Nā holomua hou i lokonā mea ʻike kiʻi avalanche kiʻekiʻe
ʻO ke kiʻekiʻe o ka mahana o ka lumi 1550 nmmea ʻike photodiode avalanche
Ma ke kāʻei kokoke i ka infrared (SWIR), hoʻohana nui ʻia nā diode avalanche wikiwiki kiʻekiʻe i ke kamaʻilio optoelectronic a me nā noi liDAR. Eia nō naʻe, ʻo ka photodiode avalanche kokoke i ka infrared (APD) i hoʻomalu ʻia e ka Indium gallium arsenic avalanche breakdown diode (InGaAs APD) ua kaupalena mau ʻia e ka walaʻau ionization collision random o nā mea multiplier region kuʻuna, indium phosphide (InP) a me indium aluminum arsenic (InAlAs), e hopena ana i ka emi nui ʻana o ka ʻike o ka hāmeʻa. I nā makahiki i hala iho nei, ke ʻimi nei nā mea noiʻi he nui i nā mea semiconductor hou e kūlike me nā kaʻina hana paepae optoelectronic InGaAs a me InP a he hana walaʻau ionization hopena haʻahaʻa loa e like me nā mea silicon nui.
Kōkua ka mea ʻike photodiode avalanche 1550 nm hou i ka hoʻomohala ʻana o nā ʻōnaehana LiDAR
Ua hoʻomohala kūleʻa kahi hui o nā kānaka noiʻi ma United Kingdom a me ʻAmelika Hui Pū ʻIa no ka manawa mua i kahi mea ʻike kiʻi APD 1550 nm kiʻekiʻe loa (mea ʻike kiʻi avalanche), kahi holomua i hoʻohiki e hoʻomaikaʻi nui i ka hana o nā ʻōnaehana LiDAR a me nā noi optoelectronic ʻē aʻe.
Hāʻawi nā mea hou i nā pono nui
ʻO ka mea nui o kēia noiʻi ʻana, ʻo ia ka hoʻohana hou ʻana i nā mea. Ua koho nā mea noiʻi iā GaAsSb ma ke ʻano he papa omo a me AlGaAsSb ma ke ʻano he papa hoʻonui. ʻOkoʻa kēia hoʻolālā mai ka InGaAs/InP kuʻuna a lawe mai i nā pono koʻikoʻi:
1. Papa omo ʻo GaAsSb: Loaʻa iā GaAsSb kahi coefficient omo like me InGaAs, a ʻoi aku ka maʻalahi o ka hoʻololi ʻana mai ka papa omo ʻo GaAsSb a i AlGaAsSb (papa hoʻonui), e hōʻemi ana i ka hopena pahele a hoʻomaikaʻi i ka wikiwiki a me ka pono omo o ka hāmeʻa.
2. Papa hoʻonui AlGaAsSb: ʻOi aku ka maikaʻi o ka papa hoʻonui AlGaAsSb ma mua o ka papa hoʻonui InP a me InAlAs kuʻuna ma ka hana. Hōʻike nui ʻia ia i ka loaʻa kiʻekiʻe ma ka mahana o ka lumi, ka bandwidth kiʻekiʻe a me ka walaʻau haʻahaʻa loa.
Me nā hōʻailona hana maikaʻi loa
ʻO ka mea houMea ʻike kiʻi APD(avalanche photodiode detector) hāʻawi pū kekahi i nā hoʻomaikaʻi koʻikoʻi i nā metrika hana:
1. Loaʻa kiʻekiʻe loa: Ua hoʻokō ʻia ka loaʻa kiʻekiʻe loa o 278 ma ka mahana o ka lumi, a ua hoʻomaikaʻi koke ʻo Kauka Jin Xiao i ka hoʻonui ʻana i ka hoʻonohonoho ʻana a me ke kaʻina hana, a ua hoʻonui ʻia ka loaʻa kiʻekiʻe loa i M=1212.
2. Haʻahaʻa loa ka walaʻau: hōʻike i ka walaʻau keu haʻahaʻa loa (F < 3, loaʻa M = 70; F<4, loaʻa M=100).
3. Ka pono quantum kiʻekiʻe: ma lalo o ka loaʻa nui loa, ʻo ka pono quantum he kiʻekiʻe e like me 5935.3%. Paʻa ikaika o ka mahana: ʻo ka ʻike haki ma ka mahana haʻahaʻa ma kahi o 11.83 mV/K.
Kiʻi 1 Ka walaʻau nui o APDnā mea hana ʻike kiʻihoʻohālikelike ʻia me nā mea ʻike kiʻi APD ʻē aʻe
Nā manaʻolana noi ākea
He hopena koʻikoʻi kēia APD hou no nā ʻōnaehana liDAR a me nā noi photon:
1. Hoʻomaikaʻi ʻia ka lakio signal-to-noise: ʻO nā ʻano loaʻa kiʻekiʻe a me nā ʻano walaʻau haʻahaʻa e hoʻomaikaʻi nui i ka lakio signal-to-noise, he mea koʻikoʻi ia no nā noi ma nā wahi photon-ilihune, e like me ka nānā ʻana i ke kinoea ʻōmaʻomaʻo.
2. Hoʻohālikelike ikaika: Ua hoʻolālā ʻia ka APD photodetector hou (avalanche photodetector) e kūlike me nā kahua optoelectronics indium phosphide (InP) o kēia manawa, e hōʻoiaʻiʻo ana i ka hoʻohui pono ʻana me nā ʻōnaehana kamaʻilio kalepa e kū nei.
3. Ka hana pono kiʻekiʻe: Hiki iā ia ke hana pono ma ka mahana o ka lumi me ka ʻole o nā ʻano hoʻoluʻu paʻakikī, e hoʻomaʻalahi ana i ka hoʻolaha ʻana i nā noi hana like ʻole.
ʻO ka hoʻomohala ʻana o kēia 1550 nm SACM APD photodetector hou (avalanche photodetector) he holomua nui ia ma ke kahua, e hoʻoponopono ana i nā palena koʻikoʻi e pili ana i ka walaʻau nui a me nā huahana bandwidth loaʻa i nā hoʻolālā APD photodetector kuʻuna (avalanche photodetector). Manaʻo ʻia kēia hana hou e hoʻoikaika i nā hiki o nā ʻōnaehana liDAR, ʻoi aku hoʻi i nā ʻōnaehana liDAR unmanned, a me nā kamaʻilio ākea manuahi.
Ka manawa hoʻouna: Ian-13-2025