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Proceedings Paper

Utilizing GaalAs Laser Diodes As A Source For Frequency Modulated Continuous Wave (FMCW) Coherent Laser Radars
Author(s): Anthony R. Slotwinski; Francis E. Goodwin; Dana L.. Simonson
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Paper Abstract

This paper describes the development of a Coherent Laser Radar utilizing a Frequency Modulated (FM) GaAlAs laser diode as an optical source. Both metrology (low speed, high accuracy) and vision (high speed, low accuracy) systems have been developed. Characteristics of presently available laser diodes important to this application are discussed, including coherence length, modal and tuning properties, and the effect of back reflected light on the laser diode's performance. Techniques to overcome current laser limitations are presented. These include an electronic linewidth narrowing scheme to enhance the coherence length of the source laser and thus the ultimate range of the radar, and the use of tuning linearization electronics. Finally, the impact of future laser diode technology, such as electronically tunable lasers, is discussed with respect to this application.

Paper Details

Date Published: 22 June 1989
PDF: 7 pages
Proc. SPIE 1043, Laser Diode Technology and Applications, (22 June 1989);
Show Author Affiliations
Anthony R. Slotwinski, Digital Signal Corporation (United States)
Francis E. Goodwin, Digital Signal Corporation (United States)
Dana L.. Simonson, Digital Signal Corporation (United States)

Published in SPIE Proceedings Vol. 1043:
Laser Diode Technology and Applications
Luis Figueroa, Editor(s)

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