Isixhobo sokubona ifoto esinye se-InGaAs

Ifotoni enyeIsixhobo sokubona iifoto se-InGaAs

Ngophuhliso olukhawulezayo lweLiDAR,ukufunyanwa kokukhanyaItekhnoloji kunye netekhnoloji yokulinganisa esetyenziselwa itekhnoloji yokulandelela imifanekiso yezithuthi ngokuzenzekelayo nayo ineemfuno eziphezulu, uvakalelo kunye nesisombululo sexesha sesixhobo sokufumanisa esisetyenziswa kwitekhnoloji yendabuko yokufumanisa ukukhanya okuphantsi asinakuhlangabezana neemfuno zokwenyani. I-photon enye yeyona yunithi yamandla incinci yokukhanya, kwaye isixhobo sokufumanisa ukukhanya esinye sisixhobo sokugqibela sokufumanisa ukukhanya okuphantsi. Xa kuthelekiswa ne-InGaAsIsixhobo sokubona ifoto se-APD, ii-single-photon detector ezisekelwe kwi-InGaAs APD photodetector zinesantya esiphezulu sokuphendula, uvakalelo kunye nokusebenza kakuhle. Ke ngoko, uthotho lophando kwi-IN-GAAS APD photodetector single photon detector luye lwenziwa ekhaya nakwamanye amazwe.

Abaphandi kwiYunivesithi yaseMilan e-Itali baqale baphuhlisa imodeli enamacala amabini ukulinganisa indlela yokuziphatha ye-photon enye edlulayoisixhobo sokubona ifoto se-avalanchengo-1997, waza wanikela iziphumo zokulinganisa amanani zeempawu zexeshana zesixhobo esinye sokubona i-photon avalanche photodetector. Emva koko ngo-2006, abaphandi basebenzisa i-MOCVD ukulungiselela i-planar geometricIsixhobo sokubona iifoto se-InGaAs APDi-single photon detector, eyandisa ukusebenza kakuhle kokubona i-single-photon ukuya kwi-10% ngokunciphisa umaleko obonakalisayo kunye nokuphucula intsimi yombane kwindawo yokudibanisa eyahlukileyo. Ngo-2014, ngokuphucula ngakumbi iimeko zokusasazwa kwe-zinc kunye nokwenza ngcono isakhiwo esithe nkqo, i-single-photon detector inokusebenza okuphezulu kokubona, ukuya kuthi ga kwi-30%, kwaye ifikelela kwi-timing jitter emalunga ne-87 ps. Ngo-2016, uSANZARO M et al. wadibanisa i-InGaAs APD photodetector single-photon detector kunye ne-monolithic integrated resistor, wayila imodyuli yokubala i-compact single-photon esekelwe kwi-detector, kwaye wacebisa indlela ye-hybrid quench eyanciphisa kakhulu i-avalanche charge, ngaloo ndlela inciphisa i-post-pulse kunye ne-optical crosstalk, kwaye inciphisa i-timing jitter ukuya kwi-70 ps. Kwangaxeshanye, amanye amaqela ophando nawo enze uphando kwi-InGaAs APDisixhobo sokubona iifotoisixhobo sokubona ifoto enye. Umzekelo, iPrinceton Lightwave iyile isixhobo sokubona ifoto enye se-InGaAs/InPAPD esinesakhiwo esicwangcisiweyo saza sayisebenzisa kwezorhwebo. I-Shanghai Institute of Technical Physics ivavanye ukusebenza kwe-photon enye ye-APD photodetector isebenzisa ukususa iidiphozithi ze-zinc kunye ne-capacitive balanced gate pulse mode ene-dark count ye-3.6 × 10 ⁻⁴/ns pulse kwi-pulse frequency ye-1.5 MHz. UJoseph P nabanye bayila isakhiwo se-mesa i-InGaAs APD photodetector single photon detector ene-bandgap ebanzi, kwaye basebenzise i-InGaAsP njengezinto ezifunxayo ukuze bafumane inani eliphantsi lobumnyama ngaphandle kokuchaphazela ukusebenza kakuhle kokufumanisa.

Indlela yokusebenza ye-InGaAs APD photodetector single photon detector yindlela yokusebenza ekhululekileyo, oko kukuthi, i-APD photodetector kufuneka icime isekethe engaphandle emva kokuba kwenzeke i-avalanche, kwaye ibuye emva kokuba icime ixesha elithile. Ukuze kuncitshiswe impembelelo yexesha lokulibaziseka kokucima, yahlulwe kabini: Enye kukusebenzisa isekethe yokucima engasebenziyo okanye esebenzayo ukufezekisa ukucima, njengesekethe yokucima esebenzayo esetyenziswa yi-R Thew, njl. Umfanekiso (a), (b) ngumzobo olula wesekethe yokulawula ye-elektroniki kunye nesekethe yokucima esebenzayo kunye noqhagamshelo lwayo ne-APD photodetector, eyenzelwe ukusebenza kwimo yokusebenza egadiweyo okanye ekhululekileyo, inciphisa kakhulu ingxaki yangaphambili ye-post-pulse. Ngaphezu koko, ukusebenza kakuhle kokufumanisa kwi-1550 nm yi-10%, kwaye amathuba e-post-pulse ancitshiswa abe ngaphantsi kwe-1%. Okwesibini kukufezekisa ukucima ngokukhawuleza kunye nokubuyisela ngokulawula inqanaba le-voltage ye-bias. Ekubeni ingaxhomekekanga kulawulo lwempendulo ye-avalanche pulse, ixesha lokulibaziseka lokucima liyancipha kakhulu kwaye ukusebenza kakuhle kwe-detector kuphuculwe. Umzekelo, uLC Comandar nabanye basebenzisa imo ye-gated. I-gated single-photon detector esekelwe kwi-InGaAs/InPAPD yalungiswa. Ukusebenza kakuhle kwe-single-photon detector kwakungaphezulu kwe-55% kwi-1550 nm, kwaye amathuba okuba i-post-pulse ibe yi-7% afezekisiwe. Ngesi siseko, iYunivesithi yeSayensi neTekhnoloji yaseTshayina yaseka inkqubo ye-liDAR isebenzisa i-multi-mode fiber ngaxeshanye kunye ne-free-mode InGaAs APD photodetector single-photon detector. Izixhobo zovavanyo ziboniswe kuMfanekiso (c) kunye no-(d), kwaye ukufunyanwa kwamafu aneengqimba ezininzi anokuphakama kwe-12 km kufezekiswa ngesisombululo sexesha se-1 s kunye nesisombululo sendawo se-15 m.