Kodi PIN photodetector ndi chiyani

Kodi aPin photodetector

Photodetector ndiyomwe imakhala yovuta kwambirisemiconductor photonic chipangizoamene amasintha kuwala kukhala magetsi pogwiritsa ntchito photoelectric effect. Chigawo chake chachikulu ndi photodiode (PD photodetector). Mtundu wodziwika kwambiri umapangidwa ndi mphambano ya PN, ma elekitirodi oyendera limodzi ndi chipolopolo cha chubu. Ili ndi unidirectional conductivity. Pamene magetsi akutsogolo akugwiritsidwa ntchito, diode imayendetsa; Pamene magetsi akugwiritsidwa ntchito, diode imadula. PD photodetector ndi yofanana ndi semiconductor diode wamba, kupatulapoPD Photodetectorimagwira ntchito pansi pa reverse voltage ndipo imatha kuwululidwa. Amapakidwa kudzera pa zenera kapena optical fiber connection, zomwe zimathandiza kuti kuwala kufikire mbali ya chipangizocho.

Pakadali pano, gawo lomwe limagwiritsidwa ntchito kwambiri mu PD photodetector si njira ya PN koma PIN. Poyerekeza ndi mphambano ya PN, PIN yolumikizira ili ndi gawo la I lowonjezera pakati. Wosanjikiza I ndi wosanjikiza wa semiconductor wamtundu wa N wokhala ndi ndende yotsika kwambiri ya doping. Chifukwa ndi pafupifupi Intrinsic semiconductor yokhala ndi ndende yotsika, imatchedwa I wosanjikiza. Layer I ndi wokhuthala ndipo pafupifupi amatenga gawo lonse la kuchepa kwa madzi. Zambiri zamafotoni a zochitika zimalowetsedwa mu wosanjikiza wa I ndikupanga ma electron-hole pairs (zonyamula zithunzi). Kumbali zonse za I wosanjikiza pali P-mtundu ndi N-mtundu semiconductors okhala ndi kuchuluka kwa doping. Zigawo za P ndi N ndizoonda kwambiri, zomwe zimatengera gawo laling'ono kwambiri la mafotoni a zochitika ndikupanga zonyamulira zochepa zopanga zithunzi. Kapangidwe kameneka kamatha kufulumizitsa kwambiri kuthamanga kwa mayankho a photoelectric effect. Komabe, chigawo chochepa kwambiri chidzatalikitsa nthawi yowonongeka kwa onyamula zithunzi m'dera la kuchepa, zomwe m'malo mwake zimabweretsa kuyankha pang'onopang'ono. Choncho, m'lifupi mwa chigawo chochepetsera kuyenera kusankhidwa moyenerera. Liwiro lakuyankhidwa kwa diode ya PIN yophatikizira imatha kusinthidwa poyang'anira m'lifupi mwa dera lakutha.

Pin photodetector ndi chowunikira cholondola kwambiri cha radiation chokhala ndi mphamvu yabwino kwambiri komanso kuzindikira bwino. Imatha kuyeza molondola mitundu yosiyanasiyana ya mphamvu zama radiation ndikukwaniritsa kuyankha mwachangu komanso kukhazikika kwapamwamba. Ntchito yaPhotodetectorndiko kutembenuza zizindikiro ziwiri zowunikira pambuyo pa kugunda kwafupipafupi kukhala zizindikiro zamagetsi, kuthetsa phokoso lowonjezera la kuwala kwa oscillator wamba, kupititsa patsogolo chizindikiro chapakati, ndikuwongolera chiŵerengero cha ma signal-to-noise. PIN photodetectors imakhala ndi mawonekedwe osavuta, kugwiritsa ntchito mosavuta, kukhudzidwa kwakukulu, kupindula kwakukulu, bandwidth yapamwamba, phokoso lochepa, ndi mphamvu zotsutsana ndi kusokoneza. Amatha kugwira ntchito mokhazikika m'malo ovuta ndipo amagwiritsidwa ntchito makamaka pozindikira chizindikiro cha lidar.