INVESTIGATION OF PULSED BIAS ON COOLED MERCURY-CADMIUM-TELLURIDE PHOTOCONDUCTIVE INFRARED DETECTORS

Authors
  1. Larochelle, V.
  2. Cruickshank, J.M.
  3. Bonnier, D.
  4. Vincent, D.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The application of a pulsed bias to a photoconductive infrared HgCdTe detector was investigated as a possible means for increasing the sensitivity of receiver modules for CO2 laser rangefinders. For this investigation, it was assumed that the sensitivity of a receiver module using a HgCdTe photoconductive detector would increase with the detector bias current up to a limit determined largely by the temperature rise in the detector element caused by electrical power dissipation. A pulsed bias approach could allow higher bias currents to be applied with less increase in the detector temperature. In this investigation, the sensitivity of the receiver was compared at the different pulsed bias conditions by examining the signal-to-noise ratio at the output of the receiver. This signal-to-noise ratio was calculated from the broadband rms noise and measurements of the amplitude of TEA-CO2 laser pulse returns. TRUNCATED
Date of publication
01 Jan 1990
Number of Pages
12
Reprinted from
Infrared Phys, vol 31, no 2, 1991, p 183-194
DSTKIM No
91-01634
CANDIS No
68838
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: