Title :
Detector performance studies for CO2 laser heterodyne systems
Author :
Wilson, D.J. ; Constant, G.D.J. ; Foord, R. ; Vaughan, J.M.
Author_Institution :
R. Signals & Radar Establ., Great Malvern, UK
Abstract :
The authors discuss experimental results obtained with Joule-Thomson cooled CMT photodiodes, in a variety of systems and applications. Two types of study have been conducted, firstly an evaluation of a range of detectors on the laboratory bench, and secondly, performance studies on detectors installed in different lidar equipments. It is concluded that a heterodyne detector/amplifier should have the following characteristics: wide bandwidth with flat response; high quantum efficiency over the range of operational frequencies and power levels; well matched bias supply and amplifier; be physically robust, with a long stable life; and reproducible technology
Keywords :
II-VI semiconductors; cadmium compounds; carbon compounds; gas lasers; mercury compounds; optical radar; photodetectors; photodiodes; CO2; Cd Hg Te; Joule-Thomson cooled CMT photodiodes; heterodyne systems; laser radar; lidar; noise equivalent power; photodetector; waveguide laser;
Conference_Titel :
Advanced Infrared Detectors and Systems, 1990., Fourth International Conference on
Print_ISBN :
0-86341-702-7
