R & D keeb kwm yav dhau
Raws li cov qauv dav dav ntawm txoj kev loj hlob ntawm cov ntaub ntawv hauv zej zog, tag nrho cov ntaub ntawv tsim tawm los ntawm tib neeg thiab tshuab yuav txuas ntxiv nce ntxiv ntawm tus nqi ntawm 50-60% ib xyoos hauv 15 xyoo tom ntej. Txawm hais tias optical fiber network tuaj yeem muab kev sib txuas lus muaj peev xwm xav tau rau kev loj hlob sai ntawm cov ntaub ntawv xov xwm sib kis yav tom ntej yog qhov teeb meem tseem ceeb ntsig txog kev ruaj ntseg ntawm kev txhim kho cov ntaub ntawv thev naus laus zis. Qhov kev sib tw tseem ceeb uas nws ntsib yog yuav ua li cas txuas ntxiv nthuav dav optical channel bandwidth thiab teeb liab-rau-suab nrov piv los txhim kho cov ntaub ntawv xa tawm muaj peev xwm, tib lub sijhawm, tsis yog tsuas yog txo qis kev siv hluav taws xob hauv ib chav tsev, tab sis kuj txo qis tag nrho lub zog. noj ntawm cov channel, yog li thim rov qab tag nrho cov qauv uas lub zog noj nce nrog cov ntaub ntawv ntau. Cov cuab yeej siv thev naus laus zis ntawm lub cev uas sawv cev los ntawm cov chips optoelectronic thiab cov khoom siv yog qhov tseem ceeb los daws cov teeb meem tseem ceeb saum toj no thiab teeb meem caj dab.
Kev nce lub cim tus nqi (baud tus nqi) ntawm optical fiber kis tau tus mob tuaj yeem txo tus naj npawb ntawm cov chips thiab cov khoom siv ntawm qhov kawg ntawm kev sib txuas lus fiber ntau. Nws yog ib qho tseem ceeb uas yuav tsum tau ua kom ceev ceev, txo kev siv hluav taws xob thiab tswj cov nqi ntawm kev sib txuas lus fiber ntau optical. Tam sim no, kev lag luam coherent optical kis tau tus mob tau txais cov teeb liab ua tiav (DSP) nti ntawm 7nm txheej txheem ntawm, uas tuaj yeem txhawb nqa 800Gbit / s cov ntaub ntawv xa mus nrog tus qauv hloov kho hom ntawm 96G baud cim tus nqi thiab 64QAM. Tom ntej no tsab xov xwm kis tau tus mob system txais 5nm DSP, 130G baud cim tus nqi, QPSK modulation code hom, thiab tuaj yeem pab txhawb kev xa mus ntev nrog 400Gbit / s cov ntaub ntawv tus nqi ntawm 1500km. Txawm hais tias cov kauj ruam tom ntej tuaj yeem paub txog kev sib txuas lus kho qhov muag nrog cov cim tus nqi siab tshaj 200G baud tau dhau los ua qhov tseem ceeb ntawm kev lag luam. Qhov tseem ceeb nyob rau hauv seb optoelectronic chips thiab microelectronic chips tuaj yeem tawg los ntawm kev ua haujlwm tam sim no. Electro-optic modulator nrog ib tug super loj electro-optic bandwidth ntawm ntau tshaj 100GHz thiab ib tug ultra-tsawg tsav voltage ntawm tsawg tshaj li 1V yog lub ntsiab tseem ceeb ntawm optoelectronic nti kom ua tiav lub hom phiaj no.
Kev tsim kho tshiab loj
Thaum Lub Ib Hlis 2022, Sun Yat sen University, hauv kev koom tes nrog Huawei, tau tshaj tawm lub ntiaj teb thawj polarization multiplexing coherent light modulator nti raws lithium niobate zaj duab xis (M. Xu, et al. Tseem muaj ntau qhov kev sib tw los nce baud tus nqi siab dua 200Gbaud. Tag nrho cov optoelectronic Cheebtsam nyob rau hauv lub system yuav tsum muaj txaus bandwidth, thiab lub amplitude ntawm hluav taws xob tsav teeb liab ntawm siab baud tus nqi tsuas yog 100 millivolts, uas tso rau pem hauv ntej nruj raws li cov kev cai rau electro-optic modulator chips thiab xeem ntsuas.
Raws li kev ua haujlwm saum toj no, Niobium Austria Optoelectronics, Sun Yat sen University, Bell Laboratory (Fabkis), III-V Laboratory (Fabkis) thiab Zede Technology tau tsim ib pab pawg tshawb fawb thiab kev tsim kho kom zoo ntxiv thiab tsim kho qhov muag tsim thiab microwave. tsim ntawm lithium niobate zaj duab xis electro-optical modulator, siv quartz substrate kom ua tiav ultra-low microwave poob, thiab siv capacitive mus ncig yoj electrode kom tiav on-chip synchronous kis tau tus mob ntawm microwave tus nqi thiab lub teeb yoj tus nqi, ib tug high-kev ua tau zoo dual polarization coherent lub teeb modulator nrog 3dB electro-optical bandwidth mus txog 110 GHz thiab ib nrab nthwv dej voltage tsawg li 1 V tau ua tiav tiav, raws li qhia hauv daim duab 1. Yuav kom ua tiav cov kev sim sib kis tau ruaj khov, Niobio Optoelectronics kuj ua tiav qhov sib txuas ntawm qhov poob qis optical. fiber array thiab modulator nti, thiab pom tau hais tias lub ntim module uas muaj peev xwm flexibly teem RF interfaces.
Lithium Niobate Nyias Zaj duab xis IQ Modulator
Pab pawg sib koom ua ke tau paub ntxiv txog cov ntaub ntawv tawg 260G ultra-siab baud tus nqi DP-QPSK kev hloov kho (raws li qhia hauv daim duab 2) thiab ua kom pom 100km ib hom kev kho qhov muag fiber ntau kis los ntawm kev siv qhov kev ua tau zoo tshaj plaws ntawm kev ua haujlwm waveform generator (AWG), Deutsch M8199B tus qauv, nrog tus nqi piv txwv txog li 260Gsa / s thiab bandwidth tshaj 75GHz. Tsis tas li ntawd, 185G baud PCS{10}}QAM cov qauv kev txiav txim siab siab yog siv los ua kom tiav 1.84 Tb / s cov ntaub ntawv tau txais txiaj ntsig (AIR) (raws li qhia hauv daim duab 3). Kev ua tau zoo ntawm lithium niobate zaj duab xis modulator, xws li loj bandwidth thiab tsis tshua muaj tsav voltage, ua rau nws tsis tsim nyog siv nonlinear DSP algorithm thiab MLSE equalizer nrog complex algorithm nyob rau hauv kev sim kis tau tus mob, yog li tsim ib cov ntaub ntawv ntawm coherent optical kis tau tus mob dua nrog qis DSP complexity thiab siv zog.
Qhov kev ua haujlwm no qhia txog qhov tam sim no siab tshaj plaws ntawm kev sib txuas lus fiber ntau baud tus nqi
