Kev tshawb fawb txog kev nce qib ntawmzaj duab xis nyias lithium niobate electro-optic modulator
Electro-optic modulator yog lub cuab yeej tseem ceeb ntawm kev sib txuas lus optical thiab microwave photonic system. Nws tswj lub teeb propagation hauv qhov chaw dawb lossis optical waveguide los ntawm kev hloov pauv refractive index ntawm cov khoom siv los ntawm kev siv hluav taws xob. Cov lithium niobate ib txwm muajelectro-optical modulatorsiv cov khoom siv lithium niobate ua cov khoom siv electro-optical. Cov khoom siv lithium niobate siv lead ua ke yog doped hauv zos los tsim waveguide los ntawm titanium diffusion lossis proton pauv txheej txheem. Qhov sib txawv ntawm refractive index ntawm txheej core thiab txheej cladding yog me heev, thiab waveguide muaj peev xwm khi tsis zoo rau lub teeb pom kev zoo. Tag nrho qhov ntev ntawm cov electro-optic modulator ntim feem ntau yog 5 ~ 10 cm.
Cov thev naus laus zis Lithium Niobate on Insulator (LNOI) muab ib txoj hauv kev zoo los daws qhov teeb meem ntawm qhov loj ntawm lithium niobate electro-optic modulator. Qhov sib txawv ntawm refractive index ntawm cov txheej waveguide core thiab cov txheej cladding yog txog li 0.7, uas ua rau muaj peev xwm khi hom optical thiab electro-optical regulation effect ntawm waveguide zoo heev, thiab tau dhau los ua qhov chaw tshawb fawb hauv thaj chaw ntawm electro-optical modulator.
Vim yog kev nce qib ntawm cov thev naus laus zis micro-machining, kev tsim cov electro-optic modulators raws li LNOI platform tau ua tiav sai, qhia txog kev sib txawv ntawm qhov loj me me thiab kev txhim kho tas mus li ntawm kev ua tau zoo. Raws li cov qauv waveguide siv, cov yeeb yaj kiab nyias nyias lithium niobate electro-optic modulators yog cov etched waveguide electro-optic modulators ncaj qha, loaded hybridcov modulators waveguidethiab cov hybrid silicon integrated waveguide electro-optic modulators.
Tam sim no, kev txhim kho ntawm cov txheej txheem etching qhuav txo qhov poob ntawm cov zaj duab xis nyias lithium niobate waveguide, txoj kev thauj khoom ntawm txoj kev daws teeb meem ntawm qhov nyuaj ntawm cov txheej txheem etching siab, thiab tau pom tias lithium niobate electro-optic modulator nrog lub zog hluav taws xob tsawg dua 1 V ib nrab nthwv dej, thiab kev sib xyaw nrog cov thev naus laus zis SOI laus ua raws li qhov sib txawv ntawm photon thiab electron hybrid kev koom ua ke. Cov thev naus laus zis lithium niobate zaj duab xis nyias muaj qhov zoo hauv kev paub txog qhov poob qis, qhov loj me me thiab bandwidth loj kev koom ua ke electro-optic modulator ntawm nti. Hauv kev xav, nws tau kwv yees tias 3 hli zaj duab xis nyias lithium niobate thawb-rubM⁃Z modulators3dB electro-optical bandwidth tuaj yeem ncav cuag txog li 400 GHz, thiab bandwidth ntawm cov zaj duab xis nyias lithium niobate modulator uas tau npaj los ntawm kev sim tau tshaj tawm tias tsuas yog ntau dua 100 GHz, uas tseem nyob deb ntawm qhov kev txwv siab tshaj plaws. Kev txhim kho los ntawm kev ua kom zoo dua cov qauv yooj yim yog txwv. Yav tom ntej, los ntawm qhov kev xav ntawm kev tshawb nrhiav cov txheej txheem tshiab thiab cov qauv, xws li kev tsim cov qauv coplanar waveguide electrode ua ib qho segmented microwave electrode, kev ua haujlwm ntawm modulator yuav raug txhim kho ntxiv.
Tsis tas li ntawd xwb, qhov kev paub txog kev ntim khoom sib xyaw ua ke ntawm cov modulator chip thiab kev sib xyaw ua ke ntawm cov chip nrog lasers, detectors thiab lwm yam khoom siv yog ob qho tib si yog lub sijhawm thiab kev sib tw rau kev txhim kho yav tom ntej ntawm cov zaj duab xis nyias lithium niobate modulators. Cov zaj duab xis nyias lithium niobate electro-optic modulator yuav ua lub luag haujlwm tseem ceeb dua hauv microwave photon, kev sib txuas lus optical thiab lwm yam teb.
Lub sijhawm tshaj tawm: Plaub Hlis-07-2025