Ihe nchọpụta foto InGaAs nke otu foton

Otu foton nke otuNchọpụta foto InGaAs

Site na mmepe ngwa ngwa nke LiDAR,nchọpụta ìhèteknụzụ na teknụzụ dịgasị iche iche eji eme ihe maka teknụzụ nlele ụgbọala akpaka nwekwara ihe achọrọ dị elu, mmetụta na mkpebi oge nke ihe nchọpụta ejiri na teknụzụ nchọpụta obere ọkụ ọdịnala enweghị ike igbo mkpa ndị dị mkpa. Otu foton bụ obere nkeji ike nke ìhè, ihe nchọpụta nwere ikike nchọpụta otu foton bụ ngwaọrụ ikpeazụ nke nchọpụta obere ọkụ. Ma e jiri ya tụnyere InGaAsihe nchọpụta foto APD, ihe nchọpụta foto otu-photon dabere na InGaAs APD photodetector nwere ọsọ nzaghachi dị elu, mmetụta na arụmọrụ dị elu. Ya mere, e meela usoro nyocha na ihe nchọpụta foto otu-photon IN-GAAS APD photodetector n'ụlọ na mba ofesi.

Ndị nchọpụta si Mahadum Milan dị na Itali buru ụzọ mepụta ihe nlereanya nwere akụkụ abụọ iji mee ka àgwà nwa oge nke otu foton dị mkpụmkpụ.ihe nchọpụta foto nke nnukwu ebili mmirina 1997, ma nye nsonaazụ ngụkọ nke njirimara nwa oge nke otu fotodetector foton avalanche. Mgbe ahụ na 2006, ndị nchọpụta jiri MOCVD kwadebe geometric planar.Nchọpụta foto InGaAs APDotu ihe nchọpụta foton, nke mere ka arụmọrụ nchọpụta otu foton dịkwuo elu ruo 10% site na ibelata oyi akwa na-egosipụta ma na-eme ka ubi eletriki dịkwuo mma na njikọ dị iche iche. Na 2014, site n'ịkwalite ọnọdụ mgbasa zinc na imeziwanye nhazi kwụ ọtọ, ihe nchọpụta otu foton nwere arụmọrụ nchọpụta dị elu, ruo 30%, ma nweta jitter oge nke ihe dị ka 87 ps. Na 2016, SANZARO M et al. jikọtara ihe nchọpụta foton InGaAs APD otu foton detector na resistor monolithic, chepụtara modulu ịgụta otu foton dị obere dabere na ihe nchọpụta ahụ, ma tụọ aro usoro quench ngwakọ nke belatara chajị oke mmiri, si otú a belata post-pulse na optical crosstalk, ma belata timing jitter ruo 70 ps. N'otu oge ahụ, otu nyocha ndị ọzọ emeela nyocha na InGaAs APDihe nchọpụta fotoihe nchọpụta foton otu. Dịka ọmụmaatụ, Princeton Lightwave emepụtala ihe nchọpụta foton otu InGaAs/InPAPD nwere nhazi planar ma tinye ya n'ọrụ azụmahịa. Shanghai Institute of Technical Physics nwalere arụmọrụ foton otu-photon nke APD photodetector site na iji mwepụ nke zinc deposits na ọnọdụ capacitive balanced gate pulse mode na ọnụọgụ gbara ọchịchịrị nke 3.6 × 10 ⁻⁴/ns pulse na ugboro pulse nke 1.5 MHz. Joseph P et al. chepụtara nhazi mesa InGaAs photodetector otu photon detector nwere bandgap sara mbara, ma jiri InGaAsP dị ka ihe na-amịkọrọ ihe iji nweta ọnụ ọgụgụ gbara ọchịchịrị dị ala na-enweghị mmetụta arụmọrụ nchọpụta.

Ụdị ọrụ nke InGaAs APD photodetector otu photon detector bụ ụdị ọrụ efu, ya bụ, APD photodetector kwesịrị imenyụ sekit dị n'akụkụ mgbe oke mmiri gasịrị, ma gbakee mgbe ọ gbasịrị ruo oge ụfọdụ. Iji belata mmetụta nke oge igbu oge, a na-ekewa ya n'ụdị abụọ: Otu bụ iji sekit offenching passive ma ọ bụ active quenching iji nweta quenching, dị ka sekit offenching active nke R Thew ji, wdg. Foto (a), (b) bụ eserese dị mfe nke njikwa eletrọniki na sekit offenching active na njikọ ya na APD photodetector, nke emepụtara iji rụọ ọrụ na ọnọdụ ịgba ọsọ ma ọ bụ n'efu, nke na-ebelata nsogbu post-pulse nke a na-aghọtabeghị mbụ. Ọzọkwa, arụmọrụ nchọpụta na 1550 nm bụ 10%, a na-ebelatakwa ohere nke post-pulse ka ọ bụrụ ihe na-erughị 1%. Nke abụọ bụ imezu quenching ngwa ngwa na mgbake site na ijikwa ọkwa nke voltaji bias. Ebe ọ bụ na ọ dabereghị na njikwa nzaghachi nke pulse avalanche, oge igbu oge nke imenyụ ọkụ na-ebelata nke ukwuu ma na-eme ka arụmọrụ nchọpụta nke ihe nchọpụta dịkwuo mma. Dịka ọmụmaatụ, LC Comandar na ndị otu ya na-eji ụdị gated. E kwadebere ihe nchọpụta otu-photon nke dabere na InGaAs/InPAPD. Arụmọrụ nchọpụta otu-photon karịrị 55% na 1550 nm, e mekwara ohere nke 7% mgbe pulse gasịrị. N'ihi nke a, Mahadum Sayensị na Teknụzụ nke China guzobere sistemụ liDAR site na iji eriri ụdị dị iche iche n'otu oge yana ihe nchọpụta otu-photon InGaAs APD free-mode. E gosiri akụrụngwa nnwale ahụ na Foto (c) na (d), a na-emekwa nchọpụta nke ọtụtụ ígwé ojii nwere elu nke 12 km site na mkpebi oge nke 1 s na mkpebi oghere nke 15 m.