Kwatanta tsarin kayan haɗaɗɗiyar hoto

Kwatanta tsarin kayan haɗaɗɗiyar hoto
Hoto 1 yana nuna kwatankwacin tsarin abu biyu, indium Phosphorus (InP) da silicon (Si). Rashin ƙarancin indium yana sa InP ya zama abu mafi tsada fiye da Si. Saboda da'irori na tushen silicon sun ƙunshi ƙarancin haɓakar epitaxial, yawan amfanin da'irori na tushen silicon yawanci ya fi na da'irori na InP. A cikin da'irori na tushen silicon, germanium (Ge), wanda yawanci ana amfani dashi kawaiMai daukar hoto(masu gano haske), yana buƙatar ci gaban epitaxial, yayin da a cikin tsarin InP, ko da madaidaicin raƙuman ruwa dole ne a shirya ta ci gaban epitaxial. Girman Epitaxial yana ƙoƙarin samun mafi girman lahani fiye da girma kristal guda ɗaya, kamar daga ingot crystal. InP waveguides suna da babban juzu'in juzu'i mai jujjuyawa kawai a cikin juzu'i, yayin da masu amfani da siliki suna da babban bambanci mai jujjuyawa a cikin duka masu jujjuyawa da tsayi, wanda ke ba da damar na'urorin tushen silicon don cimma ƙaramin lanƙwasa radis da sauran ƙarin ƙaƙƙarfan tsarin. InGaAsP yana da tazarar band kai tsaye, yayin da Si da Ge ba sa. A sakamakon haka, tsarin kayan kayan InP sun fi dacewa dangane da ingancin laser. Oxides na ciki na tsarin InP ba su da ƙarfi kuma ba su da ƙarfi kamar oxides na Si, silicon dioxide (SiO2). Silicon abu ne mai ƙarfi fiye da InP, yana ba da damar yin amfani da manyan wafer masu girma dabam, watau daga 300 mm (nan da nan za a haɓaka zuwa 450 mm) idan aka kwatanta da 75 mm a cikin InP. InPmasu daidaitawayawanci yana dogara ne akan tasirin Stark mai ƙididdigewa, wanda ke da zafin jiki saboda motsin bandeji da zafin jiki ya haifar. Sabanin haka, dogaro da zafin jiki na masu amfani da silikon yana da ƙanƙanta sosai.

Fasahar photonics na siliki ana ɗauka gabaɗaya ta dace da ƙarancin farashi, gajere, samfura masu girma (fiye da guda miliyan 1 a kowace shekara). Wannan saboda an yarda da shi sosai cewa ana buƙatar babban adadin ƙarfin wafer don yada abin rufe fuska da farashin haɓaka, da wancansilicon photonics fasaharyana da gagarumin rashin amfani a cikin yanki-da-birni da aikace-aikacen samfur na dogon lokaci. A gaskiya, duk da haka, akasin gaskiya ne. A cikin ƙananan farashi, gajeriyar kewayon, aikace-aikacen samar da albarkatu masu girma, Laser mai fitar da sarari a tsaye (VCSEL) dakai tsaye-modulated Laser (DML Laser: Laser wanda aka daidaita kai tsaye yana haifar da matsananciyar gasa, kuma raunin fasahar photonic na tushen silicon wanda ba zai iya haɗa laser ba cikin sauƙi ya zama babban hasara. Sabanin haka, a cikin metro, aikace-aikacen nesa mai nisa, saboda fifiko don haɗa fasahar photonics na silicon photonics da sarrafa siginar dijital (DSP) tare (wanda galibi ke cikin yanayin yanayin zafi), yana da fa'ida don raba laser. Bugu da kari, fasahar gano madaidaicin na iya daidaita gazawar fasahar siliki photonics zuwa babban matsayi, kamar matsalar cewa yanayin duhu ya fi karami fiye da na gida oscillator photocurrent. A lokaci guda kuma, ba daidai ba ne a yi tunanin cewa ana buƙatar babban adadin ƙarfin wafer don rufe abin rufe fuska da ƙimar haɓaka, saboda fasahar siliki photonics tana amfani da girman kumburi waɗanda suka fi girma fiye da na'urorin haɓaka ƙarfe oxide semiconductor (CMOS), don haka abin rufe fuska da ake buƙata da ayyukan samarwa ba su da arha.