Tshawb nrhiav kev nce qib ntawmnyias zaj duab xis lithium niobate electro-optic modulator
Electro-optic modulator yog cov cuab yeej tseem ceeb ntawm kev sib txuas lus kho qhov muag thiab microwave photonic system. Nws tswj lub teeb propagating nyob rau hauv qhov chaw dawb los yog kho qhov muag waveguide los ntawm kev hloov lub refractive index ntawm cov khoom tshwm sim los ntawm kev siv hluav taws xob teb. Cov tsoos lithium niobateelectro-optical modulatorsiv cov khoom siv lithium niobate ua cov khoom siv hluav taws xob. Ib leeg siv lead ua lithium niobate cov khoom siv hauv zos doped los ua waveguide los ntawm titanium diffusion lossis proton txauv txheej txheem. Lub refractive index sib txawv ntawm cov tub ntxhais txheej thiab txheej cladding yog me me, thiab cov waveguide muaj peev xwm tsis zoo khi rau lub teeb teb. Tag nrho qhov ntev ntawm lub ntim electro-optic modulator feem ntau yog 5 ~ 10 cm.
Lithium Niobate ntawm Insulator (LNOI) thev naus laus zis muab txoj hauv kev zoo los daws qhov teeb meem loj ntawm lithium niobate electro-optic modulator. Lub refractive index sib txawv ntawm lub waveguide core txheej thiab cladding txheej yog mus txog 0.7, uas zoo heev txhim khu lub optical hom binding muaj peev xwm thiab electro-optical tswj nyhuv ntawm waveguide, thiab tau dhau los ua ib tug kev tshawb fawb hotspot nyob rau hauv lub tshav pob ntawm electro-optical modulator.
Vim qhov kev vam meej ntawm micro-machining thev naus laus zis, kev txhim kho ntawm electro-optic modulators raws li LNOI platform tau ua tiav sai, qhia txog qhov sib txawv ntawm qhov loj me me thiab kev txhim kho txuas ntxiv ntawm kev ua haujlwm. Raws li cov qauv waveguide siv, cov txheej txheem nyias zaj duab xis lithium niobate electro-optic modulators yog ncaj qha etched waveguide electro-optic modulators, loaded hybridwaveguide modulatorsthiab hybrid silicon integrated waveguide electro-optic modulators.
Tam sim no, kev txhim kho ntawm cov txheej txheem qhuav etching zoo heev txo qhov poob ntawm nyias zaj duab xis lithium niobate waveguide, ridge loading txoj kev daws qhov teeb meem ntawm cov txheej txheem siab etching nyuaj, thiab tau paub txog lithium niobate electro-optic modulator nrog ib qho hluav taws xob tsawg dua 1 V ib nrab nthwv dej, thiab kev sib xyaw nrog mature SOI thev naus laus zis ua raws li cov qauv ntawm electron integration. Nyias zaj duab xis lithium niobate thev naus laus zis muaj qhov zoo hauv kev paub txog qhov poob qis, me me thiab loj bandwidth integrated electro-optic modulator ntawm nti. Txoj kev xav, nws tau kwv yees tias 3 hli nyias zaj duab xis lithium niobate thawb-rubM⁃Z modulator cov3dB electro-optical bandwidth tuaj yeem ncav cuag li 400 GHz, thiab qhov bandwidth ntawm qhov kev sim npaj nyias zaj duab xis lithium niobate modulator tau tshaj tawm tias tsuas yog tshaj 100 GHz, uas tseem nyob deb ntawm qhov kev xav sab sauv. Qhov kev txhim kho coj los ntawm kev ua kom zoo rau cov txheej txheem ntawm cov txheej txheem yog txwv. Nyob rau hauv lub neej yav tom ntej, los ntawm qhov kev xav ntawm kev tshawb nrhiav cov txheej txheem tshiab thiab cov qauv tsim, xws li tsim cov txheej txheem coplanar waveguide electrode raws li ib feem ntawm microwave electrode, kev ua haujlwm ntawm lub modulator yuav raug txhim kho ntxiv.
Tsis tas li ntawd, lub realization ntawm kev sib xyaw modulator nti ntim thiab on-chip heterogeneous kev koom ua ke nrog lasers, ntes thiab lwm yam khoom siv yog ob qho tib si lub sijhawm thiab kev sib tw rau yav tom ntej txoj kev loj hlob ntawm nyias zaj duab xis lithium niobate modulators. Nyias zaj duab xis lithium niobate electro-optic modulator yuav ua lub luag haujlwm tseem ceeb hauv microwave photon, kev sib txuas lus kho qhov muag thiab lwm yam.
Post lub sij hawm: Apr-07-2025