Lithium tantalate (LTOI) high-speed electro-optic modulator

Lithium tantalate (LTOI) kev kub ceevelectro-optic modulator

Kev thauj cov ntaub ntawv thoob ntiaj teb tseem niaj hnub loj hlob tuaj, vim muaj kev siv cov thev naus laus zis tshiab xws li 5G thiab kev txawj ntse (AI), uas ua rau muaj kev cov nyom loj rau cov transceivers ntawm txhua theem ntawm cov tes hauj lwm optical. Tshwj xeeb, cov thev naus laus zis electro-optic modulator tiam tom ntej xav tau kev nce ntxiv ntawm cov nqi hloov ntaub ntawv mus rau 200 Gbps hauv ib txoj kab ke thaum txo kev siv zog thiab cov nqi. Hauv ob peb xyoos dhau los, cov thev naus laus zis silicon photonics tau siv dav hauv kev lag luam optical transceiver, feem ntau yog vim qhov tseeb tias silicon photonics tuaj yeem tsim tau ntau yam siv cov txheej txheem CMOS laus. Txawm li cas los xij, SOI electro-optic modulators uas vam khom kev faib tawm ntawm cov neeg nqa khoom ntsib teeb meem loj hauv bandwidth, kev siv zog, kev nqus cov neeg nqa khoom dawb thiab kev hloov kho nonlinearity. Lwm txoj hauv kev thev naus laus zis hauv kev lag luam suav nrog InP, zaj duab xis nyias lithium niobate LNOI, electro-optical polymers, thiab lwm yam kev daws teeb meem sib xyaw ua ke ntau lub platform. LNOI raug suav hais tias yog qhov kev daws teeb meem uas tuaj yeem ua tiav qhov kev ua tau zoo tshaj plaws hauv kev ceev ceev ultra-high thiab kev hloov kho hluav taws xob tsawg, txawm li cas los xij, tam sim no nws muaj qee qhov kev cov nyom hauv cov txheej txheem tsim khoom ntau thiab tus nqi. Tsis ntev los no, pab neeg tau tsim ib lub lithium tantalate (LTOI) uas muaj cov khoom siv photonic zoo heev thiab kev tsim khoom loj, uas xav tias yuav phim lossis tshaj qhov ua tau zoo ntawm lithium niobate thiab silicon optical platforms hauv ntau daim ntawv thov. Txawm li cas los xij, txog tam sim no, lub cuab yeej tseem ceeb ntawmkev sib txuas lus pom kev, tus ultra-high speed electro-optic modulator, tsis tau raug txheeb xyuas hauv LTOI.

Hauv txoj kev tshawb fawb no, cov kws tshawb fawb tau tsim thawj lub LTOI electro-optic modulator, uas cov qauv tau pom hauv Daim Duab 1. Los ntawm kev tsim cov qauv ntawm txhua txheej ntawm lithium tantalate ntawm lub insulator thiab cov kev teeb tsa ntawm microwave electrode, qhov ceev ntawm kev sib kis ntawm microwave thiab lub teeb nthwv dej hauvelectro-optical modulatortau pom tseeb. Hais txog kev txo qhov poob ntawm lub microwave electrode, cov kws tshawb fawb hauv txoj haujlwm no thawj zaug tau hais kom siv nyiaj ua cov khoom siv electrode nrog kev coj ua zoo dua, thiab lub electrode nyiaj tau pom tias txo qhov poob ntawm microwave mus rau 82% piv rau lub electrode kub uas siv dav.

DUAB 1 LTOI electro-optic modulator qauv, theem sib phim tsim, microwave electrode poob xeem.

DUAB 2 qhia txog cov cuab yeej sim thiab cov txiaj ntsig ntawm LTOI electro-optic modulator rauqhov muaj zog hloov khoKev tshawb pom ncaj qha (IMDD) hauv cov kab ke sib txuas lus kho qhov muag. Cov kev sim qhia tau hais tias LTOI electro-optic modulator tuaj yeem xa cov cim PAM8 ntawm tus nqi cim ntawm 176 GBd nrog BER ntsuas ntawm 3.8 × 10⁻² qis dua 25% SD-FEC qhov txwv. Rau ob qho tib si 200 GBd PAM4 thiab 208 GBd PAM2, BER qis dua qhov txwv ntawm 15% SD-FEC thiab 7% HD-FEC. Cov txiaj ntsig ntawm qhov muag thiab histogram hauv Daim Duab 3 pom tseeb tias LTOI electro-optic modulator tuaj yeem siv rau hauv cov kab ke sib txuas lus ceev ceev nrog kev ncaj ncees siab thiab qhov yuam kev qis.

DUAB 2 Kev sim siv LTOI electro-optic modulator rauKev hloov kho qhov hnyavKev Tshawb Pom Ncaj Qha (IMDD) hauv lub kaw lus sib txuas lus kho qhov muag (a) cov khoom siv sim; (b) Tus nqi yuam kev ntsuas me ntsis (BER) ntawm PAM8 (liab), PAM4 (ntsuab) thiab PAM2 (xiav) cov cim ua haujlwm ntawm tus nqi kos npe; (c) Tus nqi ntaub ntawv siv tau rho tawm (AIR, kab dashed) thiab tus nqi ntaub ntawv net cuam tshuam (NDR, kab khoom) rau kev ntsuas nrog tus nqi yuam kev me ntsis qis dua 25% SD-FEC txwv; (d) Daim ntawv qhia qhov muag thiab cov duab histograms txheeb cais hauv qab PAM2, PAM4, PAM8 modulation.

Daim ntawv no qhia txog thawj lub LTOI electro-optic modulator ceev ceev nrog 3 dB bandwidth ntawm 110 GHz. Hauv kev sim IMDD kis tau tus mob uas siv zog ntau, lub cuab yeej ua tiav ib qho ntaub ntawv ntawm 405 Gbit/s, uas sib piv rau qhov ua tau zoo tshaj plaws ntawm cov platform electro-optical uas twb muaj lawm xws li LNOI thiab plasma modulators. Yav tom ntej, siv cov khoom siv nyuaj duaIQ modulatorcov qauv tsim lossis cov txheej txheem kho qhov yuam kev ntawm lub teeb liab siab dua, lossis siv cov khoom siv microwave poob qis dua xws li cov khoom siv quartz, cov khoom siv lithium tantalate yuav tsum ua tiav cov nqi sib txuas lus ntawm 2 Tbit / s lossis siab dua. Ua ke nrog LTOI qhov zoo tshwj xeeb, xws li birefringence qis dua thiab qhov cuam tshuam ntawm qhov ntsuas vim nws daim ntawv thov dav hauv lwm lub khw lim dej RF, lithium tantalate photonics thev naus laus zis yuav muab cov kev daws teeb meem pheej yig, qis zog thiab ultra-high-speed rau cov tes hauj lwm sib txuas lus optical ceev tom ntej thiab microwave photonics systems.