Chimodzi mwazinthu zofunika kwambiri za optical modulator ndi liwiro lake losinthira kapena bandwidth, yomwe imayenera kukhala yothamanga kwambiri monga zamagetsi zomwe zilipo. Ma transistors okhala ndi ma frequency opitilira 100 GHz awonetsedwa kale muukadaulo wa silicon wa 90 nm, ndipo liwiro lidzachulukirachulukira chifukwa kukula kwake kumachepetsedwa [1]. Komabe, bandwidth ya ma modulator amasiku ano a silicon ndi ochepa. Silicon ilibe χ(2) -yosagwirizana chifukwa cha mawonekedwe ake a centro-symmetric crystalline. Kugwiritsiridwa ntchito kwa silicon yowonongeka kwadzetsa zotsatira zosangalatsa kale [2], koma zosagwirizana nazo sizimalola zida zothandiza. Ma silicon photonic modulators a state-of-the art amadalirabe kubalalitsidwa kwaufulu mu pn kapena pin junctions [3-5]. Kupita patsogolo kokondera kwawonetsedwa kuti kukuwonetsa kutalika kwa voliyumu yotsika ngati VπL = 0.36 V mm, koma liwiro la kusinthasintha limachepa ndi mphamvu za onyamula ochepa. Komabe, mitengo ya data ya 10 Gbit / s yapangidwa mothandizidwa ndi kutsindika koyambirira kwa chizindikiro chamagetsi [4]. Pogwiritsa ntchito njira zotsatsira m'malo mwake, bandwidth yawonjezeka kufika pafupifupi 30 GHz [5,6], koma kutalika kwa magetsi kunakwera mpaka VπL = 40 V mm. Tsoka ilo, ma plasma effect phase modulators amatulutsanso kusinthasintha kosafunikira [7], ndipo amayankha mosagwirizana ndi magetsi omwe amagwiritsidwa ntchito. Mawonekedwe apamwamba osinthika ngati QAM amafunikira, komabe, kuyankha kwa mzere komanso kusinthika koyenera, kupangitsa kugwiritsa ntchito mphamvu ya electro-optic (Pockels effect [8]) kukhala yofunika kwambiri.
2. Njira ya SOH
Posachedwapa, njira ya silicon-organic hybrid (SOH) yaperekedwa [9-12]. Chitsanzo cha SOH modulator chikuwonetsedwa mu Chithunzi 1 (a). Imakhala ndi slot waveguide yomwe imatsogolera gawo la kuwala, ndi mizere iwiri ya silicon yomwe imalumikiza magetsi optical waveguide ndi maelekitirodi azitsulo. Ma electrode ali kunja kwa gawo la optical modal kuti apewe kuwonongeka kwa kuwala [13], Mkuyu 1 (b). Chipangizocho chimakutidwa ndi ma electro-optic organic material omwe amadzaza mofanana polowera. Magetsi owongolera amanyamulidwa ndi zitsulo zamagetsi zamagetsi ndipo amatsika podutsa chifukwa cha zingwe za silicon. Mphamvu yamagetsi yomwe imachokera ndiye imasintha index of refraction mu slot kudzera mu Ultra-fast electro-optic effect. Popeza malowa ali ndi m'lifupi mwa dongosolo la 100 nm, ma volts ochepa ndi okwanira kupanga minda yamphamvu kwambiri yosinthira yomwe ili mu dongosolo la kukula kwa mphamvu ya dielectric ya zida zambiri. Kapangidwe kameneka kamakhala ndi kusinthasintha kwakukulu chifukwa minda yonse ya modulating ndi kuwala imayikidwa mkati mwa slot, Chithunzi 1 (b) [14]. Zowonadi, kukhazikitsidwa koyamba kwa ma SOH modulators okhala ndi sub-volt operation [11] awonetsedwa kale, ndipo kusintha kwa sinusoidal mpaka 40 GHz kunawonetsedwa [15,16]. Komabe, chovuta pakupanga ma modulator otsika kwambiri a SOH othamanga kwambiri ndikupanga chingwe cholumikizira kwambiri. Mu dera lofanana ndi kagawo kakhoza kuyimiridwa ndi capacitor C ndi mizere conductive ndi resistors R, Mkuyu 1 (b). Nthawi yofananira ya RC nthawi zonse imatsimikizira bandwidth ya chipangizocho [10,14,17,18]. Kuti muchepetse kukana kwa R, adalangizidwa kuti achepetse zingwe za silicon [10,14]. Ngakhale kuti doping imawonjezera kusinthika kwazitsulo za silicon (ndipo motero kumawonjezera kutayika kwa kuwala), munthu amalipira chilango chowonjezereka chifukwa kusuntha kwa electron kumasokonekera chifukwa cha kubalalika konyansa [10,14,19]. Komanso, zoyeserera zaposachedwa kwambiri zopangira zidawonetsa mosayembekezereka kutsika kotsika.
Beijing Rofea Optoelectronics Co., Ltd. yomwe ili ku "Silicon Valley" ku China - Beijing Zhongguancun, ndi bizinesi yapamwamba kwambiri yodzipereka potumikira mabungwe ofufuza zapakhomo ndi akunja, mabungwe ofufuza, mayunivesite ndi ogwira ntchito kafukufuku wa sayansi. Kampani yathu imachita nawo kafukufuku wodziyimira pawokha ndi chitukuko, kapangidwe, kupanga, kugulitsa zinthu za optoelectronic, ndipo imapereka mayankho aluso ndi ntchito zamaluso, zotsogola za akatswiri ofufuza asayansi ndi akatswiri opanga mafakitale. Pambuyo pazaka zatsopano zodziyimira pawokha, zapanga mndandanda wolemera komanso wabwino kwambiri wazinthu zamagetsi, zomwe zimagwiritsidwa ntchito kwambiri m'matauni, asitikali, zoyendera, mphamvu zamagetsi, ndalama, maphunziro, zamankhwala ndi mafakitale ena.
Tikuyembekezera mgwirizano ndi inu!
Nthawi yotumiza: Mar-29-2023