He aha ka mea ʻike kiʻi PIN

He aha kahiMea ʻike kiʻi PIN

He mea ʻike maka koʻikoʻi loa ka photodetectormea hana photonic semiconductore hoʻololi ana i ka mālamalama i uila ma ka hoʻohana ʻana i ka hopena photoelectric. ʻO kāna ʻāpana nui ka photodiode (PD photodetector). ʻO ke ʻano maʻamau i haku ʻia me kahi PN junction, nā alakaʻi electrode like a me kahi pūpū paipu. Loaʻa iā ia ka conductivity unidirectional. Ke hoʻopili ʻia kahi voltage mua, alakaʻi ka diode; ke hoʻopili ʻia kahi voltage hope, ʻoki ka diode. Ua like ka PD photodetector me kahi diode semiconductor maʻamau, koe wale nō kēlāMea ʻike kiʻi PDhana ma lalo o ke ana hoʻohuli a hiki ke hōʻike ʻia. Hoʻopili ʻia ia ma o ka puka makani a i ʻole ka pilina fiber optical, e ʻae ana i ka mālamalama e hiki i ka ʻāpana photosensitive o ka hāmeʻa.

I kēia manawa, ʻo ka ʻāpana i hoʻohana nui ʻia ma ka PD photodetector ʻaʻole ia ka PN junction akā ʻo ka PIN junction. Ke hoʻohālikelike ʻia me ka PN junction, aia ka PIN junction i kahi papa I hou ma waenakonu. ʻO ka papa I kahi papa o ka semiconductor ʻano N me kahi haʻahaʻa loa o ka doping. No ka mea, he semiconductor Intrinsic kokoke ia me kahi haʻahaʻa haʻahaʻa, ua kapa ʻia ʻo ia ʻo ka papa I. He mānoanoa iki ka Papa I a kokoke e noho i ka ʻāpana depletion holoʻokoʻa. Hoʻopili ʻia ka hapa nui o nā photons incident i loko o ka papa I a hoʻopuka i nā hui electron-hole (nā mea lawe photogenerated). Ma nā ʻaoʻao ʻelua o ka papa I he mau semiconductors ʻano P a me N me nā doping kiʻekiʻe loa. He lahilahi loa nā papa P a me N, e omo ana i kahi hapa liʻiliʻi loa o nā photons incident a hoʻopuka i kahi helu liʻiliʻi o nā mea lawe photogenerated. Hiki i kēia ʻano ke hoʻolalelale nui i ka wikiwiki o ka pane o ka hopena photoelectric. Eia nō naʻe, ʻo kahi ʻāpana depletion ākea loa e hoʻolōʻihi i ka manawa drift o nā mea lawe photogenerated i ka ʻāpana depletion, kahi e alakaʻi ai i kahi pane lohi. No laila, pono e koho pono ʻia ka laulā o ka ʻāpana depletion. Hiki ke hoʻololi ʻia ka wikiwiki o ka pane o ka diode junction PIN ma ka kaohi ʻana i ka laulā o ka ʻāpana depletion.

ʻO ka mea ʻike kiʻi PIN kahi mea ʻike radiation pololei me ka hoʻonā ikehu maikaʻi loa a me ka pono o ka ʻike ʻana. Hiki iā ia ke ana pololei i nā ʻano ikehu radiation like ʻole a hoʻokō i ka pane wikiwiki a me ka hana kūpaʻa kiʻekiʻe. ʻO ka hana o kamea ʻike kiʻiʻO ia ke hoʻololi i nā hōʻailona nalu māmā ʻelua ma hope o ke alapine kuʻi i nā hōʻailona uila, hoʻopau i ka walaʻau ikaika hou o ke kukui oscillator kūloko, hoʻonui i ka hōʻailona alapine waena, a hoʻomaikaʻi i ka lakio signal-to-noise. Loaʻa i nā photodetectors PIN kahi ʻano maʻalahi, maʻalahi o ka hoʻohana, ʻike kiʻekiʻe, loaʻa kiʻekiʻe, bandwidth kiʻekiʻe, walaʻau haʻahaʻa, a me ka hiki ke anti-interference ikaika. Hiki iā lākou ke hana paʻa i nā ʻano ʻino like ʻole a hoʻohana nui ʻia i ka ana ʻana o ka makani lidar signal detection.