Intuthuko yakamuva kuama-photodetector e-avalanche azwela kakhulu
Ukushisa kwegumbi okuzwela kakhulu okungu-1550 nmisitholi se-photodiode se-avalanche
Ku-near infrared (SWIR), ama-avalanche diode ashesha kakhulu asetshenziswa kakhulu ekuxhumaneni kwe-optoelectronic kanye nezinhlelo zokusebenza ze-liDAR. Kodwa-ke, i-avalanche photodiode yamanje ye-near-infrared avalanche (APD) elawulwa yi-Indium gallium arsenic avalanche breakdown diode (InGaAs APD) ibilokhu inqunyelwe umsindo we-ionization wokungqubuzana okungahleliwe wezinto zendabuko zesifunda esiphindaphindayo, i-indium phosphide (InP) kanye ne-indium aluminium arsenic (InAlAs), okuholela ekunciphiseni okukhulu kokuzwela kwedivayisi. Eminyakeni edlule, abacwaningi abaningi bafuna ngenkuthalo izinto ezintsha ze-semiconductor ezihambisana nezinqubo zepulatifomu ye-InGaAs kanye ne-InP optoelectronic futhi ezisebenza kahle kakhulu njengezinto ze-silicon ezinkulu.
Isitholi se-photodiode esisha esingu-1550 nm se-avalanche sisiza ukuthuthukiswa kwezinhlelo ze-LiDAR
Ithimba labacwaningi e-United Kingdom nase-United States okokuqala ngqa lithuthukise ngempumelelo i-photodetector entsha ye-APD ye-1550 nm ezwela kakhulu (umshini wokuthola izithombe we-avalanche), intuthuko ethembisa ukuthuthukisa kakhulu ukusebenza kwezinhlelo ze-LiDAR nezinye izinhlelo zokusebenza ze-optoelectronic.
Izinto ezintsha zinikeza izinzuzo ezibalulekile
Okuvelele kulolu cwaningo ukusetshenziswa okusha kwezinto zokwakha. Abacwaningi bakhethe i-GaAsSb njengesendlalelo sokumunca kanye ne-AlGaAsSb njengesendlalelo sokuphindaphinda. Lo mklamo uhlukile kwi-InGaAs/InP yendabuko futhi uletha izinzuzo ezibalulekile:
1. Isendlalelo sokumunca se-GaAsSb: I-GaAsSb ine-coefficient yokumunca efanayo ne-InGaAs, futhi ukushintsha kusuka kusendlalelo sokumunca se-GaAsSb kuya ku-AlGaAsSb (isendlalelo esiphindaphindayo) kulula, kunciphisa umphumela we-trap futhi kuthuthukise isivinini kanye nokusebenza kahle kokumunca kwedivayisi.
2. Isendlalelo sokuphindaphinda se-AlGaAsSb: Isendlalelo sokuphindaphinda se-AlGaAsSb singcono kunesendlalelo sokuphindaphinda se-InP ne-InAlAs esivamile ekusebenzeni. Sibonakala kakhulu ekuzuzeni okuphezulu ekushiseni kwegumbi, i-bandwidth ephezulu kanye nomsindo oweqile ophansi kakhulu.
Ngezinkomba zokusebenza ezinhle kakhulu
OkushaIsitholi sezithombe se-APD(isitholi se-avalanche photodiode) siphinde sinikeze ukuthuthukiswa okuphawulekayo kuma-metric okusebenza:
1. Inzuzo ephezulu kakhulu: Inzuzo ephezulu kakhulu engu-278 ifinyelelwe ekushiseni kwegumbi, futhi muva nje uDkt. Jin Xiao uthuthukise ukulungiswa kwesakhiwo kanye nenqubo, futhi inzuzo ephezulu kakhulu inyuswe yaba yi-M=1212.
2. Umsindo ophansi kakhulu: ubonisa umsindo oweqile ophansi kakhulu (F < 3, zuza M = 70; F<4, zuza M=100).
3. Ukusebenza kahle kwe-quantum ephezulu: ngaphansi kokuzuza okukhulu, ukusebenza kahle kwe-quantum kuphezulu njengo-5935.3%. Ukuqina kokushisa okuqinile: ukuzwela kokuqhekeka ekushiseni okuphansi cishe ku-11.83 mV/K.
Umfanekiso 1 Umsindo oweqile we-APDamadivayisi okuthola izithombeuma kuqhathaniswa nezinye izitholi ze-APD
Amathemba amaningi okusebenzisa
Le APD entsha inemiphumela ebalulekile ezinhlelweni ze-liDAR kanye nezinhlelo zokusebenza ze-photon:
1. Isilinganiso esithuthukisiwe sesignali kuya kumsindo: Izici zokuzuza okuphezulu nomsindo ophansi zithuthukisa kakhulu isilinganiso sesignali kuya kumsindo, okubaluleke kakhulu ekusetshenzisweni ezindaweni ezingenayo i-photon, njengokuqapha amagesi okushisa ukushisa.
2. Ukuhambisana okuqinile: I-APD photodetector entsha (i-avalanche photodetector) yenzelwe ukuthi ihambisane namapulatifomu e-indium phosphide (InP) optoelectronics amanje, okuqinisekisa ukuhlanganiswa okungenamthungo nezinhlelo zokuxhumana zezentengiselwano ezikhona.
3. Ukusebenza kahle kakhulu: Ingasebenza kahle ekamelweni lokushisa ngaphandle kwezindlela eziyinkimbinkimbi zokupholisa, okwenza kube lula ukuthunyelwa kwezinhlelo zokusebenza ezahlukahlukene ezisebenzayo.
Ukuthuthukiswa kwalesi sitholi se-photodetector esisha se-SACM APD esingu-1550 nm (isitholi se-avalanche) simelela intuthuko enkulu emkhakheni, Sibhekana nemikhawulo ebalulekile ehlobene nomsindo oweqile kanye nemikhiqizo ye-gain bandwidth kumiklamo yendabuko ye-APD photodetector (isitholi se-avalanche). Lokhu kusungulwa kulindeleke ukuthi kuthuthukise amakhono ezinhlelo ze-liDAR, ikakhulukazi ezinhlelweni ze-liDAR ezingenamuntu, kanye nokuxhumana kwesikhala esikhululekile.
Isikhathi sokuthunyelwe: Jan-13-2025