Qhov ntsuas hluav taws xob tau tsim kho mus rau kev kub ceev thiab kev koom ua ke. Telecom thiab cov chaw khaws ntaub ntawv yog ob daim ntawv thov tseem ceeb. Cov kho qhov muag tau muab faib ua 10Gb / s, 25Gb / s, 50GB / s, 100GB / s, 400Gb / s, thiab lwm yam raws li qhov nrawm, lawv tuaj yeem faib ua SFP +, SFP28, QSFP 28, CFP2, QSFP-DD, OSFP, thiab lwm yam raws li kev sib kis, lawv tuaj yeem faib ua 100m, 500m, 2km, 10km, 40km, 80km, thiab lwm yam; raws li cov qauv tsim tawm, nws tuaj yeem muab faib ua NRZ kev siv hluav taws xob ntau, pam4 kev siv tes taws tes taw, DP-QPSK / NQAM theem tes taws los txiav txim siab Raws li WDM tau txais kev txhawb nqa, nws tuaj yeem muab faib ua lub teeb grey thiab xim teeb pom kev zoo; raws li kev ua haujlwm kub sib txawv, nws muaj peev xwm raug faib ua lag luam qib thiab qib qib kev lag luam.
Telecom thiab cov chaw pabcuam cov ntaub ntawv yog ob daim ntawv thov tseem ceeb ntawm optical module, uas txhawb kev tsim kho ntawm optical module thev naus laus zis kom muaj kev kub ceev thiab kev sib koom ua ke ntau dua. Hauv kev sib txuas lus txawb pem hauv ntej network, optical module tau hloov kho ntawm 10Gb / s txhawb nqa 4G CPRI interface rau 25Gb / s txhawb 5G ecpri interface; optical module hauv nruab nrab rov qab kis tau sib kis network tau hloov zuj zus los ntawm 50GB / s, 100GB / s mus rau 200GB / s thiab 400Gb / s. Hauv cov tsoos peb-txheej hloov architecture ntawm cov ntaub ntawv chaw, tus nqi kho qhov muag tau hloov kho rau 25/50/100/200 / 400Gbps; nyob rau hauv tus tshiab ob-txheej hloov architecture, tus nqi kho qhov muag tau hloov zuj zuj mus rau 800Gb / s. Xyoo tsis ntev los no, nrog txoj kev txhim kho nrawm nrawm nrawm nrawm ntawm kev siv bandwidth thiab kho tshuab kho qhov muag, qhov kev teeb tsa ntawm optical module photoelectric interface thiab ntim daim ntawv sau nyob hauv tsev thiab txawv teb chaws tau raug txhawb ib txhij.
800Gbase-r cov ntsiab lus txhais tau lub hauv paus txheej txheem ntawm 800G network, uas xav tias yuav ua ob zaug kev ua tau zoo dua kom tau raws li cov kev xav tau ntawm cov ntaub ntawv nruab nrab. Hauv aDDition rau txheej txheej hauv theem ntawm lub network, pab pawg 800G pluggable MSA tau tshaj tawm 800 Gbps Ethernet kis tshwj xeeb raws li pam-4 kev hloov kho thev naus laus zis rau cov ntaub ntawv chaw thov thaum lub Cuaj Hlis 2019.
800G SR8: tus nqi tsim nyog rau 8x100G module rau cov ntawv xa xov luv luv uas tuaj yeem xa mus rau 60-100 meters dhau ib hom fiber ntau.
800G FR4: 4x200G optical module, xav tau los txhawb nqa FEC tshiab.
Tsis tas li ntawd, pluggable optical modules, QSFP112-DD thiab OSFP 32 ntim cov hom ntim khoom kuj tseem raug coj los siv nyob rau hauv qhov kev qhia tshwj xeeb, thiab cov pluggable optical modules tseem yog qhov kev xaiv zoo tshaj plaws rau 800G cov chaw khaws ntaub ntawv thiab cov neeg ua haujlwm.
