Txuj ci

Kev loj hlob tawg ntawm huab xam, kev txawj ntse, thiab cov ntaub ntawv loj analytics tau ua rau muaj kev xav tau siab -bandwidth, qis-latency, lub zog-npaum, thiab nqi-zoo optical transceivers. Hauv cov ntsiab lus ntawm network architecture hloov zuj zus los ntawm 100G mus rau400Gthiab tshaj, lubQSFP-DDCov ntawv ntim khoom tau dhau los ua kev lag luam cov lus teb rau cov kev cov nyom no, ob npaug ntawm qhov muaj I / O ntom ntom thaum tswj kev rov qab sib raug zoo nrog cov uas twb muaj lawm.QSFPinfrastructure. Ntawm ntau yam QSFP-DD variants, DR4 (Dual Density 4-} txoj kab) kev daws teeb meem tshwj xeeb hauv cov ntawv thov nyob deb.

Qhov tseem ceeb ntawm QSFP-DD DR4

QSFP-DD DR4 optical transceiversyog ib qho tseem ceeb thev naus laus zis rau cov neeg ua haujlwm hauv cov chaw khaws ntaub ntawv txhawm rau txhim kho lawv cov kev sib txuas mus rau400G ceevyam tsis muaj kev cuam tshuam tag nrho cov infrastructure uas twb muaj lawm. Cov modules no xa 400Gbps throughput dhau ib zaug - hom fiber ntau mus txog 500 meters, ua hauj lwm intra-data center interconnections, sab saum toj- ntawm- khib rau cov tub ntxhais hloov kev sib txuas, thiab siab - kev ua tau zoo ntawm kev suav pawg. CovDR 4kev daws teeb meem feem ntau hais txog qhov ua kom qhov chaw nres nkoj ceev tshaj plaws hauv qhov chaw- ib puag ncig muaj kev txwv thaum muab txoj hauv kev pom tseeb los ntawm cov kab ke qub txeeg qub teg.

QSFP-DD DR4 Optical Module

Cov ntaub ntawv tus nqi architecture:TxhuaDR 4module muab400Gthroughput los ntawm kev siv plaub qhov kev sib txuas kho qhov muag, nrog rau txhua qhov kev ua haujlwm ntawm 100Gbps. Qhov no4x100Garchitecture ntiav PAM4 encoding kom ua tiav cov ntaub ntawv siab thaum tswj cov teeb liab kev ncaj ncees.

Kev sib kis nrug:DR4 modules txhawb kev sib kis ntawm ib leeg -mode fiber (OS2) txog 500 meters. Qhov kev ncua deb no tau ua kom zoo rau kev sib koom ua ke - cov ntaub ntawv chaw nruab nrab uas tsis tas yuav muaj kev ncua deb, tab sis kev ntseeg siab siab - kev sib txuas ceev yog qhov tseem ceeb.

Kev siv zog:Kev siv hluav taws xob zoo li qis dua 12 watts. Advanced thermal tswj xyuas kom ntseeg tau kev ua haujlwm txawm tias nyob rau hauv siab - kev xa tawm ceev.

Lub cev interface:Lub module nta 8-txoj kab hluav taws xob interface ua raws li covQSFP-DDspecification, nyob rau hauv ib daim ntawv ntawm kwv yees li 18.35mm × 89.4mm. Tus qauv tsim dual- ntom ntom tso cai rau 36 qhov chaw nres nkoj hauv 1U hloov, ob npaug ntawm qhov chaw nres nkoj ceev piv rau cov tsoosQSFPmodules.

Fiber hom thiab connector: DR 4feem ntau yog siv tib qho tib yam -mode fiber (OS2) nrogMPO connectors, xa 400Gbps kis tau tus mob hauv 500 meters. Qhov no txawv ntawmQSFP-100G-DR-Sstyle ib leeg-channel mus kom ze, raws li DR4 module ua haujlwm ua tiav400G transceiverdaws.

Qhov kub thiab txias:Feem ntau DR4 modules ua haujlwm tau zoo nyob hauv thaj tsam ntawm 0℃txog 70 degree.
 

Core Technologies thiab Cov Ntsiab Cai

PAM4 Modulation Technology

PAM4 (4-Level Pulse Amplitude Modulation) sawv cev rau kev hloov pauv tseem ceeb hauv kev siv tshuab kho qhov muag. Tsis zoo li NRZ ib txwm muaj (Tsis yog- Rov qab-rau-Zero) encoding, uas siv ob theem teeb liab los sawv cev rau cov ntaub ntawv binary, PAM4 ntiav plaub theem sib txawv los encode ob lub cim rau ib lub cim.
 

PAM4 ua haujlwm li cas:Nyob rau hauv lub teeb liab PAM4, txhua lub cim tuaj yeem sawv cev rau ib qho ntawm plaub lub xeev: 00, 01, 10, lossis 11. Qhov no ua tau zoo dua ob npaug ntawm cov ntaub ntawv xa mus tsis tau nce tus nqi baud. Piv txwv li, 26.5625 GBaud teeb liab siv PAM4 tuaj yeem xa 53.125 Gbps ntawm cov ntaub ntawv, thaum siv NRZ nws tsuas yog xa 26.5625 Gbps.

Qhov zoo rau DR4:PAM4 kev hloov pauv ua rau DR4 modules ua tiav 100Gbps rau ib lub channel yam tsis tas yuav tsum muaj ntau dhau - cov khoom siv hluav taws xob ntau zaus lossis kev sib cais nruj heev.

