Chii chinonzi PIN photodetector

Chii chinonziChinoongorora mufananidzo chePIN

Photodetector inyanzvi inoongorora zvakanyanyamudziyo we semiconductor photoniciyo inoshandura chiedza kuita magetsi nekushandisa photoelectric effect. Chikamu chayo chikuru iphotodiode (PD photodetector). Rudzi rwakajairika runosanganisira PN junction, electrode leads inoenderana uye chubhu shell. Ine unidirectional conductivity. Kana voltage yekumberi yaiswa, diode inotungamira; kana voltage yekumashure yaiswa, diode inodzima. PD photodetector yakafanana nediode yesemiconductor yakajairika, kunze kwekutiChinoongorora mufananidzo chePDinoshanda pasi pemagetsi ekudzokera shure uye inogona kuburitswa pachena. Inoiswa nepahwindo kana kuti nefiber ye optical, zvichiita kuti chiedza chisvike pachikamu chemuchina chinonzwa chiedza.

Zvichakadaro, chinhu chinonyanya kushandiswa muPD photodetector haisi PN junction asi PIN junction. Kana tichienzanisa nePN junction, PIN junction ine imwe I layer pakati. I layer i layer yeN-type semiconductor ine doping concentration yakaderera. Nekuti iine inenge Intrinsic semiconductor ine concentration yakaderera, inonzi I layer. Layer I yakakora uye inenge inotora nzvimbo yese ye depletion. Ruzhinji rwe incident photons dzinonyudzwa muI layer uye dzinogadzira ma electron-hole pairs (photogenerated carriers). Kumativi ese eI layer kune P-type neN-type semiconductors dzine doping concentrations yakawanda kwazvo. P neN layer dzakatetepa zvikuru, dzichinyudza chikamu chidiki che incident photons uye dzichigadzira nhamba diki ye photogenerated carriers. Chimiro ichi chinogona kukurumidzisa zvakanyanya kumhanya kwekupindura kwe photoelectric effect. Zvisinei, nzvimbo yakafara kwazvo ye depletion ichawedzera nguva ye drift ye photogenerated carriers munzvimbo ye depletion, izvo zvinotungamira ku response inononoka. Nokudaro, upamhi hwenzvimbo ye depletion hunofanira kusarudzwa zvine musoro. Kumhanya kwekupindura kwePIN junction diode kunogona kuchinjwa nekudzora upamhi hwenzvimbo yekuderera.

PIN photodetector inyanzvi yekuona mwaranzi yakanyatsogadzirwa ine simba rakanaka uye inoshanda zvakanaka pakuona. Inogona kuyera mhando dzakasiyana dzesimba remwaranzi nemazvo uye kuita kuti ikurumidze kupindura uye ishande zvakanaka. Basa remudziyo wekuona fotondeyekushandura masaini maviri emwenje mushure mekushandiswa kwefrequency kuita masaini emagetsi, kubvisa ruzha rwekuwedzera rwechiedza cheoscillator chemuno, kuwedzera chiratidzo chepakati pefrequency, uye kuvandudza chiyero chesignal-to-noise. MaPIN photodetector ane chimiro chiri nyore, nyore kushandisa, kunzwa kwakanyanya, kuwedzera kwakanyanya, bandwidth yakakwirira, ruzha rwakaderera, uye kugona kwakasimba kwekudzivirira kukanganiswa. Anogona kushanda zvakadzikama munzvimbo dzakasiyana-siyana dzakaoma uye anonyanya kushandiswa mukuona chiratidzo che lidar chekuyera mhepo.