Measurement of velocities by backscatter modulation in semiconductor injection lasers

Elizabeth A. Callan; John Gerard McInerney

doi:10.1117/12.59182

26 June 1992 Measurements of velocities by backscatter modulation in semiconductor injection lasers

Elizabeth A. Callan, John Gerard McInerney

Proceedings Volume 1634, Laser Diode Technology and Applications IV; (1992) https://doi.org/10.1117/12.59182
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

The background theory of backscatter modulation and velocimetry using laser diodes is presented together with an experimental demonstration of the application of these laser diodes in laser Doppler velocimetry (LDV). The sensitivity of the laser diode system to backscatter from a diffusely reflecting target is greater than -60 dB. Tests of an LDV system using a moving air mass as the target are described. Possible applications of these systems include airspeed measurements, collision avoidance, and tracking distant objects.

Citation Download Citation

Elizabeth A. Callan and John Gerard McInerney "Measurements of velocities by backscatter modulation in semiconductor injection lasers", Proc. SPIE 1634, Laser Diode Technology and Applications IV, (26 June 1992); https://doi.org/10.1117/12.59182

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