Chinoongorora fotoni imwe chete yeInGaAs

Foton imwe cheteInGaAs photodetector

Nekukura nekukurumidza kweLiDAR, iyokuonekwa kwechiedzaTekinoroji uye tekinoroji inoshandiswa pakutsvaga mifananidzo yemotokari otomatiki ine zvinodiwawo zvakanyanya, kunzwisisika uye kugadziriswa kwenguva kwechinoongorora chinoshandiswa mutekinoroji yekuona chiedza chidiki hazvigone kusangana nezvinodiwa chaizvo. Photon imwe chete ndiyo diki pane simba rechiedza, uye chinoongorora chine kugona kwekuona fotoni imwe chete ndicho chishandiso chekupedzisira chekuona chiedza chidiki. Zvichienzaniswa neInGaAsChinoongorora mufananidzo cheAPD, ma "single-photon detector" akavakirwa paInGaAs APD photodetector ane kukurumidza kupindura, kunzwa uye kushanda zvakanaka. Saka, tsvakurudzo dzakawanda dzakaitwa pa "IN-GAAS APD photodetector single photon detector" dzakaitwa munyika nekunze kwenyika.

Vaongorori vanobva kuYunivhesiti yeMilan muItaly vakatanga kugadzira modhi ine mativi maviri yekutevedzera maitiro enguva pfupi ephoton imwe chetechinhu chinoona mafashamo emvuramuna 1997, uye vakapa mhedzisiro yekuenzanisa kwenhamba yehunhu hwenguva pfupi hwechinhu chimwe chete che photon avalanche photodetector. Zvadaro muna 2006, vaongorori vakashandisa MOCVD kugadzira geometric yakarongwa.Chinoongorora mufananidzo cheInGaAs APDdetector yephoton imwe chete, iyo yakawedzera kushanda kwekuona kwephoton imwe chete kusvika 10% nekuderedza layer reflective uye kuwedzera simba remagetsi panzvimbo yakasiyana. Muna 2014, nekuvandudza mamiriro ekupararira kwezinc uye kugadzirisa chimiro chevertical, detector yephoton imwe chete ine kushanda kwepamusoro kwekuona, kusvika ku30%, uye inowana timing jitter inosvika 87 ps. Muna 2016, SANZARO M nevamwe vake vakabatanidza InGaAs APD photodetector single-photon detector ine monolithic integrated resistor, vakagadzira compact single-photon counting module yakavakirwa pa detector, uye vakapa nzira ye hybrid quench yakaderedza zvakanyanya avalanche charge, nokudaro ichideredza post-pulse uye optical crosstalk, uye ichideredza timing jitter kusvika 70 ps. Panguva imwe chete, mamwe mapoka ekutsvagisa akaitawo tsvakiridzo paInGaAs APDmudziyo wekuona fotoImwe chete yekuona mafotoni. Semuenzaniso, Princeton Lightwave yakagadzira InGaAs/InPAPD imwe chete yekuona mafotoni ine chimiro cheplanar ndokuishandisa mukutengeserana. Shanghai Institute of Technical Physics yakaedza mashandiro eAPD photodetector ine chimiro chesingle-photon ichishandisa kubviswa kwe zinc deposits uye capacitive balanced gate pulse mode ine dark count ye3.6 × 10 ⁻⁴/ns pulse pa pulse frequency ye1.5 MHz. Joseph P nevamwe vake vakagadzira mesa structure InGaAs APD photodetector imwe chete yekuona mafotoni ine wider bandgap, uye vakashandisa InGaAsP sechinhu chinonyudza mafotoni kuti vawane dark count yakaderera pasina kukanganisa kushanda kwekuona.

Nzira yekushanda yeInGaAs APD photodetector single photon detector i free operation mode, kureva kuti, APD photodetector inofanira kudzima peripheral circuit mushure mekunge avalanche yaitika, uye kupora mushure mekudzima kwenguva yakati. Kuti kuderedze kukanganiswa kwenguva yekunonoka kwekudzima, yakakamurwa kuita mhando mbiri: Imwe ndeyekushandisa passive kana active quenching circuit kuti iwane quenching, senge active quenching circuit inoshandiswa neR Thew, nezvimwewo. Mufananidzo (a), (b) idhayagiramu yakapfava ye electronic control uye active quenching circuit uye kubatana kwayo neAPD photodetector, iyo yakagadzirwa kuti ishande mu gated kana free running mode, zvichideredza zvakanyanya dambudziko re post-pulse raive risati raitwa. Uyezve, kugona kwekuona pa1550 nm i10%, uye mukana we post-pulse unoderedzwa kusvika pasi pe1%. Chechipiri ndechekuona quenching nekukurumidza uye kupora nekudzora huwandu hwe bias voltage. Sezvo zvisingatsamiri pakudzora kweavalanche pulse, nguva yekunonoka yekudzima inodzikira zvakanyanya uye kushanda kwe detector kunovandudzwa. Semuenzaniso, LC Comandar nevamwe vanoshandisa gated mode. Gated single-photon detector yakavakirwa paInGaAs/InPAPD yakagadzirwa. Kushanda kwe single-photon detection kwaive pamusoro pe55% pa1550 nm, uye mukana we post-pulse we7% wakawanikwa. Pachikonzero ichi, University of Science and Technology of China yakagadzira liDAR system ichishandisa multi-mode fiber panguva imwe chete yakabatana ne free-mode InGaAs APD photodetector single-photon detector. Midziyo yekuedza inoratidzwa muMufananidzo (c) na (d), uye kuonekwa kwemakore akawanda ane urefu hwe12 km kunoitika ne resolution yenguva ye1 s uye resolution yenzvimbo ye15 m.