Ihe nchọpụta foto bụ ngwaọrụ na-agbanwe akara ọkụ ka ọ bụrụ akara ọkụ eletrik. N'ime fotodetector nke semiconductor, onye na-ebu foto nwere obi ụtọ site na foton merenụ na-abanye na sekit dịpụrụ adịpụ n'okpuru voltaji eleda anya nke etinyere ma mepụta foto nke nwere ike ịtụnye. Ọbụlagodi na nzaghachi kacha elu, fotodiode pin nwere ike mepụta ụzọ abụọ nke oghere eletrọn kacha, nke bụ ngwaọrụ na-enweghị uru dị n'ime. Maka nzaghachi ka ukwuu, enwere ike iji avalanche photodiode (apd) mee ihe.
Mmetụta mmụba nke apd na fotocurrent dabere na mmetụta nkukota ionization. N'okpuru ọnọdụ ụfọdụ, igwe eletrọn na oghere nwere ike nweta ume zuru oke iji kpokọta ọnụ na lattice iji mepụta ụzọ abụọ oghere eletrọn ọhụrụ. Usoro a bụ mmeghachi omume yinye, nke mere na ụzọ abụọ nke oghere eletrọn na-emepụta site na mmịnye ọkụ nwere ike imepụta ọnụ ọgụgụ dị ukwuu nke oghere eletrọn wee mepụta nnukwu foto nke abụọ. Ya mere, apd nwere nzaghachi dị elu yana uru dị n'ime, nke na-eme ka mgbama na mkpọtụ ụda nke ngwaọrụ ahụ dịkwuo mma. A ga-eji apd eme ihe n'ime ogologo oge ma ọ bụ sistemụ nkwurịta okwu fiber optical nwere oke ndị ọzọ na ike ngwa anya enwetara. Ka ọ dị ugbu a, ọtụtụ ndị ọkachamara ngwa ngwa na-enwe nchekwube maka atụmanya nke apd.
Rofea n'onwe ya mepụtara fotodetector agbakwunyere fotodiode na sekit amplifier dị ala, ebe ọ na-enye ngwaahịa dị iche iche, maka ndị ọrụ nyocha sayensị Na-enye ọrụ nhazi ngwaahịa dị mma, nkwado teknụzụ na ọrụ ire ere. Ahịrị ngwaahịa dị ugbu a na-agụnye: fotodetector mgbaàmà analog nwere mmụba, nweta fotodetector na-agbanwe agbanwe, onye na-ahụ maka foto dị elu, onye na-achọpụta ahịa snow (APD), onye na-achọpụta nguzozi, wdg.
Njirimara
Spectral nso: 320-1000nm,850-1650nm,950-1650nm,1100-1650nm,1480-1620nm
3dBbandth: 200MHz-50GHz
Ngwakọta eriri ngwa anya 2.5Gbps
Ụdị modulator
3dBbandwidt:
200MHz, 1GHz,10GHz,20GHz,50GHz
Ngwa
Nchọpụta pulse ngwa anya dị elu
Nkwukọrịta ngwa anya dị elu
Microwave njikọ
Brillouin Optical Fiber Sensing System
Oge nzipu: Jun-21-2023