Ibikoresho bito cyane bya lithium tantalate (LTOI) bigenda bigaragara nkimbaraga nshya zikomeye murwego rwa optique. Muri uyu mwaka, hasohotse imirimo myinshi yo mu rwego rwo hejuru kuri modulator ya LTOI, hamwe na wafer nziza ya LTOI yatanzwe na Porofeseri Xin Ou wo mu kigo cya Shanghai Institute of Microsystem and Technology Technology, hamwe n’uburyo bwo mu rwego rwo hejuru bwo gutunganya umurongo wateguwe n’itsinda rya Porofeseri Kippenberg muri EPFL , Ubusuwisi. Imbaraga zabo zifatanije zagaragaje ibisubizo bitangaje. Byongeye kandi, amatsinda y’ubushakashatsi yaturutse muri kaminuza ya Zhejiang ayobowe na Porofeseri Liu Liu na kaminuza ya Harvard iyobowe na Porofeseri Loncar na bo batanze raporo ku modoka yihuta ya LTOI.
Nkumuvandimwe wa hafi wa lithium niobate yoroheje (LNOI), LTOI igumana modulasi yihuta cyane hamwe nigihombo gito kiranga lithium niobate mugihe nayo itanga inyungu nkigiciro gito, birefringence nkeya, kandi bigabanya ingaruka zifotora. Kugereranya ibintu nyamukuru biranga ibyo bikoresho byerekanwe hano hepfo.
◆ Isano iri hagati ya Litiyumu Tantalate (LTOI) na Litiyumu Niobate (LNOI)
①Ironderero:2.12 vs 2.21
Ibi bishatse kuvuga ko ibipimo bimwe-byerekana umurongo, umurongo wa radiyo, hamwe nubunini busanzwe bwibikoresho bishingiye kubintu byombi birasa cyane, kandi imikorere ya fibre yo guhuza nayo iragereranywa. Hamwe nogukora neza, ibikoresho byombi birashobora kugera kubihombo byo gushiramo<0.1 dB / cm. EPFL ivuga ko igihombo cya 5.6 dB / m.
②Coefficient ya electro-optique:30.5 pm / V vs 30.9 pm / V.
Guhindura imikorere biragereranywa kubikoresho byombi, hamwe na modulisiyo ishingiye ku ngaruka ya Pockels, itanga umurongo mwinshi. Kugeza ubu, modulator ya LTOI irashobora kugera kuri 400G kumurongo umwe, hamwe numuyoboro urenga 110 GHz.
③Bandgap:3.93 eV vs 3.78 eV
Ibikoresho byombi bifite idirishya ryagutse, rishyigikira porogaramu kuva igaragara kugeza kuri infragre yumurambararo, nta kwinjiza mumirongo yitumanaho.
④Icyiciro cya kabiri-Coefficient idafite umurongo (d33):21 pm / V vs 27 pm / V.
Niba ikoreshwa kumurongo udafite umurongo nkibisekuru bya kabiri bihuza (SHG), itandukaniro-inshuro nyinshi (DFG), cyangwa igiteranyo cyinshi (SFG), imikorere yo guhindura ibikoresho byombi igomba kuba imwe.
Ibyiza bya LTOI vs LNOI
①Igiciro cyo Gutegura Wafer
LNOI isaba He ion gushiramo gutandukanya ibice, bifite ubushobozi buke bwa ionisation. Ibinyuranye, LTOI ikoresha H ion gushiramo gutandukana, bisa na SOI, hamwe no gusiba inshuro zirenga 10 kurenza LNOI. Ibi bivamo itandukaniro rikomeye ryibiciro kuri waferi ya santimetero 6: $ 300 na $ 2000, kugabanya ibiciro 85%.
②Isanzwe ikoreshwa cyane mumasoko ya elegitoroniki yumuguzi ya acoustic filter(750.000 buri mwaka, ikoreshwa na Samsung, Apple, Sony, nibindi).
Ibyiza bya LTOI vs LNOI
①Inenge Nibintu Bike, Ingaruka Zifotora Zifite intege nke, Ihamye
Ku ikubitiro, modulator ya LNOI yakunze kwerekana kubogama kubogamye, cyane cyane kubera kwirundanya kwishyurwa biterwa nubusembwa kuri interineti ya waveguide. Niba itavuwe, ibyo bikoresho birashobora gufata umunsi umwe kugirango bihamye. Nyamara, uburyo butandukanye bwateguwe kugirango iki kibazo gikemuke, nko gukoresha ibyuma bya okiside yometseho ibyuma, substrate polarisation, hamwe na annealing, bigatuma iki kibazo gikemurwa cyane ubu.
Ibinyuranye, LTOI ifite inenge nkeya yibintu, biganisha kugabanuka cyane. Ndetse hatabayeho gutunganyirizwa hamwe, aho ikorera iguma ihagaze neza. Ibisubizo nkibi byatangajwe na EPFL, Harvard, na kaminuza ya Zhejiang. Ariko, kugereranya akenshi bikoresha modulator ya LNOI itavuwe, ishobora kuba idakwiye rwose; hamwe no gutunganya, imikorere yibikoresho byombi birashoboka. Itandukaniro nyamukuru riri muri LTOI bisaba intambwe nkeya yinyongera yo gutunganya.