Thawj 800G QDFP dual ntom pluggable optical module txheem txiav txim siab qhov loj me ntawm 800G optical module - QSFP-DD800. Nws tau tshaj tawm tias cov khoos phis tawm kho qhov muag tuaj yeem pab txhawb yim qhov kev kub ceev, txhua channel khiav ceev yog 100G / s, thiab tuaj yeem sib haum nrog QSFP-DD, QSFP +, QSFP28, QSFP56 thiab lwm cov qauv kho qhov muag, muab cov neeg ua haujlwm hauv network nrog kev yooj yim thiab qhov zoo hauv 800G Ethernet xa tawm.
8 × 100G daws
800G SR qhov xwm txheej xav tau
Rau daim ntawv thov luv nrug teeb meem, nqi yog qhov tseem ceeb ntawm kev saib xyuas, thiab hom module no mas xaiv los ntawm ultra loj teev cov ntaub ntawv chaw lag luam. Lub hom phiaj ntawm MSA yog txhawm rau txhim kho qhov qes-nqi 8 × 100G module rau SR xwm txheej, npog cov ntsiab lus zoo tshaj plaws ntawm 60-100m. MSA yuav txhais cov PMD uas tsis raug them nqi tsawg rau ib hom kev sib kis fiber ntau raws 100G pam4. Ntxiv rau, rau SR Daim Ntawv Thov nrog qeeb qeeb, KP4 FEC yuav siv rau hauv 800G MSA optical module kom tau txais kev ua yuam kev. Lwm qhov DSP algorithms tseem suav nrog moos yooj yim rov qab thiab vaj huam sib luag. Thaum kawg, MSA yuav muab ib lub xov tooj txuas rau psm8 module, uas tuaj yeem kiv cua mus rau 8x100G.
8 × 100G kev npaj ua haujlwm rau cov tswv yim
Hauv qhov kev hloov pauv los ntawm 400G-sr8 txog 800G-SR8, ib qho channel nkaus 100G tus nqi yuav txwv cov kev daws teeb meem raws li multimode fiber (MMF). Raws li cov qauv theoretical siv hauv IEEE, peb tuaj yeem kwv yees tias thaum tus nqi baud yog siab txog li 50G, qhov kis tau mus deb uas MMF tuaj yeem txhawb tau tsis tshaj 50m. Cov kev txwv ncua kev txiav txim siab yog cov qauv kev siv bandwidth ntawm VCSEL thiab inter hom kev faib tawm ntawm MMF. Los ntawm kev ua kom zoo dua ntawm cov cuab yeej, cov xov xwm fiber ntau thiab txhim kho DSP algorithm, 100m kev sib kis tau tuaj yeem pom ntawm cov nqi ntawm tus nqi siab dua, qeeb dua thiab siv zog ntau dua. Yog li no, MSA pluggable 800G optical module ua hauj lwm pab pawg pom zoo siv cov kev xa mus rau ib hom kev siv thev naus laus zis kom paub txog 800G-SR8 qhov kev sib tshuam.
4 × 200G FR daws
800G FR thov kev tsom xam
Ib qho channel 200G pam4 thev naus laus zis yog qhov tom ntej kev ua haujlwm loj ntawm kev siv hluav taws xob kho kom zoo thiab kev sib cais ncaj qha. Nws yuav dhau los ua lub hauv paus ntawm 4-channel 800G kev sib txuas thiab cov khoom siv theem pib ntawm 1.6tb / s kev sib tshuam hauv lub neej yav tom ntej. MSA yuav txhais tag PMD thiab qee cov txheej txheem PMA, suav nrog cov tshiab siv hluav taws xob tsawg, ncua sij hawm qeeb FEC cov phiaj xwm ua ib pob dhau ntawm KP4 FEC ntawm 112G hluav taws xob cov lus taw qhia los txhim kho net coding nce (NCG) modem. Ib qho ntawm lub hom phiaj tseem ceeb ntawm kev lag luam kev lag luam yog txhawm rau tsim cov kab hluav taws xob dav dav tshiab thiab cov khoom siv hluav taws xob sib piv rau cov khoom xa thiab txais cov khoom, suav nrog digital mus rau cov hloov khoom thiab cov khoom sib piv rau digital (AD / DA). Yuav kom ua tau raws li cov khoom siv hluav taws xob nruj uas yuav tsum tau them ntawm pluggable modules, DSP nti nrog qis nm tus lej yuav raug tsim nyob rau hauv CMOS thev naus laus zis, thiab cov hluav taws xob muaj zog ua teeb meem algorithm yuav raug siv kom ua tiav channel sib npaug.
