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Proceedings Paper

Wide field-of-view coherent detection
Author(s): Sebastien Breugnot; Martin Defour; Jean-Pierre Huignard
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Paper Abstract

The concept of a wide field-of-view coherent detection insensitive to the wavefront distortions of the signal to be detected is proposed. The principal of this detection is based on two-wave mixing in photorefractive materials. The experimental validation of this concept is demonstrated at (lambda) equals 0.5 micrometers using a photorefractive crystal of Bi12SiO20. The sensitivity of the detection is theoretically and experimentally analyzed. It led to the conception of a wide field-of-view coherent detection demonstrator operating in the eye-safe band using a photorefractive crystal of CdTe. The application of this device to vibrations analysis of a mechanical structure and the determination of its resonance frequency are demonstrated.

Paper Details

Date Published: 6 August 1997
PDF: 9 pages
Proc. SPIE 3065, Laser Radar Technology and Applications II, (6 August 1997); doi: 10.1117/12.281010
Show Author Affiliations
Sebastien Breugnot, Thomson-CSF (France)
Martin Defour, Thomson-CSF (France)
Jean-Pierre Huignard, Thomson-CSF (France)


Published in SPIE Proceedings Vol. 3065:
Laser Radar Technology and Applications II
Gary W. Kamerman, Editor(s)

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