Lithium tantalate (LTOI) high speed electro-optic modulator

Lithium tantalate (LTOI) kuthamanga kwambirielectro-optic modulator

Kuchuluka kwa data padziko lonse lapansi kukukulirakulirabe, motsogozedwa ndi kufalikira kwa matekinoloje atsopano monga 5G ndi intelligence yopangira (AI), yomwe imabweretsa zovuta zazikulu kwa ma transceivers pamagawo onse a ma network optical. Mwachindunji, teknoloji ya electro-optic modulator ya m'badwo wotsatira imafuna kuwonjezeka kwakukulu kwa mitengo yotumizira deta ku 200 Gbps mu njira imodzi pamene kuchepetsa kugwiritsa ntchito mphamvu ndi ndalama. M'zaka zingapo zapitazi, teknoloji ya silicon photonics yakhala ikugwiritsidwa ntchito kwambiri pamsika wa transceiver optical, makamaka chifukwa chakuti silicon photonics ikhoza kupangidwa mochuluka pogwiritsa ntchito njira yokhwima ya CMOS. Komabe, ma SOI electro-optic modulators omwe amadalira kubalalitsidwa kwa chonyamulira amakumana ndi zovuta zazikulu mu bandwidth, kugwiritsa ntchito mphamvu, kuyamwa kwa chonyamula chaulere komanso kusasinthika kosinthika. Njira zina zaukadaulo pamsika zikuphatikiza InP, filimu yopyapyala ya lithiamu niobate LNOI, ma polima a electro-optical, ndi njira zina zophatikizira zamapulatifomu osiyanasiyana. LNOI imatengedwa kuti ndi yankho lomwe lingathe kuchita bwino kwambiri pa liwiro lapamwamba kwambiri komanso kusinthasintha kwa mphamvu zochepa, komabe, pakali pano ili ndi zovuta zina zokhudzana ndi kupanga misala ndi mtengo wake. Posachedwapa, gulu anapezerapo filimu woonda lithiamu tantalate (LTOI) Integrated photonic nsanja ndi katundu kwambiri photoelectric ndi kupanga lalikulu, amene akuyembekezeka zigwirizane kapena kupitirira ntchito ya lifiyamu niobate ndi pakachitsulo kuwala nsanja mu ntchito zambiri. Komabe, mpaka pano, chipangizo chachikulu chakulumikizana kwamaso, Ultra-high speed electro-optic modulator, sichinatsimikizidwe mu LTOI.

Mu phunziro ili, ochita kafukufuku anayamba kupanga LTOI electro-optic modulator, mawonekedwe ake omwe akuwonetsedwa mu Chithunzi 1. Kupyolera mu mapangidwe a mapangidwe a lithiamu tantalate pa insulator ndi magawo a electrode ya microwave, kufalikira kwa liwiro la microwave ndi kuwala kwa mafunde muelectro-optical modulezimakwaniritsidwa. Pankhani yochepetsa kutayika kwa ma elekitirodi a microwave, ofufuza pa ntchitoyi kwa nthawi yoyamba adapereka lingaliro la kugwiritsa ntchito siliva ngati ma elekitirodi okhala ndi ma conductivity abwino, ndipo ma elekitirodi asiliva adawonetsedwa kuti amachepetsa kutaya kwa ma microwave mpaka 82% poyerekeza ndi electrode yagolide yomwe imagwiritsidwa ntchito kwambiri.

CHITH. 1 LTOI electro-optic module module, kapangidwe kofananira ndi gawo, mayeso otayika a electrode a microwave.

CHITH. 2 ikuwonetsa zida zoyesera ndi zotsatira za LTOI electro-optic modulator yamphamvu modulatedkuzindikira kwachindunji (IMDD) mumakina olumikizirana owoneka bwino. Zoyesererazi zikuwonetsa kuti LTOI electro-optic modulator imatha kutumiza ma sign a PAM8 pamlingo wa 176 GBd wokhala ndi BER yoyezedwa ya 3.8 × 10⁻² pansi pa 25% SD-FEC. Kwa 200 GBd PAM4 ndi 208 GBd PAM2, BER inali yotsika kwambiri kuposa 15% SD-FEC ndi 7% HD-FEC. Kuyesa kwa diso ndi histogram mu Chithunzi 3 kumawonetsa kuti LTOI electro-optic modulator ingagwiritsidwe ntchito pamakina olumikizirana othamanga kwambiri okhala ndi mzere wapamwamba komanso kulakwitsa pang'ono pang'ono.

CHITH. 2 Yesani kugwiritsa ntchito LTOI electro-optic modulator yaKulimba modulatedKuzindikira Mwachindunji (IMDD) mu optical communication system (a) chipangizo choyesera; (b) Chiwerengero cha zolakwika pang'ono (BER) cha PAM8 (chofiira), PAM4 (chobiriwira) ndi PAM2 (buluu) monga ntchito ya chizindikiro; (c) Chidziwitso chogwiritsidwa ntchito chogwiritsidwa ntchito (AIR, dashed line) ndi chiwerengero cha deta chogwirizana (NDR, mzere wolimba) pamiyeso yokhala ndi zolakwika zochepa zomwe zili pansi pa 25% SD-FEC malire; (d) Mamapu amaso ndi ma statistical histograms pansi pa PAM2, PAM4, PAM8 modulation.

Ntchitoyi ikuwonetsa modulator yoyamba yothamanga kwambiri ya LTOI electro-optic yokhala ndi 3 dB bandwidth ya 110 GHz. Pakuyesa kwamphamvu kuzindikirika molunjika kwa IMDD yoyeserera, chipangizochi chimakwaniritsa kuchuluka kwa data yonyamulira imodzi ya 405 Gbit/s, yomwe ikufanana ndi magwiridwe antchito a nsanja zomwe zilipo kale za electro-optical monga LNOI ndi plasma modulators. M'tsogolomu, pogwiritsa ntchito zovuta kwambiriIQ modulatormapangidwe kapena njira zowongolera zolakwika zamakina, kapena kugwiritsa ntchito magawo otsika a microwave otayika monga magawo a quartz, zida za lithiamu tantalate zikuyembekezeka kukwaniritsa kulumikizana kwa 2 Tbit / s kapena kupitilira apo. Kuphatikizidwa ndi zabwino zenizeni za LTOI, monga kutsika kwa birefringence ndi kukula kwake chifukwa cha kufalikira kwake m'misika ina ya RF, ukadaulo wa lithium tantalate Photonics upereka njira zotsika mtengo, zotsika mphamvu komanso zothamanga kwambiri pamawu am'badwo wotsatira othamanga kwambiri olumikizirana ndi makina ojambulira ma microwave.