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Proceedings Paper

10-14W weak light readout for quantum photodetector array at 300K
Author(s): Wei Wang; Shuhua Zhang; Haidong Lu; Peng Xu; Fangmin Guo
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Paper Abstract

The novel photodetector array has a specific inner multiplication mechanism at low bias voltage in the weak light environment. High current gains are achieved and accompanied by extremely low dark currents. The photocurrent spectrum of the photodetector shows excellent light absorption in visible spectrum (VIS) and near infrared spectrum (NIRS), ranging from 500nm up to 900nm. Capacitor feedback trans-impedance amplifier (CTIA) readout circuit has been designed to acquire the integration voltage of photocurrent with wide wavelength range. Weak light experiments have measured the response voltage is 4mV@0.01pW illumination and 100μs integration time at 300K. The responsivity reaches 4×1011V/W. A high sensitivity spectrometer based on the photodetector array and readout circuit is developing and will be applied to weak signal detection in the fields of the environmental monitoring and biomedicine science.

Paper Details

Date Published: 15 October 2015
PDF: 6 pages
Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 96741Z (15 October 2015); doi: 10.1117/12.2199825
Show Author Affiliations
Wei Wang, East China Normal Univ. (China)
Shuhua Zhang, East China Normal Univ. (China)
Haidong Lu, East China Normal Univ. (China)
Peng Xu, East China Normal Univ. (China)
Fangmin Guo, East China Normal Univ. (China)

Published in SPIE Proceedings Vol. 9674:
AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Haimei Gong; Nanjian Wu; Yang Ni; Weibiao Chen; Jin Lu, Editor(s)

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