Irahiko kotahiPūoko whakaahua InGaAs
Nā te tere o te whanaketanga o te LiDAR,te kimi māramatangaHe nui ake ngā whakaritenga mō te hangarau me te hangarau whānui e whakamahia ana mō te hangarau whakaahua aroturuki waka aunoa, kāore e taea e te tairongo me te taumira wā o te taputapu kite mārama iti tuku iho te whakatutuki i ngā hiahia tuturu. Ko te irahiko kotahi te waeine pūngao iti rawa o te mārama, ā, ko te taputapu kite mārama iti te taputapu whakamutunga mō te kite mārama iti. Ki te whakatauritea ki te InGaAsPūoko whakaahua APD, he tere ake te urupare, te tairongo me te whai huatanga o ngā pūoko pūoko kotahi-ira i runga i te pūoko whakaahua InGaAs APD. Nō reira, kua whakahaerehia he raupapa rangahau mō ngā pūoko pūoko kotahi-ira mō te pūoko whakaahua IN-GAAS APD i te kāinga me tāwāhi.
I whakawhanakehia tuatahitia e ngā kairangahau o Te Whare Wānanga o Milan i Itari tētahi tauira rua-ahu hei whakatauira i te whanonga whakawhiti o tētahi photon kotahi.pūoko whakaahua horongai te tau 1997, ā, i hoatu ngā hua whakatauira tau o ngā āhuatanga tauwhiro o tētahi pūoko whakaahua horonga photon kotahi. Kātahi ka tae ki te tau 2006, i whakamahia e ngā kairangahau te MOCVD hei whakarite i tētahi matapae āhuahanga papatahiPūoko whakaahua InGaAs APDte pūoko photon kotahi, i whakapiki ake i te whai huatanga o te kimi photon kotahi ki te 10% mā te whakaiti i te paparanga whakaata me te whakarei ake i te mara hiko i te atanga heterogeneous. I te tau 2014, mā te whakapai ake i ngā āhuatanga horapa konutea me te arotau i te hanganga poutū, he nui ake te whai huatanga o te pūoko photon kotahi, tae atu ki te 30%, ā, ka tutuki i te wiri wā tata ki te 87 ps. I te tau 2016, i whakauruhia e SANZARO M me ētahi atu te pūoko photon kotahi InGaAs APD me te ātete whakauru monolithic, i hangaia he kōwae tatau photon kotahi kiato i runga i te pūoko, ā, i whakaarohia he tikanga tinei ranu i whakaiti nui i te utu avalanche, nā reira ka whakaitihia te post-pulse me te whakawhitiwhiti whatu, me te whakaiti i te wiri wā ki te 70 ps. I taua wā anō, kua whakahaerehia hoki e ētahi atu rōpū rangahau he rangahau mō InGaAs APD.pūoko whakaahuahe pūoko photon kotahi. Hei tauira, kua hangaia e Princeton Lightwave he pūoko photon kotahi InGaAs/InPAPD me te hanganga papatahi, ā, kua whakamahia hei whakamahi arumoni. I whakamātauhia e te Shanghai Institute of Technical Physics te mahi photon kotahi o te pūoko whakaahua APD mā te tango i ngā putunga konutea me te aratau pāoro kuaha taurite capacitive me te tatau pōuri o te 3.6 × 10⁻⁴/ns pāoro i te auau pāoro o te 1.5 MHz. I hangaia e Joseph P me ētahi atu te hanganga mesa o te pūoko whakaahua InGaAs APD me te āputa roopu whānui ake, ā, i whakamahia e rātou te InGaAsP hei rauemi paparanga mimiti hei whiwhi i te tatau pōuri iti ake me te kore e pā ki te whai huatanga o te kimi.
Ko te aratau whakahaere o te pūoko whakaahua kotahi a InGaAs APD he aratau mahi kore utu, arā, me tinei e te pūoko whakaahua APD te ara iahiko taha i muri i te hinganga o te huka, ā, me whakaora anō i muri i te tineitanga mō tētahi wā. Hei whakaiti i te pānga o te wā whakaroa tineitanga, ka wehea kia rua ngā momo: Ko te tuatahi ko te whakamahi i te ara iahiko tineitanga kore mahi, te ara iahiko tineitanga hohe rānei hei whakatutuki i te tineitanga, pērā i te ara iahiko tineitanga hohe e whakamahia ana e te R Thew, me ētahi atu. Ko te Pikitia (a), (b) he hoahoa māmā o te mana hiko me te ara iahiko tineitanga hohe me tōna hononga ki te pūoko whakaahua APD, kua whakawhanakehia hei mahi i roto i te aratau kua āraia, i te aratau rere kore mahi rānei, ka whakaiti nui i te raruraru muri-pānga kāore anō kia kitea i mua. Heoi anō, ko te pai o te kitenga i te 1550 nm he 10%, ā, ko te tūponotanga o te muri-pānga kua whakaitihia ki raro iho i te 1%. Ko te tuarua ko te whakatutuki i te tineitanga tere me te whakaora mā te whakahaere i te taumata o te ngaohiko whakahāngai. Nā te mea kāore e whakawhirinaki ki te whakahaere urupare o te pā o te horonga, ka tino whakaitihia te wā whakaroa o te tinei, ā, ka pai ake te whai huatanga o te kitenga o te taputapu kite. Hei tauira, ka whakamahia e LC Comandar me ētahi atu te aratau kua kati. I whakaritea he taputapu kite kotahi-ira kua kati i runga i te InGaAs/InPAPD. Neke atu i te 55% te whai huatanga o te kitenga kotahi-ira i te 1550 nm, ā, i tutuki te tūponotanga o muri i te pā o te 7%. I runga i tēnei kaupapa, i whakatū te Whare Wānanga o te Pūtaiao me te Hangarau o Haina i tētahi pūnaha liDAR e whakamahi ana i te muka maha-aratau i honoa tahitia me te taputapu kite kotahi-ira InGaAs APD aratau kore utu. Kei te whakaatuhia ngā taputapu whakamātautau i te Pikitia (c) me te (d), ā, ka tutuki te kitenga o ngā kapua maha-paparanga me te teitei o te 12 km me te taumira wā o te 1 s me te taumira ā-wāhi o te 15 m.
Wā tuku: Mei-07-2024