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Optical Engineering

Comparison between super low ionization ratio and reach through avalanche photodiode structures
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Paper Abstract

Avalanche photodiodes (APD) are solid state quantum detectors suitable for low level light detection in the visible and near infrared regions. These devices are commercially available from many manufacturers and are fabricated using several different solid state structures. In this paper a comparison between the well developed reach through structure (RTS) aPd and the relatively newer super low ionization ratio, k, (SLIK) APD structure will be discussed. The comparison is based on the experimental characterization of two APDs with these structures. The characterization setup and experiments will be described which include the calibration of the APDs, temperature response, bias voltage response, and noise measurements including noise-equivalent-power and detectivity D*. For this comparison the selected RTS APD is the EG&G C30955E, currently used by the lidar atmospheric sensing experiment (LASE) instrument. The selected SLIK ApD is the EG&G C30649E, which is proposed for LASE development. The characterization experiments where done in order to develop an advanced atmospheric water vapor differential absorption lidar detection system.

Paper Details

Date Published: 1 October 2000
PDF: 9 pages
Opt. Eng. 39(10) doi: 10.1117/1.1308925
Published in: Optical Engineering Volume 39, Issue 10
Show Author Affiliations
Tamer F. Refaat, Old Dominion Univ. (United States)
Gary E. Halama, NASA Langley Research Ctr. (United States)
Russell J. De Young, NASA Langley Research Ctr. (United States)

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