Ifoton enyeInGaAs ifotodetector
Ngophuhliso olukhawulezayo lwe-LiDAR, iukubona ukukhanyaitekhnoloji kunye netekhnoloji yokusukela esetyenziselwa itekhnoloji yokujonga umkhondo wesithuthi esizenzekelayo nazo zineemfuno eziphezulu, ubuntununtunu kunye nesisombululo sexesha lomtshini osetyenziswa kubuchwepheshe bokubona ukukhanya okusezantsi akukwazi ukuhlangabezana neemfuno zokwenyani. I-photon enye iyona yunithi encinci yamandla yokukhanya, kwaye i-detector enekhono lokubona i-photon enye sisixhobo sokugqibela sokubona ukukhanya okuphantsi. Xa kuthelekiswa ne-InGaAsIsixhobo sokufota seAPD, i-single-photon detectors esekelwe kwi-InGaAs APD photodetector inesantya esiphezulu sokuphendula, uvakalelo kunye nokusebenza kakuhle. Ke ngoko, uthotho lophando kwi-IN-GAAS APD photodetector enye yeefoton zenziwa ekhaya naphesheya.
Abaphandi abavela kwiYunivesithi yaseMilan e-Italiya baqala ukwenza imodeli enamacala amabini ukulinganisa indlela yokuziphatha okwethutyana yefoton enye.i-avalanche photodetectorngo-1997, kwaye wanika iziphumo zokulinganisa amanani zeempawu ezidlulayo zefoton enye ye-avalanche photodetector. Emva koko kwi-2006, abaphandi basebenzisa i-MOCVD ukulungiselela i-geometric ecwangcisiweyoInGaAs APD photodetectori-photon detector enye, eyandisa ukufumanisa i-photon enye ye-photon kwi-10% ngokunciphisa umaleko obonakalisayo kunye nokuphucula indawo yombane kwi-interface ye-heterogeneous. Ngo-2014, ngokuphucula ngakumbi iimeko zokusasazwa kwe-zinc kunye nokuphucula isakhiwo esithe nkqo, umtshini we-photon-single unomsebenzi ophezulu wokubona, ukuya kuthi ga kwi-30%, kwaye ufezekise i-jitter yexesha malunga ne-87 ps. Kwi-2016, i-SANZARO M et al. idityaniswe i-InGaAs APD i-photodetector enye-photon detector ene-monolithic resistor edibeneyo, eyilwe imodyuli yokubala i-compact single-photon esekelwe kwi-detector, kwaye iphakamisa indlela yokucima i-hybrid eyanciphisa kakhulu intlawulo ye-avalanche, ngaloo ndlela inciphisa i-post-pulse kunye ne-optical crosstalk, kunye ukunciphisa ixesha jitter ukuya 70 ps. Kwangaxeshanye, amanye amaqela ophando nawo enze uphando kwi-InGaAs APDifotodetectorumtshini wefoton enye. Ngokomzekelo, i-Princeton Lightwave iye yaqulunqa i-InGaAs / InPAPD enye i-photon detector enesakhiwo esicwangcisiweyo kwaye siyifake kwintengiso. I-Shanghai Institute of Technical Physics ivavanye ukusebenza kwe-photon enye ye-APD photodetector usebenzisa ukususwa kweediphozithi ze-zinc kunye ne-capacitive balanced gate pulse mode kunye nokubala okumnyama kwe-3.6 × 10 ⁻⁴/ns i-pulse kwi-pulse frequency ye-1.5 MHz. UJoseph P et al. yenzelwe i-mesa i-InGaAs APD i-photodetector enye i-photon detector ene-bandgap ebanzi, kwaye yasebenzisa i-InGaAsP njengesixhobo esifunxayo somaleko ukufumana ukubala okumnyama okuphantsi ngaphandle kokuchaphazela ukusebenza kakuhle kobhaqo.
Imowudi yokusebenza ye-InGaAs APD i-photodetector enye i-photon detector yimodi yokusebenza yamahhala, oko kukuthi, i-photodetector ye-APD idinga ukucima i-peripheral circuit emva kokuba i-avalanche yenzeke, kwaye ibuyele emva kokucima ixesha elithile. Ukuze kuncitshiswe impembelelo yexesha lokulibaziseka kokucima, likwahlulwe ngokulinganayo kwiindidi ezimbini: Enye kukusebenzisa i-passive okanye i-circuit quenching circuit ukuphumeza ukucima, njenge-circuit quenching esebenzayo esetyenziswa yi-R Thew, njl. Umzobo (a) , (b) ngumzobo olula wolawulo lwe-elektroniki kunye nesekethe yokucima esebenzayo kunye nokudibanisa kwayo kunye ne-APD photodetector, eye yaphuhliswa ukuba isebenze kwi-gate okanye imodi yokugijima yamahhala, ukunciphisa kakhulu ingxaki ye-post-pulse engazange ibonwe ngaphambili. Ngaphezu koko, ukufumanisa ukusebenza kakuhle kwi-1550 nm yi-10%, kwaye amathuba okuba i-post-pulse iyancipha ibe ngaphantsi kwe-1%. Okwesibini kukuqonda ukucima ngokukhawuleza kunye nokubuyisela ngokulawula inqanaba lombane we-bias. Ekubeni ayixhomekeke kulawulo lwempendulo ye-avalanche pulse, ixesha lokulibaziseka lokucima liyancipha kakhulu kwaye ukufumanisa ukusebenza kakuhle komtshina kuphuculwe. Umzekelo, LC Comandar et al sebenzisa imowudi yesango. Isixhobo sokujonga ifotoni enye esekwe kwi-InGaAs/InPAPD salungiswa. Ukusebenza kwe-photon enye ye-photon kwakungaphezulu kwe-55% kwi-1550 nm, kwaye i-post-pulse probability ye-7% ifunyenwe. Ngesi siseko, iYunivesithi yeSayensi kunye neTeknoloji yaseChina yaseka inkqubo ye-liDAR isebenzisa i-fiber ye-multi-mode ngaxeshanye idityaniswe ne-InGaAs ye-APD ye-photodetector ye-photon detector enye. Izixhobo zokulinga ziboniswa kuMzobo (c) kunye (d), kunye nokufunyanwa kwamafu amaninzi ane-multi-layer kunye nobude be-12 km kuqondwa kunye nesisombululo sexesha le-1 kunye nesisombululo sendawo ye-15 m.
Ixesha lokuposa: May-07-2024