Abstract: A broadband near-IR photodetector based on a large-area G12180-250A InGaAs photodiode (Hamamatsu) with a 5-mm-diameter photosensitive area was developed and tested. It is designed for detecting the IR luminescence of singlet oxygen. A circuit for signal amplification is assembled on the basis of broadband low-noise operational amplifiers with the subsequent filtering of a signal with an adjustable passband f varied from 15 to 600 kHz, thus allowing one to obtain a time resolution of better than 1 µs, a sensitivity level of 10 7 –10 9 V/W, and a noise equivalent power NEP [W/Hz 1/2 ] ≈ 1.4 × 10 –14 λ –1 [µm] f [kHz] in a frequency band of 15–600 kHz.
|Журнал||Instruments and Experimental Techniques|
|Состояние||Опубликовано - 1 апр. 2019|