NDLI: Microwave signal-to-noise performance of CdSe bulk photoconductive detectors

Content Provider	IEEE Xplore Digital Library
Author	DiDomenico Jr., M. Anderson, L.K.
Copyright Year	1963
Abstract	The microwave signal and noise response of CdSe bulk photoconductive detectors have been measured and compared with that of a high-speed junction photodiode. The signal measurements were made with CW intensity modulated light at 3000 Mc. Excellent quantitative agreement was obtained between the simple photoconductivity theory of direct light demodulation and experiment. At low optical intensities, the observed noise can be accounted for within the framework of existing theories of generation-recombination (GR) noise when the effects of electron retrapping are accounted for. At high optical intensities, nonlinear deviations are observed which can be accounted for only qualitatively. The results demonstrate clearly that such a photoconductor, when used as a simple quantum counter, will always be thermal rather than GR noise limited. Measurements show that the photoconductor as it is usually used in a nonoptimum configuration is some 50 db less sensitive than a good photodiode.
Sponsorship	IEEE Publication
Starting Page	815
Ending Page	822
Page Count	8
File Size	764751
File Format	PDF
ISSN	00189219
Volume Number	52
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1964-07-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photoconductivity Optical noise Detectors Photodiodes Optical modulation Electron optics High speed optical techniques Nonlinear optics Optical sensors Noise generators
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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