Inqubekela phambili yocwaningo lwei-lithium niobate electro-optic modulator yefilimu encane
I-Electro-optic modulator iyithuluzi eliyinhloko lesistimu yokuxhumana kwe-optical kanye nesistimu ye-microwave photonic. Ilawula ukukhanya okusabalala esikhaleni esikhululekile noma ku-optical waveguide ngokushintsha inkomba yokukhanya kwezinto ezibangelwa insimu kagesi esetshenzisiwe. I-lithium niobate yendabukoi-modulator ye-electro-opticalisebenzisa izinto ze-lithium niobate ezinkulu njengezinto ze-electro-optical. Izinto ze-lithium niobate zekristalu eyodwa zihlanganiswa endaweni ukuze zenze i-waveguide ngokusebenzisa i-titanium diffusion noma inqubo yokushintshana kwe-proton. Umehluko wenkomba yokubuyisa phakathi kwesendlalelo esiyinhloko kanye nesendlalelo sokubopha mncane kakhulu, futhi i-waveguide inekhono eliphansi lokubopha ensimini yokukhanya. Ubude obuphelele be-modulator ye-electro-optic epakishiwe ngokuvamile buyi-5 ~ 10 cm.
Ubuchwepheshe be-Lithium Niobate on Insulator (LNOI) buhlinzeka ngendlela ephumelelayo yokuxazulula inkinga yobukhulu obukhulu be-lithium niobate electro-optic modulator. Umehluko wenkomba yokukhanya phakathi kwesendlalelo esiyinhloko se-waveguide kanye nesendlalelo se-cladding ufika ku-0.7, okuthuthukisa kakhulu ikhono lokubopha imodi ye-optical kanye nomphumela wokulawula i-electro-optical we-waveguide, futhi sekuyindawo yokucwaninga emkhakheni we-electro-optical modulator.
Ngenxa yentuthuko yobuchwepheshe be-micro-machining, ukuthuthukiswa kwama-modulators e-electro-optic asekelwe epulatifomu ye-LNOI kuye kwathuthuka ngokushesha, okubonisa ukuthambekela kobukhulu obuncane kanye nokuthuthuka okuqhubekayo kokusebenza. Ngokwesakhiwo se-waveguide esisetshenziswayo, ama-modulators e-lithium niobate electro-optic ajwayelekile angama-modulators e-electro-optic aqoshwe ngqo kuma-waveguide, ahlanganisiwe alayishiwe.ama-modulators e-waveguidekanye nama-modulators e-electro-optic ahlanganisiwe e-silicon ahlanganisiwe.
Njengamanje, ukuthuthukiswa kwenqubo yokuqopha okomile kunciphisa kakhulu ukulahleka kwe-thin film lithium niobate waveguide, indlela yokulayisha i-ridge ixazulula inkinga yobunzima benqubo yokuqopha ephezulu, futhi iqaphele i-lithium niobate electro-optic modulator ene-voltage engaphansi kwe-1 V half wave, futhi inhlanganisela nobuchwepheshe be-SOI obuvuthiwe ihambisana nomkhuba wokuhlanganiswa kwe-photon kanye ne-electron hybrid. Ubuchwepheshe be-thin film lithium niobate bunezinzuzo zokufeza ukulahleka okuphansi, usayizi omncane kanye ne-bandwidth enkulu ehlanganisiwe ye-electro-optic modulator ku-chip. Ngokwethiyori, kubikezelwa ukuthi i-3mm thin film lithium niobate push-pullAma-modulator e-M⁃ZI-bandwidth ye-electro-optical ye-3dB ingafinyelela ku-400 GHz, kanti i-bandwidth ye-thin film lithium niobate modulator elungiselelwe ngokuhlolwa ibikwe ukuthi ingaphezudlwana kwe-100 GHz, okusekude kakhulu nomkhawulo ophezulu wethiyori. Ukuthuthuka okulethwa ngokwenza ngcono amapharamitha ayisisekelo esakhiwo kunqunyelwe. Esikhathini esizayo, ngokombono wokuhlola izindlela ezintsha nezakhiwo, njengokuklama i-electrode ejwayelekile ye-coplanar waveguide njenge-electrode ye-microwave ehlukanisiwe, ukusebenza kwe-modulator kungathuthukiswa kakhulu.
Ngaphezu kwalokho, ukuqashelwa kokupakishwa kwama-chip e-modulator ahlanganisiwe kanye nokuhlanganiswa okungafani kwe-on-chip nama-laser, ama-detector kanye namanye amadivayisi kuyithuba kanye nenselele yokuthuthukiswa kwesikhathi esizayo kwama-modulator e-lithium niobate yefilimu encane. I-modulator ye-lithium niobate ye-electro-optic yefilimu encane izodlala indima ebaluleke kakhulu ku-photon ye-microwave, ukuxhumana kwe-optical kanye neminye imikhakha.
Isikhathi sokuthunyelwe: Ephreli-07-2025