The Doppler frequency shift of scattered light is detected by using an absorption cell. Evaluation of the 1st and 2nd harmonics of amplitude modulated light yields the Doppler frequency without power influences.
© 2004 Optical Society of America
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
H. Müller, J. Czarske, L. Büttner, and T. Razik, "Velocity profile sensor using a frequency modulated laser diode and a molecular absorption cell," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2004), paper CTuP66.
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