Hauv tsawg dua 10 xyoo, DWDM cov qauv tau los ntev, nrog cov khoom siv kho qhov muag tau ua me thiab sai dua. Nws tus nqi tau nce kaum npaug nyob rau tib lub sijhawm ua haujlwm: los ntawm 40 gigabytes hauv 2011 txog 400 gigabytes hnub no, nrog 800 gigabytes ntawm pluggable optical modules ntawm txoj kev ze rau yav tom ntej.
Cov lus qhia ntawm kev sib koom ua ke optics yog ib qho ntawm cov kev hloov tshiab tseem ceeb hauv kev txhim kho cov tshuab DWDM. Lub ntsuas hluav taws xob sib txuas siv cov khoom siv kho qhov muag tshwj xeeb thiab cov teeb liab digital processors (DSPs) xa thiab txais lub teeb tsa hluav taws xob tsis yooj yim, yog li ua tiav cov ntaub ntawv xa xov hluav taws xob loj. Nyob rau theem siab heev, kev txhim kho kev sib txuam tseem yog tus tsav lub zog tsav ntawm cov khoom siv hluav taws xob nrawm nrawm, suav nrog 400G thiab dhau mus.
Thawj qhov kev lag luam muag khoom muaj txiaj ntsig DWDM system yog 40G, ua raws 100G. Cov kab ke no ua raws kab npav thiab chassis, thiab muaj peev xwm txhawb nqa ntau kab npav kab hauv txhua qhov system thiab nqa mus rau tib qhov chaw raws li 10G tus nqi khoom yog cov kauj ruam loj rau tom ntej, uas tam sim no tuaj yeem hloov 100G tus nqi thiab nyob deb dua. Sij hawm dhau mus, kab npav daim npav khiav ceev tau nce mus rau 200 gigabytes lossis ntau dua, tab sis nrog cov huab ntawm cov chaw muab kev pab huab, txoj kev lag luam tab tom ze rau ntawm qhov kev xav ua tsis tau.
Raws li huab tes hauj lwm huab cua pib loj hlob exponentially, muaj kev nce zuj zus rau cov tuam ntxhab los tsim txawm tias cov me, sai dua, thiab cov khoom sib txuas hauv lub network pheej yig dua. Nws yog qhov ntsiab lus hais txog qhov no uas ua rau kev tsim" pizza box" DWDM system.
Lub" pizza box" system tshem tawm cov ntaub ntawv thiab cov npav phaib. Nws yog lub zog ua lub cev muag zaub-nyob ib leeg, qhov chaw xa cov ntaub ntawv me me nrog qhov siab ntawm 1 lossis 2RU (1.5" -3"). Tus yam ntxwv tsim khoom rau qhov muaj peev xwm ntawm" pizza thawv" pob tau qhov sib cais ntawm ob qhov tseem ceeb ntawm kev sib raug zoo ntawm cov khoom sib txuas: cov khoom siv kho qhov muag (laser, tus txais, kev hloov kho, thiab lwm yam) thiab DSP (digital signal processor), uas txog tam sim no tau nyob hauv cov qauv loj tau muab nruab rau hauv daim npav daim ntawv.
Kev tsim kho hauv optics tau ua rau qhov kev xav tau qis zog siv hluav taws xob thiab cov khoom me me. Cov kev hloov tshiab no tau ua rau Pluggable CFP2-ACO (Cov Khoom Sib Tw Uas Muaj Peev Xwm Kho Kom Zoo), ib qho me me ntawm Pluggable DWDM module rau CFP2. DSP thev naus laus zis tseem hloov zuj zus kom ib qho DSP nti tuaj yeem pab txhawb ntau hom CFP2-ACO.
Los ntawm tso ntau DSPs hauv" pizza thawv" uas tuaj yeem pab tau ntau yam CFP2-ACOs, cov tuam ntxhab tau tsim cov tshuab muaj peev xwm kis tau 2TBPS (20x100G tus neeg siv khoom sib txuas) tsis pub dhau ob chav khib (3 nti). Qhov tsis sib xws, lub kaw lus chassis raws tus yuav xav tau 12 chav khib. Ntxiv nrog rau kev txuag chaw, lawv kuj yog lub zog ntau dua.
Vim li cas CFP2-ACO hu ua" analog" ;? Yog' t cov tshuab digital digital thiab xoom? Qhov no yog qhov ci ntsa iab ntawm kev thev naus laus zis thev naus laus zis, uas hloov kho 1s thiab 0s rau hauv cov qauv sib txig sib xyaw, ntim ntau cov ntaub ntawv rau txhua qhov yoj, uas tuaj yeem txiav txim siab tom kawg ntawm lwm qhov kawg.
Tau kawg, qhov no yog qhov kev piav qhia yooj yim ntawm cov cim teeb liab sib txuas, tab sis tus yuam sij rau tus tsim tawm' s lub hom phiaj yog qhov xav tau los hloov cov xov tooj digital mus rau cov cim analog kom xa cov ntaub ntawv, thiab hloov cov lus sib txuas rov qab mus rau cov cim digital ntawm lwm qhov kawg. CFP2-ACO tsuas tuaj yeem ua cov kab ke sib piv, nws tau txais cov cim qhia tau zoo los ntawm DSP xa, lossis nws kis cov kab sib cuam tshuam cov lus qhia tau txais rau DSP rau kev hloov pauv mus rau cov cim digital.
CFP2-ACO cov kab ke ua kom muaj kev txhim kho nyob rau hauv kev txo qhov chaw ko taw, txo kev siv lub zog, thiab txo tus nqi ntawm cov khoom siv kho qhov muag, tshwj xeeb tshaj yog cov hloov. Cov platforms no tau dav dav thoob plaws hauv kev lag luam thiab tau dhau los ua daim qauv kev sib kis ntawm cov khoom siv kho qhov muag hauv txhua qhov chaw ua haujlwm huab.
Txij li kev qhia ntawm CFP2-ACO raws cov tshuab, cov neeg muag khoom tau tshaj tawm tshiab, sai dua" pizza thawv" cov tshuab uas tsis cia siab rau DWDM pluggable cov khoom siv. Cheebtsam kho qhov muag thiab DSPs nyob rau ntawm qhov chaw me me uas hloov tau cov npav lossis cov npav me me. Cov kab ke no tuaj yeem pab txhawb 600Gbps + ntawm ib lub yoj.
Tib lub sijhawm, nrog kev qhia ntawm CFP2-DCO, pluggable coherent DWDM optical devices txuas ntxiv tau tsim." D" sawv rau" tooj" hauv cov coherent optics. Ib zaug ntxiv, cov neeg tsim tawm ntawm cov khoom sib txuas tau txo qhov loj me thiab hwj chim kev siv ntawm lub Cheebtsam, yog li ob lub kho qhov muag thiab DSP tau nyob hauv CFP2.
Qhov no tshem tawm qhov xav tau ntawm kev hnav khib kom haum raws li DSPs, cia rau kev sib koom ua ke DWDM hloov ncaj qha los ntawm cov routers lossis hloov chaw, uas yog qhov tig tau rau DWDM thiab kev sib tos ntawm router.
Coherent optical modules tam sim no tau tsim los rau 400G ZR thiab 400G ZR + hauv QSFP-DD pob khoom, siv cov thev naus laus zis zoo ib yam li CFP2-DCO, tab sis ntawm qhov loj me me. Xws li cov pob khoom haum muaj 400G coherent DWDM optical devices, uas muaj tseeb muab cov kev daws teeb meem rau cov kev hla thiab DWDM fusion.
