Inqubekelaphambili yocwaningo lweifilimu elincanyana lithium niobate electro-optic modulator
I-Electro-optic modulator iyisisetshenziswa esiyinhloko sesistimu yokuxhumana ye-optical kanye ne-microwave photonic system. Ilawula ukukhanya okusakazeka endaweni ekhululekile noma i-optical waveguide ngokushintsha inkomba ye-refractive yezinto ezibangelwa inkambu kagesi esetshenziswayo. I-lithium niobate yendabukoi-electro-optical moduleisebenzisa izinto eziningi ze-lithium niobate njengempahla ye-electro-optical. I-crystal lithium niobate material eyodwa yenziwa endaweni ukuze yakhe i-waveguide ngokusebenzisa ukusabalalisa kwe-titanium noma inqubo yokushintshanisa i-proton. Umehluko wenkomba ye-refractive phakathi kwesendlalelo esiyinhloko kanye nesendlalelo sokugquma mncane kakhulu, futhi i-waveguide inamandla ampofu okubophezela kunkambu yokukhanya. Ubude obuphelele bemoduli ehlanganisiwe ye-electro-optic ngokuvamile bungu-5~10 cm.
Ubuchwepheshe be-Lithium Niobate ku-Insulator (LNOI) buhlinzeka ngendlela ephumelelayo yokuxazulula inkinga yobukhulu obukhulu be-lithium niobate electro-optic modulator. Umehluko wenkomba ye-refractive phakathi kwesendlalelo esiyinhloko se-waveguide kanye nesendlalelo sokuvala sifika ku-0.7, okuthuthukisa kakhulu ikhono lokubopha imodi yokubona kanye nomthelela wokulawula i-electro-optical we-waveguide, futhi isiphenduke indawo yocwaningo emkhakheni we-electro-optical modulator.
Ngenxa yenqubekelaphambili yobuchwepheshe be-micro-machining, ukuthuthukiswa kwamamojula we-electro-optic asekelwe kuplathifomu ye-LNOI kuye kwathuthuka ngokushesha, okubonisa umkhuba wosayizi ohlangene kanye nokwenza ngcono okuqhubekayo kokusebenza. Ngokwesakhiwo se-waveguide esisetshenzisiwe, ifilimu elincanyana elijwayelekile i-lithium niobate electro-optic modulators liqoshwe ngokuqondile ama-waveguide electro-optic modulators, i-hybrid elayishiwe.ama-waveguide modulatorskanye ne-hybrid silicon ehlanganisiwe ye-waveguide electro-optic modulators.
Njengamanje, ukuthuthukiswa kwenqubo yokubophela okomile kunciphisa kakhulu ukulahleka kwe-waveguide yefilimu elincanyana i-lithium niobate, indlela yokulayisha i-ridge ixazulula inkinga yobunzima benqubo yokuqopha okuphezulu, futhi ibone imodulator ye-lithium niobate electro-optic ene-voltage engaphansi kwe-1 V uhhafu wamagagasi, kanye nenhlanganisela nobuchwepheshe be-SOI obuvuthiwe buhambisana nomkhuba wokuhlanganiswa kwe-hybrid photon ne-electron. Ubuchwepheshe befilimu ye-lithium niobate yefilimu izacile bunezinzuzo ekuboneni ukulahlekelwa okuphansi, usayizi omncane kanye nomkhawulokudonsa omkhulu odidiyelwe we-electro-optic modulator ku-chip. Ngokombono, kubikezelwa ukuthi ifilimu elincanyana elingu-3mm lithium niobate push-pullImodeli ye-M⁃ZUmkhawulokudonsa ongu-3dB we-electro-optical ungafinyelela ku-400 GHz, futhi umkhawulokudonsa wemoduli ye-lithium niobate yefilimu ezacile elungiswe ngokuhlolwa kubikwe ukuthi ungaphezudlwana kuka-100 GHz, okusekude nomkhawulo ongaphezulu wethiyori. Intuthuko elethwa ngokuthuthukisa imingcele yesakhiwo inomkhawulo. Ngokuzayo, ngokombono wokuhlola izindlela ezintsha nezakhiwo, njengokuklama i-electrode evamile ye-coplanar waveguide njenge-electrode ehlukanisiwe ye-microwave, ukusebenza kwemoduli kungase kuthuthukiswe nakakhulu.
Ukwengeza, ukugcwaliseka kokupakishwa kwe-chip ye-modulator edidiyelwe kanye nokuhlanganiswa kwe-on-chip heterogeneous nama-lasers, imitshina kanye namanye amadivaysi kokubili kuyithuba kanye nenselele yokuthuthukiswa kwesikhathi esizayo kwama-modulators efilimu amancane e-lithium niobate. Ifilimu elincanyana i-lithium niobate electro-optic modulator izodlala indima ebaluleke kakhulu ku-microwave photon, ukuxhumana optical nezinye izinkambu.
Isikhathi sokuthumela: Apr-07-2025