Likhatelo-pele tsa morao-raoli-photodetectors tse nang le kutloisiso e phahameng
Mocheso oa kamore o na le kutloisiso e phahameng ea 1550 nmSesebelisoa sa avalanche photodiode
Sehlopheng se haufi sa infrared (SWIR), li-avalanche diode tse nang le kutlo e phahameng haholo li sebelisoa haholo puisanong ea optoelectronic le lits'ebetsong tsa liDAR. Leha ho le joalo, hona joale haufi le infrared avalanche photodiode (APD) e laoloang ke Indium gallium arsenic avalanche breakdown diode (InGaAs APD) esale e fokotsoa ke lerata la ionization la ho thulana ha lisebelisoa tsa setso tse ngata, indium phosphide (InP) le indium aluminium arsenic ( InAlAs), e leng se bakang phokotso e kholo ea kutlo ea sesebelisoa. Ho theosa le lilemo, bafuputsi ba bangata ba ntse ba batla ka mafolofolo lisebelisoa tse ncha tsa semiconductor tse tsamaellanang le InGaAs le InP optoelectronic process process mme li na le ts'ebetso ea lerata ea ionization e tlase haholo e ts'oanang le lisebelisoa tse ngata tsa silicon.
Sesebelisoa se secha sa 1550 nm avalanche photodiode se thusa nts'etsopele ea lits'ebetso tsa LiDAR.
Sehlopha sa bafuputsi ba United Kingdom le United States ka lekhetlo la pele ba atlehile ho hlahisa mochine o mocha oa sensitivity 1550 nm APD (Avalanche photodetector), katleho e tšepisang ho ntlafatsa haholo ts'ebetso ea lits'ebetso tsa LiDAR le lisebelisoa tse ling tsa optoelectronic.
Lisebelisoa tse ncha li fana ka melemo ea bohlokoa
Ntlha ea bohlokoa ea lipatlisiso tsena ke tšebeliso e ncha ea lisebelisoa. Bafuputsi ba khethile GaAsSb e le lera la ho monya le AlGaAsSb joalo ka sekhahla sa ho eketsa. Moralo ona o fapane le InGaAs/InP ea setso mme o tlisa melemo e mengata:
1.GaAsSb absorption layer: GaAsSb e na le coefficient e ts'oanang ea ho monya ho InGaAs, 'me phetoho ea ho tloha GaAsSb ho ea ho AlGaAsSb (multiplier layer) e bonolo, e fokotsa phello ea leraba le ho ntlafatsa lebelo le bokhoni ba ho monya sesebelisoa.
2.AlGaAsSb multiplier layer: AlGaAsSb multiplier layer e phahametse ea setso InP le InAlAs multiplier layer ts'ebetsong. E bonahala haholo-holo ka phaello e phahameng mochesong oa kamore, bandwidth e phahameng le lerata le feteletseng le tlase haholo.
Ka matšoao a ts'ebetso e ntle haholo
E nchaAPD photodetector(avalanche photodiode detector) e boetse e fana ka lintlafatso tse kholo ho metrics ea ts'ebetso:
1. Phaello e phahameng ka ho fetisisa: Phaello e phahameng ka ho fetisisa ea 278 e ile ea finyelloa mocheso oa kamore, 'me haufinyane Dr. Jin Xiao o ntlafalitse ho ntlafatsa sebopeho le ts'ebetso,' me phaello e phahameng e ile ea eketseha ho M = 1212.
2. Lerata le tlaase haholo: le bontša lerata le tlaase haholo le feteletseng (F <3, fumana M = 70; F<4, fumana M=100).
3. Ts'ebetso e phahameng ea quantum: tlas'a phaello e phahameng, katleho ea quantum e phahame ho feta 5935.3%. Botsitso bo matla ba mocheso: kutloisiso ea ho senyeha ha mocheso o tlase ke hoo e ka bang 11.83 mV/K.
Setšoantšo sa 1 Lerata le feteletseng la APDlisebelisoa tsa photodetectorbapisoa le tse ling tsa APD photodetector
Litebello tse pharaletseng tsa ts'ebeliso
APD ena e ncha e na le litlamorao tsa bohlokoa bakeng sa lits'ebetso tsa liDAR le lits'ebetso tsa photon:
1. Karolelano e ntlafetseng ea pontšo-ho-lerata: Phaello e phahameng le litšoaneleho tse tlaase tsa lerata li ntlafatsa haholo karo-karolelano ea pontšo-ho-lerata, e leng ea bohlokoa bakeng sa likopo libakeng tse futsanehileng tsa photon, tse kang ho hlahloba khase e futhumatsang lefatše.
2. Tšebelisano e matla: Sesebelisoa se secha sa APD photodetector (avalanche photodetector) se etselitsoe hore se lumellane le liforomo tsa morao-rao tsa indium phosphide (InP) optoelectronics, ho netefatsa ho kopanngoa ha seamless le mekhoa ea puisano ea khoebo e teng.
3. Ts'ebetso e phahameng ea ts'ebetso: E ka sebetsa ka katleho mocheso oa kamore ntle le mekhoa e pholileng e rarahaneng, e nolofatsa ho tsamaisoa ka mekhoa e sa tšoaneng e sebetsang.
Ntlafatso ea sesebelisoa sena se secha sa 1550 nm SACM APD photodetector (avalanche photodetector) e emela katleho e kholo tšimong, E rarolla mefokolo ea bohlokoa e amanang le lerata le feteletseng le ho fumana lihlahisoa tsa bandwidth ho meralo ea setso ea APD photodetector (avalanche photodetector). Boqapi bona bo lebelletsoe ho holisa bokhoni ba lits'ebetso tsa liDAR, haholo lits'ebetsong tsa liDAR tse sa sebetsoeng, hammoho le likhokahano tsa sebaka sa mahala.
Nako ea poso: Jan-13-2025