Isantya esiphezulu seLithium tantalate (LTOI)i-electro-optic modulator
Ithrafikhi yedatha yehlabathi iyaqhubeka nokukhula, iqhutywa kukwamkelwa ngokubanzi kwezobuchwepheshe obutsha ezifana ne-5G kunye ne-artificial intelligence (AI), nto leyo ebangela imingeni ebalulekileyo kwii-transceivers kuwo onke amanqanaba eenethiwekhi ze-optical. Ngokukodwa, iteknoloji ye-electro-optic modulator yesizukulwana esilandelayo ifuna ukonyuka okukhulu kwamazinga okudluliselwa kwedatha ukuya kwi-200 Gbps kwitshaneli enye ngelixa kunciphisa ukusetyenziswa kwamandla kunye neendleko. Kwiminyaka embalwa edlulileyo, iteknoloji ye-silicon photonics isetyenziswa kakhulu kwimarike ye-transceiver ye-optical, ikakhulu ngenxa yokuba ii-silicon photonics zinokuveliswa ngobuninzi kusetyenziswa inkqubo ye-CMOS evuthiweyo. Nangona kunjalo, ii-modulators ze-SOI electro-optic ezixhomekeke kwi-carrier dispersion zijongene nemingeni emikhulu kwi-bandwidth, ukusetyenziswa kwamandla, ukufunxwa kwe-carrier ekhululekileyo kunye ne-modulation nonlinearity. Ezinye iindlela zobuchwepheshe kushishino ziquka i-InP, i-thin film lithium niobate LNOI, ii-polymers ze-electro-optical, kunye nezinye izisombululo zokudibanisa ezininzi ezahlukeneyo. I-LNOI ithathwa njengesisombululo esinokufezekisa ukusebenza okungcono kakhulu kwi-ultra-high speed kunye ne-low power modulation, nangona kunjalo, okwangoku inemingeni ethile ngokwenkqubo yemveliso yobuninzi kunye neendleko. Kutshanje, iqela liqalise iqonga le-photonic elihlanganisiweyo le-lithium tantalate (LTOI) elineempawu ezintle kakhulu ze-photoelectric kunye nemveliso enkulu, ekulindeleke ukuba ilingane okanye idlule ukusebenza kwamaqonga e-lithium niobate kunye ne-silicon optical kwizicelo ezininzi. Nangona kunjalo, kude kube ngoku, isixhobo esiphambili seunxibelelwano lwe-optical, i-electro-optic modulator enesantya esiphezulu kakhulu, ayikaqinisekiswa kwi-LTOI.
Kolu phononongo, abaphandi baqale bayila i-LTOI electro-optic modulator, isakhiwo sayo siboniswe kuMfanekiso 1. Ngokuyila isakhiwo somaleko ngamnye we-lithium tantalate kwi-insulator kunye neeparameter ze-microwave electrode, ukuhambelana kwesantya sokusasazeka kwe-microwave kunye ne-light wave kwii-modulator ye-electro-opticalNgokuphathelele ekunciphiseni ukulahleka kwe-electrode ye-microwave, abaphandi kulo msebenzi okokuqala bacebise ukusetyenziswa kwesilivere njengesixhobo se-electrode esine-conductivity engcono, kwaye i-electrode yesilivere ibonakalisiwe ukuba inciphisa ukulahleka kwe-microwave ukuya kwi-82% xa kuthelekiswa ne-electrode yegolide esetyenziswa kakhulu.
UMZOBO 1 Ulwakhiwo lwe-LTOI electro-optic modulator, uyilo lokulinganisa izigaba, uvavanyo lokulahleka kwe-electrode ye-microwave.
UMZOBO 2 ubonisa isixhobo sovavanyo kunye neziphumo ze-LTOI electro-optic modulator yeubunzulu obuhlengahlengisiweyoukufunyanwa ngqo (IMDD) kwiinkqubo zonxibelelwano lwe-optical. Olu vavanyo lubonisa ukuba i-LTOI electro-optic modulator inokudlulisa imiqondiso ye-PAM8 ngesantya sesibonakaliso se-176 GBd kunye ne-BER elinganisiweyo ye-3.8×10⁻² ngaphantsi komda we-25% SD-FEC. Kuzo zombini i-200 GBd PAM4 kunye ne-208 GBd PAM2, i-BER yayiphantsi kakhulu kunomda we-15% SD-FEC kunye ne-7% HD-FEC. Iziphumo zovavanyo lweliso kunye ne-histogram kuMfanekiso 3 zibonisa ngokubonakalayo ukuba i-LTOI electro-optic modulator ingasetyenziswa kwiinkqubo zonxibelelwano ezikhawulezayo ezine-linearity ephezulu kunye ne-bit error rate ephantsi.
UMZOBO 2 Uvavanyo olusebenzisa i-LTOI electro-optic modulatorUbungakanani bokujiya buhlengahlengisiweUkufunyanwa ngqo (IMDD) kwinkqubo yonxibelelwano lwe-optical (a) isixhobo sovavanyo; (b) Izinga lempazamo yebhithi elinganisiweyo (BER) yemiqondiso ye-PAM8 (ebomvu), i-PAM4 (eluhlaza) kunye ne-PAM2 (eluhlaza okwesibhakabhaka) njengomsebenzi wezinga lesibonakaliso; (c) Izinga lolwazi olusebenzisekayo olukhutshiweyo (i-AIR, umgca onamachaphaza) kunye nezinga ledatha elihambelanayo (i-NDR, umgca oqinileyo) wokulinganisa ngamaxabiso ezinga le-bit-error angaphantsi komda we-25% we-SD-FEC; (d) Iimephu zamehlo kunye nee-histogram zezibalo phantsi kwe-PAM2, PAM4, PAM8 modulation.
Lo msebenzi ubonisa i-modulator yokuqala ye-LTOI electro-optic yesantya esiphezulu ene-bandwidth ye-3 dB ye-110 GHz. Kwizilingo zokudluliselwa kwe-IMDD yokuvavanya i-intensity modulation, isixhobo sifikelela kwisantya sedatha ye-net yenkampani enye ye-405 Gbit/s, ethelekiswa nokusebenza kakuhle kwamaqonga e-electro-optical akhoyo afana ne-LNOI kunye nee-plasma modulators. Kwixesha elizayo, kusetyenziswa izinto ezintsonkothileyo ngakumbi.Umlungisi we-IQuyilo okanye iindlela zokulungisa iimpazamo zesignali eziphambili, okanye ukusebenzisa ii-substrates eziphantsi zokulahleka kwe-microwave ezifana nee-quartz substrates, izixhobo ze-lithium tantalate kulindeleke ukuba zifikelele kumazinga onxibelelwano e-2 Tbit/s okanye ngaphezulu. Zidibene neenzuzo ezithile ze-LTOI, ezifana ne-birefringence ephantsi kunye nesiphumo sesikali ngenxa yokusetyenziswa kwayo ngokubanzi kwezinye iimarike zesihluzi se-RF, itekhnoloji ye-lithium tantalate photonics iya kubonelela ngezisombululo ezingabizi kakhulu, ezinamandla aphantsi kunye nesantya esiphezulu kwiinethiwekhi zonxibelelwano lwe-optical olukhawulezayo lwesizukulwana esilandelayo kunye neenkqubo ze-microwave photonics.
Ixesha leposi: Disemba-11-2024