Lithium tantalate (LTOI) modulator yamagetsi othamanga kwambiri

Lithium tantalate (LTOI) yothamanga kwambirimodulator yamagetsi

Kuchuluka kwa deta padziko lonse lapansi kukupitilira kukula, chifukwa cha kugwiritsa ntchito matekinoloje atsopano monga 5G ndi luntha lochita kupanga (AI), zomwe zimapangitsa kuti pakhale zovuta zazikulu kwa ma transceivers pamlingo uliwonse wa ma network a optical. Makamaka, ukadaulo wa electro-optic modulator wa m'badwo wotsatira umafuna kuwonjezeka kwakukulu kwa kuchuluka kwa kusamutsa deta kufika pa 200 Gbps mu njira imodzi pomwe kuchepetsa kugwiritsa ntchito mphamvu ndi ndalama. M'zaka zingapo zapitazi, ukadaulo wa silicon photonics wakhala ukugwiritsidwa ntchito kwambiri pamsika wa optical transceiver, makamaka chifukwa chakuti silicon photonics imatha kupangidwa mochuluka pogwiritsa ntchito njira ya CMOS yokhwima. Komabe, ma SOI electro-optic modulators omwe amadalira carrier dispersion amakumana ndi zovuta zazikulu mu bandwidth, kugwiritsa ntchito mphamvu, kuyamwa kwa carrier free ndi modulation nonlinearity. Njira zina zaukadaulo mumakampaniwa ndi monga InP, thin film lithium niobate LNOI, ma electro-optical polymers, ndi njira zina zophatikizira zambiri. LNOI imaonedwa kuti ndi yankho lomwe lingapeze magwiridwe antchito abwino kwambiri mu ultra-high speed ndi low power modulation, komabe, pakadali pano ili ndi zovuta zina pankhani ya kupanga zinthu zambiri komanso mtengo. Posachedwapa, gululi layambitsa nsanja yopyapyala ya lithiamu tantalate (LTOI) yolumikizidwa ndi photonic yokhala ndi mphamvu zabwino kwambiri zamagetsi komanso kupanga zinthu zazikulu, zomwe zikuyembekezeka kufanana kapena kupitirira magwiridwe antchito a nsanja za lithiamu niobate ndi silicon optical m'magwiritsidwe ambiri. Komabe, mpaka pano, chipangizo chachikulu chakulankhulana kwa kuwala, modulator ya electro-optic yothamanga kwambiri, sinatsimikizidwe mu LTOI.

Mu kafukufukuyu, ofufuzawo adapanga koyamba LTOI electro-optic modulator, yomwe kapangidwe kake kakuwonetsedwa pa Chithunzi 1. Kudzera mu kapangidwe ka kapangidwe ka gawo lililonse la lithiamu tantalate pa insulator ndi magawo a microwave electrode, kufananiza liwiro la kufalikira kwa microwave ndi mafunde owala mumodulator yamagetsi ndi kuwalazachitika. Ponena za kuchepetsa kutayika kwa ma electrode a microwave, ofufuza mu ntchitoyi kwa nthawi yoyamba adapereka lingaliro loti siliva agwiritsidwe ntchito ngati chinthu chopangira ma electrode chokhala ndi mphamvu yoyendetsera bwino, ndipo ma electrode asiliva adawonetsedwa kuti amachepetsa kutayika kwa ma microwave kufika pa 82% poyerekeza ndi ma electrode agolide omwe amagwiritsidwa ntchito kwambiri.

CHITHUNZI 1 Kapangidwe ka modulator ya LTOI electro-optic, kapangidwe kofananiza gawo, mayeso otayika a electrode ya microwave.

Chithunzi 2 chikuwonetsa chipangizo choyesera ndi zotsatira za modulator ya LTOI electro-optic yamphamvu yosinthidwaKuzindikira mwachindunji (IMDD) mu machitidwe olumikizirana ndi kuwala. Kuyeseraku kukuwonetsa kuti LTOI electro-optic modulator imatha kutumiza zizindikiro za PAM8 pamlingo wa chizindikiro cha 176 GBd ndi BER yoyezedwa ya 3.8×10⁻² pansi pa 25% SD-FEC threshold. Pa 200 GBd PAM4 ndi 208 GBd PAM2, BER inali yotsika kwambiri kuposa threshold ya 15% SD-FEC ndi 7% HD-FEC. Zotsatira za mayeso a maso ndi histogram mu Chithunzi 3 zikuwonetsa bwino kuti LTOI electro-optic modulator ingagwiritsidwe ntchito mu machitidwe olumikizirana othamanga kwambiri okhala ndi linearity yayikulu komanso low bit error rate.

CHITHUNZI 2 Kuyesera pogwiritsa ntchito LTOI electro-optic modulator yaMphamvu yosinthidwaKuzindikira Mwachindunji (IMDD) mu makina olumikizirana ndi kuwala (a) chipangizo choyesera; (b) Kuchuluka kwa zolakwika za bit (BER) za zizindikiro za PAM8 (zofiira), PAM4 (zobiriwira) ndi PAM2 (zabuluu) monga momwe zimagwiritsidwira ntchito ndi kuchuluka kwa zizindikiro; (c) Kuchuluka kwa chidziwitso chogwiritsidwa ntchito (AIR, mzere wodulidwa) ndi kuchuluka kwa deta yogwirizana (NDR, mzere wolimba) pamiyeso yokhala ndi kuchuluka kwa zolakwika za bit pansi pa malire a 25% SD-FEC; (d) Mamapu a maso ndi ma histogram a ziwerengero pansi pa PAM2, PAM4, PAM8 modulation.

Ntchitoyi ikuwonetsa modulator yoyamba ya LTOI electro-optic modulator yothamanga kwambiri yokhala ndi bandwidth ya 3 dB ya 110 GHz. Mu kuyesa kwa IMDD transmission kwa intensity modulation, chipangizochi chimapeza kuchuluka kwa deta ya carrier imodzi ya 405 Gbit/s, komwe kuli kofanana ndi magwiridwe antchito abwino kwambiri a nsanja za electro-optical zomwe zilipo monga LNOI ndi plasma modulators. M'tsogolomu, pogwiritsa ntchito zovuta kwambiri.Chowongolera cha IQmapangidwe kapena njira zamakono zowongolera zolakwika za chizindikiro, kapena kugwiritsa ntchito zinthu zotsika mtengo zotayika mu microwave monga zinthu zotsika mtengo za quartz, zida za lithiamu tantalate zikuyembekezeka kufika pamlingo wolumikizirana wa 2 Tbit/s kapena kupitirira apo. Kuphatikiza ndi zabwino za LTOI, monga kuchepa kwa birefringence ndi kuchuluka kwa mphamvu chifukwa cha kugwiritsidwa ntchito kwake m'misika ina ya RF filter, ukadaulo wa lithiamu tantalate photonics upereka njira zotsika mtengo, zamphamvu zochepa komanso zothamanga kwambiri zamaukonde olumikizirana othamanga kwambiri komanso machitidwe a microwave photonics.