Kupita patsogolo kwa kafukufuku wa modulator woonda wa lithiamu niobate electro-optic

Kupita patsogolo kwa kafukufukufilimu yopyapyala ya lithiamu niobate electro-optic modulator

Electro-optic modulator ndiye chida chachikulu cha makina olumikizirana ndi kuwala ndi makina ojambulira a microwave. Amawongolera kuwala komwe kumafalikira m'malo omasuka kapena chiwongolero cha mafunde a kuwala mwa kusintha chizindikiro cha refractive cha zinthu zomwe zimayambitsidwa ndi mphamvu yamagetsi yogwiritsidwa ntchito. Lithium niobate yachikhalidwemodulator yamagetsi ndi kuwalaimagwiritsa ntchito zinthu za lithiamu niobate zambiri ngati zinthu zamagetsi. Zinthu za lithiamu niobate za kristalo imodzi zimapangidwa m'deralo kuti zipange waveguide kudzera mu titanium diffusion kapena proton exchange process. Kusiyana kwa refractive index pakati pa core layer ndi cladding layer ndi kochepa kwambiri, ndipo waveguide ili ndi mphamvu yocheperako yolumikizira ku kuwala. Kutalika konse kwa electro-optic modulator yopakidwa nthawi zambiri kumakhala 5 ~ 10 cm.

Ukadaulo wa Lithium Niobate pa Insulator (LNOI) umapereka njira yothandiza yothetsera vuto la kukula kwakukulu kwa modulator ya lithiamu niobate electro-optic. Kusiyana kwa refractive index pakati pa waveguide core layer ndi cladding layer ndi 0.7, zomwe zimawonjezera kwambiri luso la optical mode binding ndi electro-optical regulation effect ya waveguide, ndipo yakhala malo ofufuzira kwambiri pankhani ya electro-optical modulator.

Chifukwa cha kupita patsogolo kwa ukadaulo wa ma micro-machining, chitukuko cha ma electro-optic modulators kutengera nsanja ya LNOI chapita patsogolo mwachangu, kusonyeza chizolowezi cha kukula kocheperako komanso kusintha kosalekeza kwa magwiridwe antchito. Malinga ndi kapangidwe ka waveguide komwe kamagwiritsidwa ntchito, ma electro-optic modulators a lithiamu niobate omwe ndi opyapyala kwambiri ndi ma waveguide electro-optic modulators omwe amajambulidwa mwachindunji, ophatikizidwa.ma modulators a waveguidendi ma modulators a electro-optic ophatikizidwa ndi silicon.

Pakadali pano, kusintha kwa njira yothira youma kumachepetsa kwambiri kutayika kwa filimu yopyapyala ya lithiamu niobate waveguide, njira yokweza ridge imathetsa vuto la kuvutika kwambiri kwa njira yothira, ndipo yazindikira modulator ya lithiamu niobate electro-optic yokhala ndi voltage yochepera 1 V theka la mafunde, ndipo kuphatikiza ndi ukadaulo wa SOI wokhwima kumagwirizana ndi momwe photon ndi electron hybrid integration zimakhalira. Ukadaulo wa lithiamu niobate wa filimu yopyapyala uli ndi zabwino pakukwaniritsa kutayika kochepa, kukula kochepa komanso bandwidth yayikulu yolumikizidwa ndi electro-optic modulator pa chip. Mwachidziwitso, zikunenedwa kuti 3mm thin film lithium niobate push-pullMa modulator a M⁃ZMphamvu ya 3dB electro-optical bandwidth imatha kufika pa 400 GHz, ndipo mphamvu ya bandwidth ya modulator yopyapyala ya lithiamu niobate yokonzedwa mwachiyembekezo yanenedwa kuti ili pa 100 GHz pang'ono, yomwe ikadali kutali ndi malire apamwamba a chiphunzitso. Kuwongolera komwe kumabwera chifukwa chokonza magawo oyambira a kapangidwe kake kuli kochepa. M'tsogolomu, poganizira za kufufuza njira zatsopano ndi kapangidwe kake, monga kupanga electrode yokhazikika ya coplanar waveguide ngati electrode ya microwave yogawidwa, magwiridwe antchito a modulator akhoza kuwonjezeredwa.

Kuphatikiza apo, kuzindikira kuphatikizika kwa ma chip a modulator ophatikizidwa komanso kuphatikizana kosiyanasiyana kwa ma laser, ma detector ndi zida zina ndi mwayi komanso vuto pakukula kwa ma modulators a lithium niobate a thin film. Thin film lithium niobate electro-optic modulator idzachita gawo lofunika kwambiri pa microwave photon, kulumikizana kwa optical ndi magawo ena.