3 October 2007 Development of a short-range 355-nm Rayleigh-Mie lidar using a Michelson interferometer for wind speed measurements
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Abstract
We report the development of a 355-nm lidar system for short-range wind speed measurements, using a fringe-imaging Michelson interferometer as a spectral analyzer. The instrument principle is to deduce the wind speed from the phase variations of the two-wave interference pattern provided by the interferometer. A laboratory demonstrator has been realized, which was designed in an original way to minimize the sensitivity to phase fluctuations caused by thermo-mechanical disturbances and laser drifts. An accurate signal processing has been developed, providing with estimates of five fringe parameters: intensity, contrast, periodicity, angular orientation, and phase. It is implemented in two steps: the first step uses a Fourier transform analysis and the second step a maximum-likelihood estimator. To validate the instrument principle, measurement method and signal processing alltogether, a calibrated speed measurement experiment has been performed on hard target, for which the results are shown.
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Nicolas Cezard, Agnes Dolfi-Bouteyre, Jean-Pierre Huignard, and Pierre Flamant "Development of a short-range 355-nm Rayleigh-Mie lidar using a Michelson interferometer for wind speed measurements", Proc. SPIE 6750, Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing III, 675008 (3 October 2007); doi: 10.1117/12.737345; https://doi.org/10.1117/12.737345
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