Utilizing GaalAs Laser Diodes As A Source For Frequency Modulated Continuous Wave (FMCW) Coherent Laser Radars

Anthony R. Slotwinski; Francis E. Goodwin; Dana L.. Simonson

doi:10.1117/12.976378

22 June 1989 Utilizing GaalAs Laser Diodes As A Source For Frequency Modulated Continuous Wave (FMCW) Coherent Laser Radars

Anthony R. Slotwinski, Francis E. Goodwin, Dana L.. Simonson

Author Affiliations +

Proceedings Volume 1043, Laser Diode Technology and Applications; (1989) https://doi.org/10.1117/12.976378
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

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.

Citation Download Citation

Anthony R. Slotwinski, Francis E. Goodwin, and Dana L.. Simonson "Utilizing GaalAs Laser Diodes As A Source For Frequency Modulated Continuous Wave (FMCW) Coherent Laser Radars", Proc. SPIE 1043, Laser Diode Technology and Applications, (22 June 1989); https://doi.org/10.1117/12.976378

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