Chii chinonzi PIN photodetector

Chii chinonzi aPIN photodetector

A photodetector inonyatso nzwisisasemiconductor photonic deviceiyo inoshandura chiedza kuita magetsi nekushandisa photoelectric effect. Chinhu chayo chikuru ndicho photodiode (PD photodetector). Rudzi rwakajairika runoumbwa nePN junction, inoenderana electrode lead uye chubhu shell. Iine unidirectional conductivity. Kana mhepo yepamberi inoshandiswa, diode inoitisa; kana reverse voltage inoshandiswa, diode inocheka. PD photodetector yakafanana neyakajairika semiconductor diode, kunze kweiyoPD photodetectorinoshanda pasi pe reverse voltage uye inogona kuburitswa. Iyo yakarongedzwa nepahwindo kana optical fiber yekubatanidza, ichibvumira mwenje kuti isvike kune photosensitive chikamu chemudziyo.

Zvichakadaro, iyo inonyanya kushandiswa chikamu muPD photodetector haisi iyo PN junction asi iyo PIN junction. Kuenzaniswa nePN junction, iyo PIN junction ine yekuwedzera I layer pakati. Iyo I layer ndeye N-type semiconductor ine yakaderera doping concentration. Nekuti inenge iri Intrinsic semiconductor ine yakaderera concentration, inonzi I layer. Layer I yakakora uye inenge inogara munzvimbo yese yekuderera. Iyo yakawanda yakawanda yemafotoni echiitiko anonyudzwa muI layer uye anogadzira maelectron-hole pairs (photogenerated carriers). Pamativi ese eiyo I layer kune P-mhando uye N-mhando semiconductors ine yakanyanya kukwirisa doping. Iwo P neN akatetepa zvakanyanya, anotora chikamu chidiki kwazvo chechiitiko mafotoni uye achigadzira nhamba diki yemapikicha anotakura. Ichi chimiro chinogona kukurumidzira zvakanyanya kumhanya kwekupindura kweiyo photoelectric effect. Nekudaro, nzvimbo yakawandisa yekuderera inorebesa nguva yekudonha yevatakuri vepikicha munzvimbo yekuderera, izvo zvinotungamira kune inononoka mhinduro. Nokudaro, hupamhi hwenharaunda yekuderedza hunofanira kusarudzwa zvine musoro. Iyo yekupindura kumhanya kwePIN junction diode inogona kushandurwa nekudzora hupamhi hwenzvimbo yekuderera.

Iyo PIN photodetector ndeye yakakwirira-chaiyo radiation detector ine yakanakisa kugadzirisa kwesimba uye kugona kwekuona. Inogona kuyera nenzira kwayo marudzi akasiyana-siyana emagetsi emagetsi uye kuwana mhinduro nekukurumidza uye kugadzikana kwakanyanya kuita. Basa rephotodetectorndeye kushandura masaini maviri emagetsi emwenje mushure mekurova frequency kuita masaini emagetsi, kubvisa yakawedzera kusimba ruzha rwenzvimbo oscillator mwenje, kusimudzira yepakati frequency chiratidzo, uye kugadzirisa chiratidzo-ku-ruzha reshiyo. PIN photodetectors inoratidzira chimiro chakareruka, nyore kushandisa, kunzwisiswa kwepamusoro, kuwana kwakakwira, bandwidth yakakwira, ruzha rwakaderera, uye kugona kwakasimba kwekudzivirira kupindira. Iwo anogona kushanda akadzikama munzvimbo dzakasiyana-siyana dzakaoma uye anonyanya kushandiswa mukuyera kwemhepo kuyerwa kwe lidar chiratidzo.