Qhov ua tau ntawm 4 × 200G cov txheej txheem
Xav tias qhov ntsuas kub tswj ntawm Tec xav tau hauv LAN WDM, thiab tsis muaj kev tswj xyuas qhov ntsuas kub nyob hauv ib qho channel 200G cov phiaj xwm, lub zog noj yuav raug ntsuas raws cwdm4. Txuas cov kab ntxig tsis txaus, kev cuam tshuam ntau yam (MPI), pab pawg ncua sij hawm qeeb (DGD) thiab cov khoom xa tawm dispersion poob (TDP) pab txuas rau kev siv fais fab. Raws li tus qauv luam tawm los ntawm IEEE tus qauv, qhov muab xam ntawm MPI thiab DGD poob yog qhia nyob rau hauv Table 4. Xav txog qhov nce ntawm baud tus nqi ntawm 200G nyob rau hauv ib qho channel, qhov kev poob tawm yog cia siab tias yuav loj dua 100G. Cov lus qhia tsim nyog ntawm kev xa mus dispersion dispersion poob (TDP) yog 3.9 db. Yog li no, xav txog cov laus ntawm cov txais thiab cov seem txuas tsis tau, nrog rau kev sib kis ntawm cov khoom siv fais fab tsis zoo ntawm cov khoom xa tawm, peb xav tias cov khoom txais txais zoo yuav tsum yog txog - 5 DBM.
Cov teeb meem daws tau rau 800G DR
Hauv ib lub 800 DR txheej xwm, muaj plaub txoj hauv kev. Ua ntej tshaj, 800G SR8 kev daws teeb meem nyob rau hauv 800G MSA tuaj yeem txhais kom ntev kev pab cuam mus txog 500m. Txij li thaum cov ntsiab lus sib txig fiber ntau yuav tsum tau siv cov channel ntau, qhov kev txiav txim siab tseem ceeb hauv qhov no yog tus nqi mus txog 500m ntawm fiber ntau. Thib ob, daws 2x400G cwdm4 daws ob npaug ntawm cov transmitter thiab receiver sib luag siv cov kev daws teeb meem FR4. Txoj kev daws teeb meem zoo li lawv sib npaug ntawm cov khoom siv fiber ntau thiab kev siv tshuab thev naus laus zis. Txawm li cas los xij, kev siv fais fab thiab teeb tsa tus nqi yog qhov kev txwv loj. Thib peb, tiam tom ntej ntawm ib qho channel 200G kev daws teeb meem yuav npog qhov xwm txheej no. Txoj kev daws teeb meem tau txiav txim siab tsuas yog 4 khub ntawm cov hloov pauv thiab cov kis tau txais nrog tus nqi qis thiab siv fais fab. Raws li rau lub sijhawm muaj ntawm qhov kev daws teebmeem, nws tseem xav tau kev kawm kev ua haujlwm thiab kev lag luam kev paub tab. Hauv cov ntsiab lus, ntau txoj kev daws teeb meem tau tham txog rau rooj plaub siv DR. MSA yuav taug qab cov kev tsim kho thev naus laus zis thiab tawm tswv yim rau daim ntawv thov no rau yav tom ntej.
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