yog li no, rau qee qhov, nws tsis tuaj yeem ntes nrog cov cuab yeej tsis yog DWDM WDM.
Yuav teeb CWDM / DWDM WDM cov khoom network tsom xam li cas？
1. Tus neeg siv xav tau
(1) Kev nthuav dav thiab txhim kho: txuas 40ch DWDM WDM cov khoom siv rau 1550nm channel ntawm 8CH CWDM WDM cov khoom siv kom paub cov channel sib xyaw.
(2) Qhov yuav tsum tau muaj: qhov txuas ntev yog 65km, thiab ob lub nras xav tau ntxiv nyob 15km thiab 50km.
2. Lub phiaj xwm tsim
(1) Vim li cov kev txwv ntawm qhov bandwidth, nws tsis muaj peev xwm nthuav tau 40 DWDM channel, yog li FS engineers siv 8CH c27-c34 DWDM WDM cov khoom siv los ua kom tau raws li daim ntawv thov cov cai ntawm cov neeg siv khoom.
(2) Vim tias cov khoom siv hauv WDM poob, OADM thiab tag nrho cov fiber ntau tsawg dua 23dB, cov khoom tso tawm ntawm ib qho channel tuaj yeem nthuav dav rau 8dB los ntawm kev siv lub tshuab ua kom nrov, kom thiaj li ua kom zoo dua cov teeb liab zoo ntawm kev txuas thiab txo qhov kev ua yuam kev.
(3) Ntxiv 1ch OADM rau txhua cov node los mus rub tawm thiab teeb tsa cov cim.
Txog tam sim no, yog tias tus neeg siv' s WDM network xav tau ntau txoj kev xaib, lawv yuav tsum hloov mus rau DWDM khoom siv. Vim hais tias lub nthwv dej ntawm qhov sib nrug ntawm DWDM yog qhov tsawg, cov xov tooj ntawm cov channel tau raug tso tawm ntau heev, tab sis tus nqi ntawm txhua channel kuj tau nce siab. Yog li, cov neeg siv yuav tsum tau ntsuas qhov kev txhim kho yav tom ntej ntawm lawv cov lag luam ntim, thiaj li txiav txim siab seb yuav nruab CWDM WDM cov khoom siv nrog qhov tsis zoo ntawm tus nqi qis lossis DWDM cov khoom siv nrog qhov yooj ntawm cov nqi ntau dua thaum pib.
HTF' s cov khoom lag luam zoo tau lees tias, thiab cov khoom siv siv tau yog txawv txawv.
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