Lithium tantalate (LTOI) kev kub ceevelectro-optic modulator
Cov ntaub ntawv thoob ntiaj teb kev lag luam txuas ntxiv mus ntxiv, tau tsav los ntawm kev siv dav dav ntawm cov thev naus laus zis tshiab xws li 5G thiab kev txawj ntse (AI), uas ua rau muaj teeb meem loj rau transceivers ntawm txhua theem ntawm cov khoom siv kho qhov muag. Tshwj xeeb, tiam tom ntej electro-optic modulator thev naus laus zis yuav tsum muaj kev nce ntxiv hauv cov ntaub ntawv hloov pauv mus rau 200 Gbps hauv ib qho channel thaum txo kev siv hluav taws xob thiab cov nqi. Ob peb xyoos dhau los, silicon photonics thev naus laus zis tau siv dav hauv kev lag luam optical transceiver, feem ntau yog vim qhov tseeb tias silicon photonics tuaj yeem tsim khoom loj siv cov txheej txheem CMOS paub tab. Txawm li cas los xij, SOI electro-optic modulators uas tso siab rau cov neeg nqa khoom sib cais ntsib cov teeb meem loj hauv kev siv bandwidth, kev siv hluav taws xob, kev thauj khoom pub dawb thiab kev hloov pauv tsis muaj kab. Lwm txoj hauv kev siv thev naus laus zis hauv kev lag luam suav nrog InP, nyias zaj duab xis lithium niobate LNOI, electro-optical polymers, thiab lwm yam kev sib koom ua ke ntawm ntau lub platform heterogeneous. LNOI suav hais tias yog qhov kev daws teeb meem uas tuaj yeem ua tiav qhov kev ua tau zoo tshaj plaws hauv ultra-siab ceev thiab qis zog hloov kho, txawm li cas los xij, tam sim no nws muaj qee qhov kev sib tw ntawm cov txheej txheem ntau lawm thiab tus nqi. Tsis ntev los no, pab pawg tau tshaj tawm cov yeeb yaj kiab lithium tantalate (LTOI) kev sib xyaw ua ke ntawm photonic platform nrog cov khoom siv hluav taws xob zoo heev thiab kev tsim khoom loj, uas xav tias yuav phim lossis ntau tshaj qhov kev ua tau zoo ntawm lithium niobate thiab silicon optical platforms hauv ntau daim ntawv thov. Txawm li cas los xij, kom txog rau thaum tam sim no, cov cuab yeej tseem ceeb ntawmoptical kev sib txuas lus, ultra-high-speed electro-optic modulator, tsis tau txheeb xyuas hauv LTOI.
Nyob rau hauv txoj kev tshawb no, cov kws tshawb fawb thawj zaug tsim LTOI electro-optic modulator, cov qauv uas tau qhia hauv daim duab 1. Los ntawm kev tsim cov qauv ntawm txhua txheej ntawm lithium tantalate ntawm cov insulator thiab qhov tsis sib xws ntawm microwave electrode, kev nthuav tawm. ceev sib piv ntawm microwave thiab lub teeb yoj hauv lubelectro-optical modulatortwb paub lawm. Nyob rau hauv cov nqe lus ntawm kev txo qhov poob ntawm lub microwave electrode, cov kws tshawb fawb nyob rau hauv no ua hauj lwm thawj zaug tau thov kev siv cov nyiaj raws li ib tug electrode cov ntaub ntawv uas zoo conductivity, thiab cov nyiaj electrode tau pom tias yuav txo tau lub microwave poob mus rau 82% piv rau. dav siv kub electrode.
FIG. 1 LTOI electro-optic modulator qauv, theem sib txuam tsim, microwave electrode tsis kuaj.
FIG. 2 qhia cov cuab yeej sim thiab cov txiaj ntsig ntawm LTOI electro-optic modulator raukev siv zog modulatedDirect detection (IMDD) hauv kev sib txuas lus kho qhov muag. Cov kev sim qhia tau hais tias LTOI electro-optic modulator tuaj yeem xa PAM8 cov cim ntawm qhov kos npe ntawm 176 GBd nrog ntsuas BER ntawm 3.8 × 10⁻² hauv qab 25% SD-FEC qhov pib. Rau ob qho tib si 200 GBd PAM4 thiab 208 GBd PAM2, BER tau qis dua qhov pib ntawm 15% SD-FEC thiab 7% HD-FEC. Qhov kev ntsuam xyuas qhov muag thiab histogram tau tshwm sim hauv daim duab 3 pom tau hais tias LTOI electro-optic modulator tuaj yeem siv rau hauv kev sib txuas lus ceev nrog cov kab siab siab thiab qis me ntsis yuam kev.
FIG. 2 Kev sim siv LTOI electro-optic modulator rauKev siv zog modulatedDirect Detection (IMDD) hauv kev sib txuas lus kho qhov muag (a) cov cuab yeej sim; (b) Qhov ntsuas me ntsis yuam kev tus nqi (BER) ntawm PAM8 (liab), PAM4 (ntsuab) thiab PAM2 (xiav) cov cim ua haujlwm ntawm tus nqi kos npe; (c) Extracted usable information rate (AIR, dashed line) thiab txuam net data rate (NDR, solid line) for measurements with bit-error rate values below the 25% SD-FEC limit; (d) Daim duab qhia qhov muag thiab cov ntaub ntawv keeb kwm hauv qab PAM2, PAM4, PAM8 kev hloov pauv.
Qhov kev ua haujlwm no ua rau pom thawj qhov kev kub ceev LTOI electro-optic modulator nrog 3 dB bandwidth ntawm 110 GHz. Hauv kev siv kev hloov kho ncaj qha IMDD kev sim kis tau tus mob, cov cuab yeej ua tiav ib tus neeg nqa khoom nqa cov ntaub ntawv tus nqi ntawm 405 Gbit / s, uas yog piv rau qhov kev ua tau zoo tshaj plaws ntawm cov khoom siv hluav taws xob uas twb muaj lawm xws li LNOI thiab plasma modulators. Nyob rau hauv lub neej yav tom ntej, siv ntau complexIQ modulatorcov qauv tsim los yog cov txheej txheem kho qhov teeb meem siab tshaj plaws, lossis siv cov microwave poob qis xws li quartz substrates, lithium tantalate cov cuab yeej xav kom ua tiav kev sib txuas lus ntawm 2 Tbit / s lossis siab dua. Ua ke nrog LTOI cov txiaj ntsig tshwj xeeb, xws li qis dua birefringence thiab qhov ntsuas qhov cuam tshuam vim nws cov ntawv thov dav hauv lwm lub lag luam RF lim, lithium tantalate photonics thev naus laus zis yuav muab cov nqi qis, qis zog thiab ultra-high-speed kev daws teeb meem rau lwm tiam neeg siab. -speed optical kev sib txuas lus network thiab microwave photonics systems.
Post lub sij hawm: Dec-11-2024