Photon guda ɗaya InGaAs mai daukar hoto

Photon guda ɗayaInGaAs mai daukar hoto

Tare da saurin ci gaban LiDAR, dagano haskefasaha da kewayon fasahar da ake amfani da su don fasahar sa ido kan abin hawa ta atomatik kuma suna da buƙatu mafi girma, azanci da ƙudurin lokaci na mai gano abin da aka yi amfani da shi a cikin fasahar gano ƙananan haske na gargajiya ba zai iya biyan ainihin buƙatu ba. Photon guda ɗaya shine mafi ƙarancin ƙarfin ƙarfin haske, kuma mai ganowa tare da ikon gano photon guda ɗaya shine kayan aiki na ƙarshe na gano ƙarancin haske. Idan aka kwatanta da InGaAsAPD photodetector, Masu gano hoto guda ɗaya bisa InGaAs APD photodetector suna da saurin amsawa, hankali da inganci. Saboda haka, an gudanar da jerin bincike akan IN-GAAS APD photon detectors guda ɗaya a gida da waje.

Masu bincike daga Jami'ar Milan da ke Italiya sun fara haɓaka wani tsari mai nau'i biyu don kwaikwayi halin wucin gadi na photon guda ɗaya.dusar ƙanƙara mai daukar hotoa cikin 1997, kuma ya ba da sakamakon siminti na lambobi na halayen wucin gadi na photon avalanche photodetector guda ɗaya. Sannan a cikin 2006, masu binciken sun yi amfani da MOCVD don shirya tsarin geometricInGaAs APD mai daukar hotoMai gano photon guda ɗaya, wanda ya ƙaru ingancin gano hoto guda ɗaya zuwa kashi 10% ta hanyar rage ma'aunin haske da haɓaka filin lantarki a mahaɗan daban-daban. A cikin 2014, ta ƙara haɓaka yanayin watsawar zinc da haɓaka tsari na tsaye, mai gano hoto guda ɗaya yana da ingantaccen ganowa, har zuwa 30%, kuma ya sami jitter lokacin kusan 87ps. A cikin 2016, SANZARO M et al. hadedde da InGaAs APD photodetector mai gano hoto guda ɗaya tare da haɗaɗɗen resistor monolithic, ya ƙera ƙaramin ƙidayar hoto guda ɗaya dangane da na'urar ganowa, kuma ya ba da shawarar hanyar kashe gaɓoɓi wanda ya rage yawan cajin ƙanƙara, ta haka yana rage bugun bugun jini da tashe-tashen hankula, da rage lokacin jitter zuwa 70 ps. A lokaci guda kuma, wasu ƙungiyoyin bincike sun kuma gudanar da bincike akan InGaAs APDmai daukar hotodaya photon gane. Misali, Princeton Lightwave ya tsara InGaAs/InPAPD mai gano hoto guda ɗaya tare da tsarin tsari kuma ya sanya shi cikin amfani da kasuwanci. Cibiyar fasahar fasaha ta Shanghai ta gwada aikin hoto guda ɗaya na APD photodetector ta amfani da kau da adibas na zinc da yanayin bugun bugun ƙofa mai ƙarfi tare da ƙididdigar duhu na 3.6 × 10 ⁻⁻ / ns bugun jini a mitar bugun jini na 1.5 MHz. Joseph P et al. An tsara tsarin mesa InGaAs APD mai gano hoto guda ɗaya tare da babban bandgap, kuma an yi amfani da InGaAsP azaman abin rufe fuska don samun ƙananan ƙididdiga mai duhu ba tare da tasiri ga iyawar ganowa ba.

Yanayin aiki na InGaAs APD mai gano hoto guda ɗaya shine yanayin aiki kyauta, wato, APD photodetector yana buƙatar kashe da'irar bayan dusar ƙanƙara, kuma ta warke bayan kashewa na ɗan lokaci. Domin rage tasirin quenching jinkiri lokaci, shi ne wajen kasu kashi biyu iri: Daya shi ne don amfani da m ko aiki quenching kewaye don cimma quenching, kamar aiki quenching kewaye amfani da R Thew, da dai sauransu Figure (a), (b) shi ne wani Saukake zane na lantarki iko da kuma aiki quenching kewaye da aiki da aka ɓullo da a matsayin APDde ko rage gudu da yanayin da aka ɓullo da shi a cikin yanayin da aka ɓullo da shi a matsayin APDde. Matsalolin bugun bugun jini da ba a gano a baya ba. Haka kuma, ingantaccen ganowa a 1550 nm shine 10%, kuma yuwuwar bugun bugun jini ya ragu zuwa ƙasa da 1%. Na biyu shine fahimtar saurin kashewa da murmurewa ta hanyar sarrafa matakin ƙarfin lantarki. Tunda ba ya dogara da sarrafa martanin bugun jini na dusar ƙanƙara ba, lokacin jinkirin kashewa yana raguwa sosai kuma an inganta ingantaccen gano mai ganowa. Misali, LC Comandar et al suna amfani da yanayin gated. An shirya na'urar gano hoto guda ɗaya bisa InGaAs/InPAPD. Ingancin gano hoton hoto ɗaya ya wuce 55% a 1550 nm, kuma an samu yuwuwar bugun bugun jini na 7%. A kan haka, Jami'ar Kimiyya da Fasaha ta kasar Sin ta kafa tsarin liDAR ta hanyar amfani da fiber-mode fiber lokaci guda tare da na'urar gano hoto guda daya ta InGaAs APD kyauta. Ana nuna kayan aikin gwaji a cikin Hoto (c) da (d), kuma gano gajimare masu yawa tare da tsayin kilomita 12 an gane su tare da ƙudurin lokaci na 1 s da sararin samaniya na 15 m.