Inkqubela phambili yophandoi-lithium niobate electro-optic modulator yefilimu encinci
I-Electro-optic modulator sisixhobo esiphambili kwinkqubo yonxibelelwano lwe-optical kunye nenkqubo ye-microwave photonic. Ilawula ukukhanya okusasazeka kwindawo ekhululekileyo okanye kwi-optical waveguide ngokutshintsha i-refractive index yezinto ezibangelwa yintsimi yombane esetyenzisiweyo. I-lithium niobate yendabukoi-modulator ye-electro-opticalisebenzisa izinto ze-lithium niobate ezinkulu njengezinto ze-electro-optical. Izinto ze-lithium niobate zekristale enye zixutywe ngaphakathi ukuze zenze i-waveguide ngokusebenzisa i-titanium diffusion okanye inkqubo yokutshintshiselana ngeproton. Umahluko we-refractive index phakathi komaleko oyintloko kunye nomaleko we-cladding mncinci kakhulu, kwaye i-waveguide ayinakho ukubopha kakuhle kwindawo yokukhanya. Ubude obupheleleyo be-electro-optic modulator epakishiweyo budla ngokuba yi-5 ~ 10 cm.
Itekhnoloji yeLithium Niobate kwi-Insulator (LNOI) ibonelela ngendlela esebenzayo yokusombulula ingxaki yobukhulu obukhulu be-lithium niobate electro-optic modulator. Umahluko we-refractive index phakathi kwe-waveguide core layer kunye ne-cladding layer ufikelela kwi-0.7, nto leyo ephucula kakhulu amandla okubopha i-optical mode kunye ne-electro-optical regulation effect ye-waveguide, kwaye ibe yindawo ephambili yophando kwicandelo le-electro-optical modulator.
Ngenxa yenkqubela phambili kwetekhnoloji ye-micro-machining, uphuhliso lwee-electro-optic modulators ezisekelwe kwiqonga le-LNOI luye lwenza inkqubela phambili ngokukhawuleza, lubonisa umkhwa wobukhulu obuncinci kunye nokuphuculwa okuqhubekayo kokusebenza. Ngokwesakhiwo se-waveguide esisetyenzisiweyo, ii-modulators ze-electro-optic ze-lithium niobate eziqhelekileyo zii-electro-optic modulators ezichongiweyo ngqo kwi-waveguide, ezifakwe i-hybrid.iimodulators zesikhokelo samazakunye nee-modulators ze-electro-optic ezihlanganisiweyo ze-silicon ezihlanganisiweyo ze-hybrid silicon.
Okwangoku, ukuphuculwa kwenkqubo yokugcaba okomileyo kunciphisa kakhulu ukulahleka kwe-thin film lithium niobate waveguide, indlela yokulayisha i-ridge isombulula ingxaki yobunzima benkqubo yokugcaba ephezulu, kwaye iqaphele i-lithium niobate electro-optic modulator ene-voltage engaphantsi kwe-1 V half wave, kwaye indibaniselwano netekhnoloji ye-SOI evuthiweyo ihambelana nomkhwa wokuhlanganiswa kwe-photon kunye ne-electron hybrid. Itekhnoloji ye-thin film lithium niobate inezibonelelo zokufezekisa ilahleko ephantsi, ubungakanani obuncinci kunye ne-bandwidth enkulu ye-electro-optic modulator edibeneyo kwi-chip. Ngokwethiyori, kuqikelelwa ukuba i-3mm thin film lithium niobate push-pullI-modulator ye-M⁃ZI-bandwidth ye-electro-optical ye-3dB inokufikelela kwi-400 GHz, kwaye i-bandwidth ye-thin film lithium niobate modulator elungiselelwe ngovavanyo ibikwe ukuba ingaphezulu nje kwe-100 GHz, nto leyo esekude kakhulu nomda ophezulu wethiyori. Uphuculo oluziswa kukwenza ngcono iiparameter zesakhiwo ezisisiseko lulinganiselwe. Kwixesha elizayo, ngokwembono yokuhlola iindlela ezintsha kunye nezakhiwo, ezinje ngokuyila i-electrode ye-coplanar waveguide standard njenge-electrode ye-microwave ehlukanisiweyo, ukusebenza kwe-modulator kunokuphuculwa ngakumbi.
Ukongeza, ukufezekiswa kokufakwa kweetshiphusi ze-modulator ezihlanganisiweyo kunye nokuhlanganiswa okungafaniyo kwee-on-chip kunye nee-laser, ii-detectors kunye nezinye izixhobo lithuba kunye nomceli mngeni kuphuhliso lwexesha elizayo lwee-modulators ze-lithium niobate zefilimu encinci. I-modulator ye-lithium niobate yefilimu encinci iya kudlala indima ebaluleke ngakumbi kwi-microwave photon, unxibelelwano lwe-optical kunye nezinye iinkalo.
Ixesha leposi: Epreli-07-2025