A phase-stepped grating technique for frequency shifting in laser Doppler velocimetry |
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Authors: | J.P. Sharpe |
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Affiliation: | aDepartment of Physics, Cal Poly State University, San Luis Obispo, CA 93407, USA |
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Abstract: | We demonstrate a novel approach to the moving grating technique for removal of velocity ambiguity in a laser Doppler velocimeter. The method replaces the continuous motion of a moving grating with a grating which can be positioned or switched to three distinct phase positions. Advantages of this approach are its potential for compact implementation and high stability of the velocity offset. |
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Keywords: | Laser Doppler velocimetry Phase-stepping |
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