Ɗaya daga cikin mahimman kaddarorin na'urar modulator shine saurin daidaitawa ko bandwidth, wanda yakamata ya zama aƙalla da sauri kamar na'urorin lantarki.Transistor da ke da mitocin wucewa sama da 100 GHz an riga an nuna su a cikin fasahar silicon 90 nm, kuma saurin zai ƙara ƙaruwa yayin da aka rage ƙaramin girman fasalin [1].Koyaya, bandwidth na masu haɓaka tushen silicon na yau yana iyakance.Silicon ba ya mallaki χ(2) -rashin kan layi saboda tsarin sa na centro-symmetric crystalline.Amfani da siliki mai tsauri ya haifar da sakamako mai ban sha'awa tuni [2], amma abubuwan da ba na layi ba har yanzu ba su ba da izinin na'urori masu amfani ba.Na'urorin zamani na silicon photonic modulators don haka har yanzu suna dogara ga watsawar jigilar kaya kyauta a cikin pn ko mahaɗar fil [3-5].An nuna mahaɗar son kai na gaba don nuna samfurin tsawon ƙarfin lantarki mai ƙarancin ƙarfi kamar VπL = 0.36 V mm, amma saurin daidaitawa yana iyakance ta ƙarfin ɗimbin dillalai.Har yanzu, an ƙirƙiri ƙimar bayanai na 10 Gbit/s tare da taimakon riga-kafi na siginar lantarki [4].Yin amfani da junction na son rai maimakon, bandwidth an ƙara zuwa kusan 30 GHz [5,6], amma tsawon ƙarfin ƙarfin samfurin ya tashi zuwa VπL = 40 V mm.Abin takaici, irin waɗannan masu daidaita yanayin tasirin plasma suna haifar da yanayin ƙarfin da ba a so suma [7], kuma suna amsawa ba tare da la'akari da ƙarfin lantarki da ake amfani da su ba.Siffofin haɓaka na haɓaka kamar QAM suna buƙatar, duk da haka, amsa ta madaidaiciya da tsantsar daidaitawar lokaci, yin amfani da tasirin electro-optic (tasirin Pockels [8]) musamman kyawawa.
2. Hanyar SOH
Kwanan nan, an ba da shawarar tsarin siliki-organic hybrid (SOH) [9-12].An nuna misalin mai sarrafa SOH a cikin siffa 1 (a).Ya ƙunshi ramin waveguide da ke jagorantar filin gani, da ɗigon siliki guda biyu waɗanda ke haɗa wutar lantarki ta hanyar lantarki zuwa na'urorin lantarki.Wutar lantarki suna waje da filin modal na gani don guje wa asarar gani [13], Hoto 1 (b).An lulluɓe na'urar tare da kayan halitta na lantarki-optic wanda ya cika ramin daidai gwargwado.Ƙarfe na lantarki yana ɗaukar wutar lantarki mai daidaitawa kuma yana faɗuwa a fadin ramin godiya ga ɗigon siliki.Sakamakon filin lantarki sannan ya canza fihirisar refraction a cikin ramin ta hanyar tasirin lantarki mai sauri.Tun da ramin yana da nisa a cikin tsari na 100 nm, ƴan volts sun isa don samar da filayen daidaitawa masu ƙarfi waɗanda ke cikin tsari na girman ƙarfin dielectric na yawancin kayan.Tsarin yana da babban ingancin daidaitawa tunda duka abubuwan daidaitawa da filayen gani sun fi mayar da hankali a cikin ramin, siffa 1 (b) [14].Lalle ne, an riga an nuna ayyukan farko na masu daidaitawa na SOH tare da aikin sub-volt [11], kuma an nuna tsarin sinusoidal har zuwa 40 GHz [15,16].Duk da haka, ƙalubalen gina ƙananan wutar lantarki mai sauri na SOH masu haɓakawa shine ƙirƙirar tsiri mai haɗawa sosai.A daidai da'irar ramin za a iya wakilta ta capacitor C da ratsan tafiyarwa ta resistors R, siffa 1(b).Daidaitaccen lokacin RC daidai yana ƙayyade bandwidth na na'urar [10,14,17,18].Don rage juriya R, an ba da shawarar yin amfani da igiyoyin silicon [10,14].Duk da yake doping yana ƙara haɓakar igiyoyin silicon (saboda haka yana ƙara hasara na gani), mutum yana biyan ƙarin hukumcin asara saboda motsin lantarki yana da lahani ta hanyar watsawa mai ƙazanta [10,14,19].Bugu da ƙari, yunƙurin ƙirƙira na baya-bayan nan ya nuna ƙarancin ƙarfin aiki ba zato ba tsammani.
Beijing Rofea Optoelectronics Co., Ltd. dake cikin "Silicon Valley" na kasar Sin - Beijing Zhongguancun, wani babban kamfani ne na fasaha da aka sadaukar don hidimar cibiyoyin bincike na gida da na waje, cibiyoyin bincike, jami'o'i da ma'aikatan binciken kimiyya na masana'antu.Kamfaninmu ya fi tsunduma cikin bincike mai zaman kansa da haɓakawa, ƙira, masana'antu, tallace-tallace na samfuran optoelectronic, kuma yana ba da sabbin hanyoyin warwarewa da ƙwararru, keɓaɓɓen sabis don masu binciken kimiyya da injiniyoyin masana'antu.Bayan shekaru masu tasowa masu zaman kansu, ya samar da samfurori masu kyau da cikakke na samfurori na photoelectric, waɗanda aka yi amfani da su sosai a cikin gundumomi, soja, sufuri, wutar lantarki, kudi, ilimi, likita da sauran masana'antu.
Muna fatan samun haɗin gwiwa tare da ku!
Lokacin aikawa: Maris 29-2023