photon guda ɗayana'urar gano hoto ta InGaAs
Tare da saurin haɓaka LiDAR,gano haskeFasaha da fasahar kewayawa da ake amfani da su don fasahar daukar hoton ababen hawa ta atomatik suma suna da buƙatu mafi girma, ƙarfin ganewa da ƙudurin lokaci na na'urar gano ƙananan haske da ake amfani da ita a fasahar gano ƙananan haske ta gargajiya ba za su iya biyan ainihin buƙatun ba. Na'urar gano ƙananan haske guda ɗaya ita ce mafi ƙarancin na'urar makamashi ta haske, kuma na'urar gano ƙananan haske guda ɗaya ita ce kayan aiki na ƙarshe na gano ƙananan haske. Idan aka kwatanta da InGaAsna'urar gano hoto ta APD, na'urorin gano hoto guda ɗaya bisa ga na'urar gano hoto ta InGaAs APD suna da saurin amsawa, hankali da inganci mafi girma. Saboda haka, an gudanar da jerin bincike kan na'urorin gano hoto guda ɗaya na IN-GAAS APD a gida da waje.
Masu bincike daga Jami'ar Milan da ke Italiya sun fara ƙirƙiro wani tsari mai girma biyu don kwaikwayon halayen ɗan lokaci na photon guda ɗayana'urar gano ambaliyar ruwaa shekarar 1997, kuma sun bayar da sakamakon kwaikwayon lambobi na halayen wucin gadi na na'urar gano zaftarewar dusar ƙanƙara ta photon guda ɗaya. Sannan a shekarar 2006, masu binciken sun yi amfani da MOCVD don shirya tsarin geometric mai siffar planar.Mai gano hoto na InGaAs APDna'urar gano photon guda ɗaya, wanda ya ƙara ingancin gano photon guda ɗaya zuwa kashi 10% ta hanyar rage layin haske da haɓaka filin lantarki a mahaɗin daban-daban. A cikin 2014, ta hanyar ƙara inganta yanayin yaɗuwar zinc da inganta tsarin tsaye, na'urar gano photon guda ɗaya tana da ingantaccen inganci na ganowa, har zuwa kashi 30%, kuma tana cimma jitter na lokaci na kimanin ps 87. A cikin 2016, SANZARO M et al. sun haɗa na'urar gano photon guda ɗaya ta InGaAs APD tare da resistor mai haɗakar monolithic, sun tsara ƙaramin tsarin ƙidaya photon guda ɗaya bisa ga na'urar ganowa, kuma sun gabatar da hanyar kashewa ta haɗaka wacce ta rage cajin zaftarewar ƙasa sosai, ta haka rage magana bayan bugun jini da na gani, da rage jitter na lokaci zuwa ps 70. A lokaci guda, sauran ƙungiyoyin bincike sun kuma gudanar da bincike kan InGaAs APDna'urar gano hotona'urar gano hoto guda ɗaya. Misali, Princeton Lightwave ta ƙera na'urar gano hoto guda ɗaya ta InGaAs/InPAPD tare da tsarin planar kuma ta yi amfani da shi don amfanin kasuwanci. Cibiyar Fasaha ta Shanghai ta gwada aikin na'urar gano hoto guda ɗaya ta APD ta amfani da cire ma'ajiyar zinc da yanayin bugun ƙofar da aka daidaita da ƙarfin capacitive tare da ƙidayar duhu ta 3.6 × 10 ⁻⁴/ns a mitar bugun jini ta 1.5 MHz. Joseph P da abokan aikinsa sun ƙera tsarin mesa na'urar gano hoto guda ɗaya ta InGaAs APD tare da faɗin bandgap, kuma sun yi amfani da InGaAsP a matsayin kayan da ke sha don samun ƙaramin adadin duhu ba tare da shafar ingancin ganowa ba.
Yanayin aiki na na'urar gano hoto ta InGaAs APD guda ɗaya yanayin aiki ne na kyauta, wato, na'urar gano hoto ta APD tana buƙatar kashe da'irar gefe bayan zaftarewar ƙasa ta faru, sannan ta murmure bayan ta kashe na ɗan lokaci. Domin rage tasirin lokacin jinkirin kashewa, an raba shi kusan zuwa nau'i biyu: Na farko shine amfani da da'irar kashewa mai aiki ko mara aiki don cimma kashewa, kamar da'irar kashewa mai aiki da R Thew ke amfani da ita, da sauransu. Hoto (a), (b) zane ne mai sauƙi na na'urar sarrafa lantarki da da'irar kashewa mai aiki da haɗinsa da na'urar gano hoto ta APD, wanda aka haɓaka don yin aiki a cikin yanayin gudu ko na gudu kyauta, wanda ya rage matsalar da ba a taɓa gani ba a baya bayan bugun jini. Bugu da ƙari, ingancin ganowa a 1550 nm shine 10%, kuma yuwuwar bayan bugun jini ya ragu zuwa ƙasa da 1%. Na biyu shine a cimma kashewa da murmurewa cikin sauri ta hanyar sarrafa matakin ƙarfin lantarki na bias. Tunda ba ya dogara da ikon sarrafa bugun zaftarewar ƙasa ba, lokacin jinkiri na kashewa yana raguwa sosai kuma ingancin gano na'urar ganowa ya inganta. Misali, LC Comandar da abokan aikinsa suna amfani da yanayin gated. An shirya na'urar gano na'urar gano na'urar daukar hoto guda ɗaya mai gated bisa ga InGaAs/InPAPD. Ingancin gano na'urar daukar hoto guda ɗaya ya wuce 55% a 1550 nm, kuma an cimma nasarar samun kashi 7% bayan bugun jini. A kan wannan tushe, Jami'ar Kimiyya da Fasaha ta China ta kafa tsarin liDAR ta amfani da zare mai yanayin da yawa a lokaci guda tare da na'urar gano na'urar daukar hoto guda ɗaya mai inGaAs APD mai yanayin da babu matsala. An nuna kayan aikin gwaji a Hoto na (c) da (d), kuma an gano gajimare masu layuka da yawa tare da tsayin kilomita 12 tare da ƙudurin lokaci na 1s da ƙudurin sarari na mita 15.
Lokacin Saƙo: Mayu-07-2024