Wide field-of-view coherent detection

Sebastien Breugnot; Martin Defour; Jean-Pierre Huignard

doi:10.1117/12.281010

6 August 1997 Wide field-of-view coherent detection

Sebastien Breugnot, Martin Defour, Jean-Pierre Huignard

Proceedings Volume 3065, Laser Radar Technology and Applications II; (1997) https://doi.org/10.1117/12.281010
Event: AeroSense '97, 1997, Orlando, FL, United States

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.

Citation Download Citation

Sebastien Breugnot, Martin Defour, and Jean-Pierre Huignard "Wide field-of-view coherent detection", Proc. SPIE 3065, Laser Radar Technology and Applications II, (6 August 1997); https://doi.org/10.1117/12.281010

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