Kev nce qib tsis ntev los no hauvsiab rhiab heev avalanche photodetectors
Chav tsev kub siab rhiab heev 1550nmavalanche photodiode ntes
Nyob rau hauv qhov ze infrared (SWIR) band, siab rhiab heev avalanche diodes yog dav siv nyob rau hauv optoelectronic kev sib txuas lus thiab liDAR daim ntaub ntawv. Txawm li cas los xij, tam sim no nyob ze-infrared avalanche photodiode (APD) dominated los ntawm Indium gallium arsenic avalanche tawg diode (InGaAs APD) ib txwm raug txwv los ntawm kev sib tsoo ionization nrov nrov ntawm cov khoom siv hauv cheeb tsam ib txwm muaj, indium phosphide (InP) thiab indium aluminium arsenic ( InAlAs), uas ua rau muaj kev txo qis hauv qhov rhiab heev ntawm lub cuab yeej. Tau ntau xyoo, ntau tus kws tshawb fawb tau nquag nrhiav cov khoom siv semiconductor tshiab uas tau sib xws nrog InGaAs thiab InP optoelectronic platform txheej txheem thiab muaj kev cuam tshuam ultra-tsawg ionization suab nrov ua haujlwm zoo ib yam li cov ntaub ntawv silicon ntau.
Lub tswv yim tshiab 1550 nm avalanche photodiode ntes pab txhim kho LiDAR systems
Ib pab pawg ntawm cov kws tshawb fawb hauv tebchaws United Kingdom thiab Tebchaws Meskas tau ua tiav thawj zaug ua tiav qhov tshiab ultra-siab rhiab heev 1550 nm APD photodetector (Lub avalanche photodetector), qhov kev ua tiav uas tau cog lus tias yuav txhim kho kev ua tau zoo ntawm LiDAR systems thiab lwm yam kev siv optoelectronic.
Cov ntaub ntawv tshiab muab cov txiaj ntsig tseem ceeb
Qhov tseem ceeb ntawm qhov kev tshawb fawb no yog kev siv cov ntaub ntawv tshiab. Cov kws tshawb fawb tau xaiv GaAsSb ua cov txheej txheem nqus thiab AlGaAsSb ua cov txheej txheem sib npaug. Qhov kev tsim no txawv ntawm cov tsoos InGaAs / InP thiab coj cov txiaj ntsig tseem ceeb:
1.GaAsSb absorption txheej: GaAsSb muaj qhov zoo sib xws ntawm kev nqus coefficient rau InGaAs, thiab kev hloov ntawm GaAsSb nqus txheej rau AlGaAsSb (multiplier txheej) yog yooj yim dua, txo cov cuab yeej cuab tam thiab txhim kho qhov ceev thiab nqus efficiency ntawm lub cuab yeej.
2.AlGaAsSb multiplier txheej: AlGaAsSb multiplier txheej yog superior rau tsoos InP thiab InAlAs multiplier txheej hauv kev ua tau zoo. Nws yog tsuas yog xav nyob rau hauv siab nce nyob rau hauv chav tsev kub, siab bandwidth thiab ultra-tsawg tshaj suab nrov.
Nrog cov ntsuas kev ua tau zoo heev
Qhov tshiabAPD photodetector(avalanche photodiode ntes) kuj tseem muaj kev txhim kho tseem ceeb hauv kev ntsuas kev ua haujlwm:
1. Ultra-siab nce: qhov nce siab tshaj plaws ntawm 278 tau ua tiav ntawm chav sov, thiab tsis ntev los no Dr. Jin Xiao tau txhim kho cov qauv kev ua kom zoo thiab cov txheej txheem, thiab qhov siab tshaj plaws tau nce mus rau M = 1212.
2. Tsis tshua muaj suab nrov: qhia tau hais tias tsis tshua muaj suab nrov (F <3, nce M = 70; F<4, nce M = 100).
3. High quantum efficiency: nyob rau hauv lub siab tshaj plaws nce, lub quantum efficiency yog siab li 5935.3%. Muaj zog kub ruaj khov: tawg rhiab heev ntawm qhov kub thiab txias yog li 11.83 mV / K.
Fig 1 Ntau lub suab nrov ntawm APDcov khoom siv photodetectorpiv nrog rau lwm yam APD photodetector
Wide application prospects
APD tshiab no muaj qhov cuam tshuam tseem ceeb rau liDAR systems thiab photon applications:
1. Txhim kho lub teeb liab-rau-suab nrov piv: qhov nce siab thiab qis suab nrov zoo txhim kho lub teeb liab-rau-suab nrov piv, uas yog qhov tseem ceeb rau kev siv hauv qhov chaw tsis zoo photon, xws li kev saib xyuas lub tsev cog khoom roj.
2. Strong compatibility: Tus tshiab APD photodetector (avalanche photodetector) yog tsim los ua tau raws li tam sim no indium phosphide (InP) optoelectronics platforms, kom ntseeg tau seamless kev koom ua ke nrog kev lag luam kev sib txuas lus uas twb muaj lawm.
3. Kev ua haujlwm siab: Nws tuaj yeem ua haujlwm tau zoo ntawm chav tsev kub yam tsis muaj kev ua kom txias txias, ua kom yooj yim rau kev xa mus rau ntau yam kev siv.
Txoj kev loj hlob ntawm qhov tshiab 1550 nm SACM APD photodetector (avalanche photodetector) sawv cev rau kev ua haujlwm loj hauv kev ua haujlwm, Chaw nyob cov kev txwv tseem ceeb cuam tshuam nrog ntau lub suab nrov thiab nce bandwidth cov khoom hauv cov khoom siv APD photodetector (avalanche photodetector) tsim. Qhov kev tsim kho tshiab no xav kom txhawb nqa lub peev xwm ntawm liDAR systems, tshwj xeeb tshaj yog nyob rau hauv cov tshuab tsis muaj neeg siv liDAR, nrog rau kev sib txuas lus dawb.
Post lub sij hawm: Jan-13-2025