Optical module yog cov cuab yeej kho vajtse tseem ceeb kom paub txog kev sib txuas ntawm lub network hauv cov ntaub ntawv.Nrog rau qhov nce ntawm qhov chaw nres nkoj thiab qhov ceev, tus nqi ntawm cov khoom siv kho qhov muag yuav suav txog ze li ib nrab ntawm tus nqi ntawm cov khoom siv kho qhov muag hauv cov ntaub ntawv chaw.Tam sim no, 100G interconnection technology tau siv dav hauv cov ntaub ntawv tshiab tsim los ntawm cov tuam txhab loj hauv Internet, thiab 400G interconnection tshuab yuav siv dav hauv 1-2 xyoos tom ntej.Yog li ntawd, kev siv tshuab 400G optical module tau dhau los ua qhov tseem ceeb ntawm kev lag luam.
Nyob rau hauv cov nqe lus ntawm lub teeb yoj ntev, 400G lub teeb module tuaj yeem muab faib ua ntau hom (MM) thiab ib hom (SM).Raws li cov teeb liab modulation hom, nws tuaj yeem muab faib ua NRZ thiab PAM4 kev hloov pauv (PAM4 yog qhov tseem ceeb. Tam sim no).Raws li kev sib kis deb, 400G optical module tuaj yeem muab faib ua SR, DR, FR thiab LR.Los ntawm daim ntawv ntim, 400G optical module tuaj yeem muab faib ua CDFP, CFP8, OSFP, qsfp-dd thiab lwm yam.Hauv qab no yog cov kev faib tawm ntawm 400G optical module.
Thaum ntxov 400G optical module siv 16-channel 25Gbps NRZ kev siv (xws li 400g-sr16), siv CDFP lossis CFP8 pob.Qhov kom zoo dua ntawm NRZ yog tias nws tuaj yeem qiv los ntawm kev paub tab 25G NRZ thev naus laus zis ntawm 100G optical module, tab sis qhov tsis zoo yog tias nws xav tau 16 raws ntawm cov teeb liab rau kev sib txuas, nrog rau kev siv hluav taws xob loj thiab ntim, uas tsis haum rau kev siv cov ntaub ntawv center.
Hauv 400G optical module tam sim no, 8-channel 53GbpsPAM4 (400g-sr8, FR8, LR8) lossis 4-channel 106GbpsPAM4 (400g-dr4, FR4, LR4) yog siv los ua kom tiav 400G teeb liab kis tau tus mob hauv qhov chaw nres nkoj kho qhov muag, thiab 8 -channel 53GbpsPAM4 hluav taws xob teeb liab siv nyob rau hauv hluav taws xob chaw nres nkoj sab, txais yuav daim ntawv ntim ntawm OSFP los yog qsfp-dd.Ob qho OSFP thiab QSFP-DD pob khoom muab 8 - channel hluav taws xob teeb liab interfaces.Hauv kev sib piv, qsfp-dd pob loj me me (zoo ib yam li cov tsoos 100G optical module QSFP28 pob), uas yog qhov tsim nyog rau cov ntaub ntawv chaw siv.OSFP pob qhov loj me me yog qhov loj dua, vim tias tuaj yeem muab kev siv hluav taws xob ntau dua, yog li tsim nyog rau kev siv xov tooj.
Cov duab hauv qab no qhia txog kev siv 400g-fr8 / LR8 thiab 400g-fr4 raws
(Reference:OSFPMSA Specification rau OSFP OCTAL SMALLFORM FACTOR PLUGGABLE MODULE.)Nws tuaj yeem pom tias sab interface yog 8-channel 53Gbps PAM4 teeb liab.Rau 400g-sr8 / FR8 / LR8 thiab lwm yam modules,
CDR (clock restoration) thiab hluav taws xob / kho qhov muag lossis kho qhov muag / hluav taws xob hloov pauv tsuas yog ua hauv qhov kho qhov muag module.Yog li ntawd, qhov chaw nres nkoj kho qhov muag kuj yog 8-channel 53Gbps PAM4 teeb liab, ib yam li qhov chaw nres nkoj hluav taws xob ntsuas.Rau 400g-dr4 / FR4 / LR4 thiab lwm yam modules, muaj Gearbox chips hauv qhov kho qhov muag module uas multiplexes cov tswv yim ntawm ob. ports rau hauv ib lub teeb liab thiab hloov nws mus rau lub teeb, yog li qhov ceev ntawm qhov chaw nres nkoj optical yog ob zaug ntawm qhov chaw nres nkoj, uas yog, 106GbpsPAM4 teeb liab.
