Isivinini esiphezulu se-Lithium tantalate (LTOI)i-electro-optic modulator
Ithrafikhi yedatha yomhlaba wonke iyaqhubeka nokukhula, iqhutshwa ukwamukelwa kabanzi kobuchwepheshe obusha njenge-5G kanye nobuhlakani bokwenziwa (AI), okuletha izinselelo ezinkulu kuma-transceivers kuwo wonke amazinga amanethiwekhi optical. Ngokukhethekile, ubuchwepheshe be-electro-optic modulator yesizukulwane esilandelayo budinga ukwanda okukhulu kwamazinga okudlulisa idatha ku-200 Gbps esiteshini esisodwa ngenkathi kunciphisa ukusetshenziswa kwamandla nezindleko. Eminyakeni embalwa edlule, ubuchwepheshe be-silicon photonics busetshenziswe kabanzi emakethe ye-transceiver ye-optical, ikakhulukazi ngenxa yokuthi ama-silicon photonics angakhiqizwa ngobuningi kusetshenziswa inqubo ye-CMOS evuthiwe. Kodwa-ke, ama-modulators e-SOI electro-optic athembele ekusabalaleni kwe-carrier abhekene nezinselelo ezinkulu ku-bandwidth, ukusetshenziswa kwamandla, ukumuncwa kwe-carrier yamahhala kanye nokungahambisani kokuguquguquka. Eminye imizila yobuchwepheshe embonini ifaka i-InP, i-thin film lithium niobate LNOI, ama-polymers e-electro-optical, kanye nezinye izixazululo zokuhlanganiswa kwamapulatifomu amaningi. I-LNOI ibhekwa njengesixazululo esingafinyelela ukusebenza okuhle kakhulu ekushintsheni kwejubane eliphezulu kakhulu kanye namandla aphansi, noma kunjalo, okwamanje inezinselelo ezithile mayelana nenqubo yokukhiqiza ngobuningi kanye nezindleko. Muva nje, ithimba liqalise ipulatifomu ye-photonic ehlanganisiwe ye-lithium tantalate (LTOI) enezakhiwo ezinhle kakhulu ze-photoelectric kanye nokukhiqizwa okukhulu, okulindeleke ukuthi ifane noma idlule ukusebenza kwamapulatifomu e-lithium niobate kanye ne-silicon optical ezinhlelweni eziningi. Kodwa-ke, kuze kube manje, idivayisi eyinhloko yeukuxhumana okubonakalayo, i-electro-optic modulator yesivinini esiphezulu kakhulu, ayikaqinisekiswa ku-LTOI.
Kulolu cwaningo, abacwaningi baqale baklama i-LTOI electro-optic modulator, isakhiwo sayo esiboniswe kuMfanekiso 1. Ngokuklanywa kwesakhiwo sesendlalelo ngasinye se-lithium tantalate ku-insulator kanye namapharamitha e-electrode ye-microwave, ukuhambisana kwesivinini sokusabalala kwe-microwave kanye negagasi lokukhanya kui-modulator ye-electro-opticalkuyabonakala. Ngokuphathelene nokunciphisa ukulahleka kwe-electrode ye-microwave, abacwaningi kulo msebenzi okokuqala baphakamise ukusetshenziswa kwesiliva njengento ye-electrode enokuqhuba okungcono, futhi i-electrode yesiliva iboniswe ukuthi inciphisa ukulahleka kwe-microwave kube ngu-82% uma kuqhathaniswa ne-electrode yegolide esetshenziswa kabanzi.
ISITHOMBE 1 Isakhiwo se-modulator ye-electro-optic ye-LTOI, umklamo wokufanisa isigaba, ukuhlolwa kokulahlekelwa yi-electrode ye-microwave.
ISITHOMBE 2 sibonisa idivayisi yokuhlola kanye nemiphumela ye-modulator ye-LTOI electro-optic yeamandla aguquliweukutholwa okuqondile (IMDD) ezinhlelweni zokuxhumana kwe-optical. Ukuhlolwa kubonisa ukuthi i-modulator ye-electro-optic ye-LTOI ingadlulisela amasignali e-PAM8 ngesilinganiso sesibonakaliso esingu-176 GBd nge-BER elinganisiwe engu-3.8×10⁻² ngaphansi komkhawulo ongu-25% we-SD-FEC. Kuzo zombili i-PAM4 engu-200 GBd kanye ne-PAM2 engu-208 GBd, i-BER yayiphansi kakhulu kunomkhawulo ongu-15% we-SD-FEC kanye no-7% we-HD-FEC. Imiphumela yokuhlolwa kweso kanye ne-histogram ku-Figure 3 ibonisa ngokubonakalayo ukuthi i-modulator ye-electro-optic ye-LTOI ingasetshenziswa ezinhlelweni zokuxhumana ezisheshayo ezinomugqa ophezulu kanye nesilinganiso samaphutha aphansi e-bit.
UMFANELO 2 Ukuhlola kusetshenziswa i-LTOI electro-optic modulator yeUkuqina kulungisiweUkutholwa Okuqondile (IMDD) ohlelweni lokuxhumana kwe-optical (a) idivayisi yokuhlola; (b) Izinga lephutha le-bit elilinganisiwe (BER) lamasignali e-PAM8 (obomvu), i-PAM4 (oluhlaza) kanye ne-PAM2 (oluhlaza okwesibhakabhaka) njengomsebenzi wezinga lesibonakaliso; (c) Izinga lolwazi olungasetshenziswa olukhishwe (i-AIR, umugqa onamachashazi) kanye nezinga ledatha elihlobene (i-NDR, umugqa oqinile) wokulinganisa ngamanani ezinga le-bit-error ngaphansi komkhawulo we-25% SD-FEC; (d) Amamephu wamehlo kanye nama-histogram ezibalo ngaphansi kokuguqulwa kwe-PAM2, PAM4, PAM8.
Lo msebenzi ubonisa i-modulator yokuqala ye-LTOI electro-optic yesivinini esiphezulu ene-bandwidth engu-3 dB engu-110 GHz. Ekuhlolweni kokuguqulwa kokuguquguquka okuqondile kokuhlolwa kokudluliselwa kwe-IMDD, idivayisi ifinyelela izinga ledatha elilodwa le-carrier elingu-405 Gbit/s, elifana nokusebenza okuhle kakhulu kwamapulatifomu e-electro-optical akhona njenge-LNOI kanye nama-plasma modulators. Esikhathini esizayo, kusetshenziswa okuyinkimbinkimbi kakhulu.I-modulator ye-IQimiklamo noma amasu okulungisa amaphutha esignali athuthukile kakhulu, noma ukusebenzisa ama-substrate aphansi okulahlekelwa yi-microwave njenge-quartz substrates, amadivayisi e-lithium tantalate kulindeleke ukuthi afinyelele amazinga okuxhumana angu-2 Tbit/s noma ngaphezulu. Kuhlanganiswe nezinzuzo ezithile ze-LTOI, njenge-birefringence ephansi kanye nomphumela wesikali ngenxa yokusetshenziswa kwayo kabanzi kwezinye izimakethe zokuhlunga ze-RF, ubuchwepheshe be-lithium tantalate photonics buzohlinzeka ngezixazululo ezishibhile, ezinamandla aphansi kanye nesivinini esikhulu kakhulu zamanethiwekhi okuxhumana kwe-optical asheshayo esizukulwane esilandelayo kanye nezinhlelo ze-microwave photonics.
Isikhathi sokuthunyelwe: Disemba 11-2024