②Birefringence yo hepfo: 0.004 vs 0.07
Kurenza birefringence ya lithium niobate (LNOI) irashobora kuba ingorabahizi mugihe kimwe, cyane cyane ko kugoreka umurongo bishobora gutera uburyo bwo guhuza hamwe no kuvanga uburyo. Muri LNOI yoroheje, igoramye muri waveguide irashobora guhindura igice urumuri rwa TE mumucyo wa TM, bikagorana guhimba ibikoresho bimwe na bimwe byoroshye, nkayunguruzo.
Hamwe na LTOI, birefringence yo hepfo ikuraho iki kibazo, birashoboka ko byoroha guteza imbere ibikoresho-byimikorere byoroshye. EPFL yatangaje kandi ibisubizo bigaragara, ikoresha LTOI yo hasi ya birefringence no kutagira uburyo bwo kwambuka kugirango igere kuri ultra-rugari-nini ya electro-optique yumurongo wa tombora hamwe no kugenzura ikwirakwizwa ryinshi. Ibi byavuyemo umurongo wa nm 450 utangaje hamwe numurongo urenga 2000 wikurikiranya, inshuro nyinshi kurenza ibishobora kugerwaho na lithium niobate. Ugereranije na Kerr optique yinshyi, ibimashini bya electro-optique bitanga ibyiza byo kutarenga imbibi kandi bihamye, nubwo bisaba imbaraga za microwave yinjiza.
③Hejuru ya Optical Yangiritse
Ibyangiritse byangiritse kuri LTOI byikubye kabiri ibya LNOI, bitanga akarusho mubisabwa bitari umurongo (kandi birashoboka ko Coherent Perfect Absorption (CPO) izaza). Urwego rwa optique module imbaraga urwego ntirushobora kwangiza lithium niobate.
④Ingaruka Raman
Ibi kandi bijyanye na porogaramu idafite umurongo. Litiyumu niobate ifite ingaruka zikomeye za Raman, muri Kerr optique yumurongo wibikoresho bishobora kuganisha kumurabyo wa Raman udashaka kandi ukunguka amarushanwa, ukabuza x-gukata lithium niobate optique yumuriro utagera muri leta ya soliton. Hamwe na LTOI, ingaruka za Raman zirashobora guhagarikwa hifashishijwe igishushanyo mbonera cya kristu, bigatuma x-ikata LTOI kugirango igere kuri soliton optique yumubyimba. Ibi bifasha monolithic guhuza soliton optique yumurongo wa comb hamwe na modulator yihuta cyane, igikorwa ntigishobora kugerwaho na LNOI.
◆ Kuki Litiyumu Ntoya (LTOI) itavuzwe mbere?
Litiyumu tantalate ifite ubushyuhe bwa Curie munsi ya lithium niobate (610 ° C na 1157 ° C). Mbere yo guteza imbere ikoranabuhanga rya heterointegration (XOI), modulator ya lithium niobate yakozwe hifashishijwe ikwirakwizwa rya titanium, risaba annealing hejuru ya 1000 ° C, bigatuma LTOI idakwiye. Nyamara, hamwe nuyu munsi uhinduranya ukoresheje insuliranteri ya insulator hamwe na waveguide yogushiraho modulator, ubushyuhe bwa 610 ° C Curie burenze bihagije.
◆ Ese Thin-Film Litiyumu Tantalate (LTOI) izasimbuza Thin-Film Litiyumu Niobate (TFLN)?
Ukurikije ubushakashatsi buriho, LTOI itanga inyungu mubikorwa byoroheje, gutuza, hamwe nigiciro kinini cyumusaruro, nta nkomyi igaragara. Ariko, LTOI ntabwo irenga lithium niobate mubikorwa byo guhindura, kandi ibibazo byumutekano hamwe na LNOI bizwi ibisubizo. Ku itumanaho DR modules, harakenewe bike kubintu byoroshye (na nitride ya silicon irashobora gukoreshwa mugihe bikenewe). Byongeye kandi, ishoramari rishya rirasabwa kongera gushyiraho uburyo bwo gutondeka urwego rwa wafer, tekinike ya heterointegration, hamwe no gupima kwizerwa (ingorane zo guterwa na lithium niobate ntabwo yari umurongo wogukurikirana ahubwo wagera kumusaruro mwinshi wafer). Kubwibyo, kugirango uhangane na lithium niobate imyanya yashizweho, LTOI irashobora gukenera kuvumbura izindi nyungu. Mu myigire, ariko, LTOI itanga imbaraga zingenzi zubushakashatsi kuri sisitemu ihuriweho na chip, nka octave-spanning electro-optic ibimamara, PPLT, soliton na AWG ibikoresho bigabanya umurongo, hamwe na modulator.
Igihe cyo kohereza: Ugushyingo-08-2024