Lithium tantalate (LTOI) babban na'ura mai daidaitawa ta lantarki

Lithium tantalate (LTOI) babban gudunelectrooptic modulator

Hanyoyin zirga-zirgar bayanai na duniya na ci gaba da haɓaka, wanda yaɗuwar ɗaukar sabbin fasahohi kamar 5G da kuma bayanan wucin gadi (AI), waɗanda ke haifar da ƙalubale masu mahimmanci ga masu wucewa a duk matakan hanyoyin sadarwa na gani. Musamman, fasahar modulator na zamani na gaba yana buƙatar haɓakar ƙimar canja wurin bayanai zuwa 200 Gbps a cikin tashar guda ɗaya yayin rage yawan kuzari da farashi. A cikin 'yan shekarun da suka gabata, an yi amfani da fasahar photonics na silicon a ko'ina a cikin kasuwar transceiver na gani, musamman saboda gaskiyar cewa ana iya samar da photonics na siliki ta hanyar amfani da balagaggen tsarin CMOS. Koyaya, SOI electro-optic modulators waɗanda suka dogara da tarwatsa mai ɗaukar hoto suna fuskantar ƙalubale masu girma a cikin bandwidth, yawan amfani da wutar lantarki, ɗaukar mai ɗaukar kaya kyauta da daidaitawar rashin daidaituwa. Sauran hanyoyin fasaha a cikin masana'antar sun haɗa da InP, fim na bakin ciki lithium niobate LNOI, polymers na gani na lantarki, da sauran hanyoyin haɗin kai na dandamali da yawa. Ana ɗaukar LNOI a matsayin mafita wanda zai iya cimma mafi kyawun aiki a cikin matsanancin saurin sauri da ƙarancin wutar lantarki, duk da haka, a halin yanzu yana da wasu ƙalubale dangane da tsarin samar da taro da farashi. Kwanan nan, ƙungiyar ta ƙaddamar da wani nau'in fim na lithium tantalate (LTOI) wanda aka haɗa da dandalin photonic tare da kyawawan kaddarorin kayan lantarki da manyan masana'antu, wanda ake sa ran ya dace ko ma ya wuce aikin lithium niobate da dandamali na silicon a yawancin aikace-aikace. Duk da haka, har yanzu, core na'urar nasadarwa na gani, ultra-high gudun electro-optic modulator, ba a tabbatar da shi a cikin LTOI ba.

A cikin wannan binciken, masu binciken sun fara tsara na'ura mai kwakwalwa ta LTOI, wanda aka nuna tsarinsa a cikin hoto na 1. Ta hanyar zane na tsarin kowane Layer na lithium tantalate akan insulator da sigogi na lantarki na lantarki, da yaduwa. madaidaicin saurin microwave da kalaman haske a cikinelectro-Optical modulatoran gane. Dangane da rage asarar na'urar lantarki ta microwave, masu bincike a cikin wannan aikin a karon farko sun ba da shawarar yin amfani da azurfa azaman kayan lantarki tare da ingantaccen aiki, kuma wutar lantarki ta azurfa an nuna ta rage asarar injin microwave zuwa 82% idan aka kwatanta da lantarki lantarki da ake amfani da shi sosai.

FIG. 1 LTOI electro-optic modulator tsarin, tsarin daidaitaccen lokaci, gwajin asarar lantarki na microwave.

FIG. 2 yana nuna na'urar gwaji da sakamakon LTOI electro-optic modulator dontsanani modulatedGane kai tsaye (IMDD) a cikin tsarin sadarwa na gani. Gwaje-gwajen sun nuna cewa LTOI electro-optic modulator na iya watsa siginar PAM8 a ƙimar alamar 176 GBd tare da ma'aunin BER na 3.8 × 10⁻² ƙasa da 25% SD-FEC madaidaicin. Don duka 200 GBd PAM4 da 208 GBd PAM2, BER ya yi ƙasa sosai fiye da madaidaicin 15% SD-FEC da 7% HD-FEC. Sakamakon gwajin ido da histogram a cikin Hoto na 3 na gani suna nuna cewa ana iya amfani da na'urar lantarki ta LTOI a cikin tsarin sadarwa mai sauri tare da babban layi da ƙananan kuskuren bit.

FIG. 2 Gwaji ta amfani da LTOI electro-optic modulator donAn daidaita ƙarfiGano kai tsaye (IMDD) a cikin tsarin sadarwa na gani (a) na'urar gwaji; (b) Ƙimar kuskuren da aka auna (BER) na PAM8 (ja), PAM4 (kore) da PAM2 (blue) sigina a matsayin aikin ƙimar alamar; (c) Ƙimar bayanin da za a iya amfani da shi da aka fitar (AIR, layin da aka dage) da ƙimar bayanan yanar gizo mai alaƙa (NDR, tsayayyen layi) don ma'auni tare da ƙimar ƙimar bit-kuskure ƙasa da 25% SD-FEC iyaka; (d) Taswirorin ido da ƙididdigar ƙididdiga a ƙarƙashin tsarin PAM2, PAM4, PAM8.

Wannan aikin yana nuna farkon LTOI mai haɓakawa na electro-optic modulator tare da bandwidth 3 dB na 110 GHz. A cikin ƙarfin juzu'i na gwajin watsawa na IMDD kai tsaye, na'urar ta cimma ƙimar ƙimar mai ɗaukar kaya guda ɗaya na 405 Gbit/s, wanda yayi daidai da mafi kyawun aikin dandamali na kayan gani na lantarki kamar LNOI da masu daidaita plasma. A nan gaba, yin amfani da ƙarin hadaddunIQ modulatorƙira ko ƙarin dabarun gyara kuskuren sigina na ci gaba, ko yin amfani da ƙananan abubuwan asarar microwave kamar su ma'auni, na'urorin lithium tantalate ana tsammanin cimma ƙimar sadarwa na 2 Tbit/s ko sama. Haɗe tare da takamaiman fa'idodin LTOI, kamar ƙananan birefringence da tasirin sikelin saboda aikace-aikacen sa mai yaduwa a cikin sauran kasuwannin tacewa na RF, fasahar lithium tantalate photonics za ta samar da ƙarancin farashi, ƙarancin ƙarfi da matsakaicin matsakaicin matsakaici don babban ƙarni na gaba. -Speed ​​Tantancewar sadarwa cibiyoyin sadarwa da microwave photonics tsarin.