He wehewehe pōkole o ka photodiode avalanche

He wehewehe pōkole nophotodiode avalanche
He mea semiconductor koʻikoʻi loa ka photodiode avalanche e hoʻololi i ka mālamalama i nā hōʻailona uila ma o ka hopena photovoltaic. ʻAʻole e like me ke kuʻunanā photodiode, ua hoʻolālā ʻia ka APD e hana ma lalo o nā voltages bias reverse kiʻekiʻe kokoke i ka voltage breakdown, no laila e hoʻokō ai i ka hoʻonui kūloko o ka photocurrent ma o ka hopena breakdown avalanche. Ke hoʻohālikelike ʻia me nā photodiodes maʻamau, hiki i kēia ʻano loaʻa kūloko ke hiki i ka APD keMea ʻike kiʻinā wahi liʻiliʻi o ke kukui, e hopena ana i kahi hoʻomaikaʻi nui ʻana i ka lakio signal-to-noise.
Mai kahi hiʻohiʻona hana,Mea ʻike kiʻi APDhiki ke manaʻo ʻia he semiconductor analog o nā paipu photomultiplier (PMT), ʻoiai he ʻokoʻa kā lākou mau loina hana. Ke hoʻohālikelike ʻia me nā ʻenehana ʻike photoelectric ʻē aʻe e like me PMT, he nui nā pono o APD. ʻAʻole lākou i ʻike nui i nā kahua magnetic, hāʻawi i ka pono quantum kiʻekiʻe no nā hōʻailona kukui hoʻokomo, a koi i nā voltages hana haʻahaʻa. Eia kekahi, ke hoʻohālikelike ʻia me nā koho ʻē aʻe e pili ana i ka paipu, hōʻike pinepine ʻo APD Photodetector i ke kūpaʻa kiʻekiʻe a me nā kumukūʻai haʻahaʻa.
ʻO ka photodiode avalanche kahi ʻenehana koʻikoʻi i ka optoelectronics hou, e hoʻopili ana i ka hakahaka ma waena o nā photodiodes kuʻuna a me nā paipu photomultiplier. Hiki iā lākou ke hāʻawi i ka loaʻa kūloko ma o ka hopena avalanche, e hiki ai ke ʻike i ka ʻike kiʻekiʻe me ka mālama ʻana i ka paʻa a me ka compactness o nā mea semiconductor. ʻO ka hoʻomohala mau ʻana o ka ʻenehana APD, me ka holomua ʻana i nā mea, ka hoʻolālā kūkulu, a me nā ʻano hana, ke hoʻonui nei i kāna hana a me ka laulā noi. ʻO nā holomua hou loa i nā huahana bandwidth loaʻa, nā hoʻolālā kūikawā no nā pae wavelength kikoʻī, a me nā hoʻomaikaʻi ʻana i nā ʻano walaʻau e hoʻokuke ana i nā palena o kēia mau mea hana. I ka holomua ʻana o ka noiʻi, hiki iā mākou ke manaʻo i ka hoʻomaʻemaʻe hou ʻana o ka ʻenehana APD Photodetector, ʻoi aku hoʻi ma nā wahi e like me ka hōʻemi ʻana i ka walaʻau, ka hoʻonui ʻana i ka bandwidth, ka hoʻomaikaʻi ʻana i ka ʻike, a me ka hoʻonui ʻana i ka uhi ʻana. E hoʻomau kēia mau hoʻomohala i ka hana ʻana iā APD i mea pono ʻole i nā kahua makua e like me ke kelepona a ma nā wahi e kū mai ana e like me ka ʻenehana quantum, nā ʻōnaehana autonomous, a me nā mea hana ʻepekema holomua.

Hōʻike ka photodiode avalanche (APD Photodetector) i kahi holomua koʻikoʻi i ka ʻenehana ʻike optical, e hāʻawi ana i ka ʻike kiʻekiʻe a me kahi ʻano loaʻa kūloko, e lilo ia i mea waiwai nui no nā noi e pono ai ka ʻike ʻana i nā hōʻailona mālamalama nāwaliwali.