Intuthuko yakamuva kuukuzwela okuphezulu kwe-avalanche photodetectors
Izinga lokushisa kwegumbi ukuzwela okuphezulu 1550 nmumtshina we-avalanche photodiode
Kubhendi ye-infrared (SWIR) eseduze, ama-avalanche diode azwelayo aphezulu asetshenziswa kakhulu ekuxhumaneni kwe-optoelectronic nasezinhlelweni ze-liDAR. Nokho, i-avalanche photodiode yamanje eseduze ne-infrared (APD) ebuswa yi-Indium gallium arsenic avalanche breakdown diode (InGaAs APD) ibilokhu ikhawulelwe umsindo we-ionization wokungqubuzana okungahleliwe wezinto ezivamile zesifunda, i-indium phosphide (InP) kanye ne-indium aluminium arsenic (InAlAs) ekuzweleni okubalulekile kwedivayisi. Ngokuhamba kweminyaka, abacwaningi abaningi babheka ngenkuthalo izinto ezintsha ze-semiconductor ezihambisana ne-InGaAs kanye nezinqubo zeplathifomu ye-InP optoelectronic futhi ezinomphumela ophansi kakhulu womsindo we-ionization ofana nezinto eziningi ze-silicon.
Umtshina omusha we-1550 nm avalanche photodiode usiza ukuthuthukiswa kwezinhlelo ze-LiDAR
Ithimba labacwaningi e-United Kingdom nase-United States ngokokuqala ngqá lenze ngempumelelo i-photodetector entsha ye-ultra-high sensitivity 1550 nm APD (i-avalanche photodetector), impumelelo ethembisa ukuthuthukisa kakhulu ukusebenza kwezinhlelo ze-LiDAR nezinye izinhlelo zokusebenza ze-optoelectronic.
Izinto ezintsha zinikeza izinzuzo ezibalulekile
Okugqamile kulolu cwaningo ukusetshenziswa okusha kwezinto. Abacwaningi bakhethe i-GaAsSb njengesendlalelo sokumuncwa kanye ne-AlGaAsSb njengesendlalelo sokuphindaphinda. Lo mklamo wehlukile ku-InGaAs/InP evamile futhi uletha izinzuzo ezibalulekile:
1.Isendlalelo sokumunca se-GaAsSb: I-GaAsSb ine-coefficient yokumunca efanayo ku-InGaAs, futhi ukuguqulwa ukusuka kungqimba lokumunca lwe-GaAsSb ukuya ku-AlGaAsSb (ungqimba oluphindaphindayo) kulula, kunciphisa umphumela wokucupha futhi kuthuthukise isivinini nokusebenza kahle kokumuncwa kwedivayisi.
2.Isendlalelo sokuphindaphinda se-AlGaAsSb: Isendlalelo sesiphindaphinda se-AlGaAsSb siphezulu kunesendlalelo esivamile se-InP kanye nesendlalelo sokuphindaphinda se-InAlAs ekusebenzeni. Ibonakala ngokuyinhloko ekuzuzeni okuphezulu ekamelweni lokushisa, umkhawulokudonsa ophezulu kanye nomsindo oweqisayo ophansi kakhulu.
Ngezinkomba zokusebenza ezinhle kakhulu
OkushaIsitholi sesithombe se-APD(isitholi se-avalanche photodiode) siphinde sinikeze ngentuthuko ebalulekile kumamethrikhi okusebenza:
1. Ukuzuza okuphezulu kakhulu: Ukuzuza okuphezulu kakhulu okungu-278 kwafinyelelwa kuzinga lokushisa legumbi, futhi muva nje uDkt. Jin Xiao uthuthukise ukuthuthukiswa kwesakhiwo kanye nenqubo, futhi inzuzo ephezulu yanda yaba ngu-M=1212.
2. Umsindo ophansi kakhulu: ubonisa umsindo oweqisayo ophansi kakhulu (F <3, zuza M = 70; F<4, zuza M=100).
3. Ukusebenza okuphezulu kwe-quantum: ngaphansi kwenzuzo ephezulu, ukusebenza kahle kwe-quantum kuphezulu njenge-5935.3%. Ukuzinza okuqinile kwezinga lokushisa: ukuzwela kokuqhekeka ezingeni lokushisa eliphansi cishe ku-11.83 mV/K.
Umdwebo 1 Umsindo oweqile we-APDamadivaysi e-photodetectoruma kuqhathaniswa nenye i-APD photodetector
Amathemba ohlelo olubanzi
Le APD entsha inemiphumela ebalulekile yezinhlelo ze-liDAR nezinhlelo zokusebenza ze-photon:
1. Isilinganiso esithuthukisiwe sesignali-kuya-kumsindo: Ukuzuza okuphezulu nezici zomsindo ophansi zithuthukisa kakhulu isilinganiso sesignali-kuya-nomsindo, esibalulekile ezinhlelweni zokusebenza ezindaweni ezimpofu ze-photon, njengokuqapha igesi ebamba ukushisa.
2. Ukuhambisana okuqinile: I-photodetector entsha ye-APD (i-avalanche photodetector) iklanyelwe ukuhambisana nezinkundla ze-optoelectronics zamanje ze-indium phosphide (InP), okuqinisekisa ukuhlanganiswa okungenamthungo nezinhlelo zokuxhumana zezentengiselwano ezikhona.
3. Ukusebenza kahle okuphezulu: Ingasebenza ngokuphumelelayo ekamelweni lokushisa ngaphandle kwezinqubo zokupholisa eziyinkimbinkimbi, ukwenza kube lula ukuthunyelwa kuzinhlelo zokusebenza ezihlukahlukene.
Ukuthuthukiswa kwalesi sithwebuli sesithombe esisha esingu-1550 nm SACM APD (i-avalanche photodetector) kumelela impumelelo enkulu emkhakheni, Ikhuluma ngemikhawulo eyinhloko ehlobene nomsindo owedlulele futhi ithole imikhiqizo yomkhawulokudonsa emiklameni yendabuko ye-APD photodetector (i-avalanche photodetector). Lokhu okusha kulindeleke ukuthi kukhuphule amandla ezinhlelo ze-liDAR, ikakhulukazi ezinhlelweni ze-liDAR ezingenamuntu, kanye nezokuxhumana endaweni yamahhala.
Isikhathi sokuthumela: Jan-13-2025