Kev txiav txim siab ntawm lub teeb liab:Piv rau NRZ, PAM4 cov teeb liab muaj suab nrov qis dua vim qhov sib nrug me me ntawm cov amplitude. Advanced forwarderror correction (FEC), digital signal processing (DSP), thiab precision analog circuitry ua hauj lwm ua ke kom tswj tau qhov kev ua yuam kev me ntsis txawm tias raug txo cov teeb liab - rau - suab nrov.

Gearbox Technology

Gearbox yog ib qho tseem ceeb tivthaiv uas txuas qhov ceev tsis sib haum xeeb ntawm tus tswv tsev hluav taws xob interface thiab optical channel tus nqi. HauvQSFP-DD DR4modules, Gearbox ua cov ntaub ntawv nyuaj hloov pauv thiab faib cov channel. Tus tswv tsev muab yim 50Gbps hluav taws xob raws (8 × 50G PAM4) ntawm qhov module interface. Lub Gearbox hloov qhov no 8-channel 400G hluav taws xob teeb liab mus rau plaub 100Gbps optical channels (4 × 100G PAM4) rau kev sib kis ntawm fiber ntau. Cov txheej txheem-paub kev ua haujlwm ntawm niaj hnub Gearbox tswj cov pob ntawv ciam teb, tswj kev khiav dej num, thiab ua raws cov ntaub ntawv hla ntau txoj hauv kev los tiv thaiv cov ntaub ntawv kev noj nyiaj txiag thaum hloov pauv.

Kev ua tau zoo optimization:Lub Gearbox tsim muaj xws li buffering, moos domain crossing circuits, thiab adaptive equalization kom txo qis latency thiab jitter. Cov yam ntxwv no txo ​​qhov nyiaj siv ua haujlwm uas hluav taws xob - mus rau - kev hloov kho qhov muag ntxiv rau tag nrho txoj kev xa mus.

MDC Interface

MDC interface yog tus qauv I2C- tau tshaj raws tu qauv uas muab kev saib xyuas yooj yim thiab tswj muaj peev xwm rauQSFP-DDmodules. Los ntawm MDC interface, cov neeg ua haujlwm hauv lub network tuaj yeem nkag mus tau tiag - cov ntaub ntawv sijhawm hais txog qhov ntsuas kub, qhov hluav taws xob, xa hluav taws xob kho qhov muag, tau txais lub zog kho qhov muag, thiab laser bias tam sim no. MDC interface tso cai rau tus tswv tsev los teeb tsa cov qauv ntsuas, txhawb nqa ntau yam kev xa tawm thiab cov tswv yim ua kom zoo.

QSFP-DD modules siv daim ntawv qhia kev cim xeeb uas tau teev tseg los ntawm kev lag luam tshwj xeeb, ua kom muaj kev sib raug zoo ntawm kev tswj hwm kev sib txuas ntawm cov neeg muag khoom, ua kom yooj yim rau kev tswj hwm network, thiab txo qis kev sib koom ua ke. Peb cov thev naus laus zis no ua haujlwm hauv kev hais kwv txhiaj kom ua tiav 400G kev sib kis tau zoo.QSFP-DD DR4optical modules yuav tsum ua raws li QSFP-DD MSA tus qauv, IEEE 802.3bs tus qauv, thiab OIF CEI-56G-PAM4 tus qauv.

Kev sib piv nrog FR4 / LR4

CovQSFP-DD 400Gseries suav nrog ntau hom kev sib txuas, txhua qhov ua tau zoo rau kev sib kis sib txawv. Peb qhov kev daws teeb meem tseem ceeb yog DR4, FR4, thiab LR4.

Kev sib piv ntawm peb 400G interfaces:

Optical Transmission Architecture:

Application Scenario Xaiv:

Nco tseg: Tus qauv DR4 yog txhais rau ib zaug - hom kev siv fiber ntau. Rau kev siv ntau hom fiber ntau, thov xa mus rau lwm cov qauv kev sib txuas xws li400g SR 8.

Hais txog hom connector,DR 4siv ibMPO-12parallel connector (8-core fiber ntau ribbon), thaumFR4thiabLR4siv duplexLC connectors(2-core single-mode). Deployments leveragingCisco DAC cablesyuav tsum xyuas kom meej compatibility nrog lub tshwj xeeb hloov platform thiab module neeg muag khoom ua ntej installation.

Qhov zoo ntawm DR4

Ntawm lub cev txheej,QSFP-DD DR4optical modules tuaj yeem xa 36400Gcov chaw nres nkoj hauv 1U ntawm qhov chaw khib - ob npaug ntawm qhov chaw nres nkoj ceev ntawm QSFP ib txwm muaj - uas txhais ncaj qha rau hauv kev txuag nqi rau cov chaw khaws ntaub ntawv nrog cov chaw kaw ntom nti. Hais txog kev siv hluav taws xob, DR4 modules khaws lub zog siv qis dua 12W, siv DFB lossis EML laser thev naus laus zis kom ua tiav siab -kev ua tau zoo ib zaug- hom kis tau tus mob; Kev txuag hluav taws xob sib xyaw yog qhov tseem ceeb ntawm qhov ntsuas, thaum tseem txo cov cua txias loads. Kev lag luam, DR4 siv ib zaug - hom fiber ntau (OS2) los muab kev ntseeg siab 500-meter kis tau tus mob, nrog rau cov nqi module30-50% qis dua FR4 / LR4. Tsis tas li ntawd, DR4 ua raws li tag nrhoQSFP-DDMSA thiab IEEE 802.3bs cov qauv, kom ntseeg tau ntau yam - neeg muag khoom sib cuam tshuam. Tib lub sijhawm,QSFP-DDcov chaw nres nkoj rov qab tau tshajQSFP/QSFP28modules, txhawb nqa lub tswv yim hloov kho lub network phased uas zoo tiv thaiv kev nqis peev uas twb muaj lawm.