Cov kev nce qib tsis ntev los no hauvcov duab ntes av qeeg uas muaj kev rhiab heev
Chav tsev kub siab rhiab heev 1550 nmavalanche photodiode detector
Hauv qhov ze infrared (SWIR) band, cov diodes avalanche diodes uas muaj kev rhiab heev thiab ceev ceev tau siv dav hauv kev sib txuas lus optoelectronic thiab liDAR daim ntawv thov. Txawm li cas los xij, tam sim no ze infrared avalanche photodiode (APD) uas muaj Indium gallium arsenic avalanche breakdown diode (InGaAs APD) yeej ib txwm raug txwv los ntawm lub suab nrov ionization ntawm cov ntaub ntawv multiplier cheeb tsam ib txwm muaj, indium phosphide (InP) thiab indium txhuas arsenic (InAlAs), ua rau muaj kev txo qis ntawm qhov rhiab heev ntawm lub cuab yeej. Tau ntau xyoo, ntau tus kws tshawb fawb tab tom nrhiav cov ntaub ntawv semiconductor tshiab uas sib xws nrog InGaAs thiab InP optoelectronic platform cov txheej txheem thiab muaj kev cuam tshuam tsawg heev ionization suab nrov zoo ib yam li cov ntaub ntawv silicon loj.
Lub tshuab ntes photodiode 1550 nm avalanche tshiab pab txhawb kev txhim kho LiDAR systems
Ib pab neeg tshawb fawb hauv tebchaws United Kingdom thiab Tebchaws Meskas tau ua tiav thawj zaug tsim lub tshuab ntsuas duab APD tshiab uas muaj qhov rhiab heev 1550 nm (lub tshuab ntes duab av qeeg), ib qho kev tshawb pom tshiab uas cog lus tias yuav txhim kho kev ua tau zoo ntawm LiDAR systems thiab lwm yam kev siv optoelectronic.
Cov ntaub ntawv tshiab muaj cov txiaj ntsig tseem ceeb
Qhov tseem ceeb ntawm txoj kev tshawb fawb no yog kev siv cov khoom siv tshiab. Cov kws tshawb fawb tau xaiv GaAsSb ua txheej nqus thiab AlGaAsSb ua txheej sib npaug. Tus qauv tsim no txawv ntawm InGaAs/InP ib txwm muaj thiab coj cov txiaj ntsig zoo heev:
1. Txheej nqus GaAsSb: GaAsSb muaj cov coefficient nqus zoo ib yam li InGaAs, thiab kev hloov pauv ntawm txheej nqus GaAsSb mus rau AlGaAsSb (txheej ntau) yooj yim dua, txo qhov cuam tshuam ntawm qhov ntxiab thiab txhim kho qhov ceev thiab kev nqus ntawm lub cuab yeej.
2. Txheej AlGaAsSb multiplier: Txheej AlGaAsSb multiplier zoo dua li txheej InP thiab InAlAs multiplier ib txwm muaj hauv kev ua tau zoo. Nws feem ntau pom hauv qhov nce siab ntawm chav tsev kub, bandwidth siab thiab suab nrov tsawg heev.
Nrog cov ntsuas kev ua tau zoo heev
Tus tshiabAPD photodetector(avalanche photodiode detector) kuj muaj kev txhim kho zoo hauv kev ntsuas kev ua tau zoo:
1. Qhov nce siab heev: Qhov nce siab heev ntawm 278 tau ua tiav ntawm chav tsev kub, thiab tsis ntev los no Dr. Jin Xiao tau txhim kho qhov kev tsim kho thiab cov txheej txheem, thiab qhov nce siab tshaj plaws tau nce mus rau M = 1212.
2. Suab nrov qis heev: qhia txog suab nrov qis heev (F < 3, nce M = 70; F < 4, nce M = 100).
3. Kev ua haujlwm zoo quantum: nyob rau hauv qhov siab tshaj plaws, qhov ua haujlwm quantum yog siab txog 5935.3%. Kev ruaj khov kub: kev tawg ntawm qhov kub qis yog li 11.83 mV / K.
Daim Duab 1 Suab nrov ntau dhau ntawm APDcov khoom siv photodetectorpiv rau lwm cov APD photodetector
Kev cia siab rau daim ntawv thov dav dav
APD tshiab no muaj cov txiaj ntsig tseem ceeb rau cov kab ke liDAR thiab cov ntawv thov photon:
1. Kev txhim kho qhov sib piv ntawm lub teeb liab thiab lub suab nrov: Qhov nce siab thiab lub suab qis ua rau qhov sib piv ntawm lub teeb liab thiab lub suab nrov zoo dua, uas yog qhov tseem ceeb rau cov ntawv thov hauv cov chaw tsis muaj photon, xws li kev saib xyuas cov pa roj av.
2. Kev sib raug zoo heev: Lub APD photodetector tshiab (avalanche photodetector) yog tsim los kom sib xws nrog cov platform indium phosphide (InP) optoelectronics tam sim no, kom ntseeg tau tias muaj kev sib koom ua ke nrog cov kab ke sib txuas lus lag luam uas twb muaj lawm.
3. Kev ua haujlwm zoo: Nws tuaj yeem ua haujlwm tau zoo ntawm qhov kub thiab txias hauv chav tsev yam tsis muaj cov txheej txheem txias nyuaj, ua rau kev xa mus rau ntau yam kev siv.
Kev tsim kho tshiab ntawm 1550 nm SACM APD photodetector (avalanche photodetector) no sawv cev rau qhov kev tshawb pom loj hauv daim teb no, daws cov kev txwv tseem ceeb uas cuam tshuam nrog suab nrov ntau dhau thiab cov khoom siv bandwidth hauv cov qauv APD photodetector (avalanche photodetector) ib txwm muaj. Qhov kev tsim kho tshiab no xav tias yuav txhawb nqa lub peev xwm ntawm liDAR systems, tshwj xeeb tshaj yog hauv cov unmanned liDAR systems, nrog rau kev sib txuas lus dawb.
Lub sijhawm tshaj tawm: Lub Ib Hlis-13-2025