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.
Velocity profile sensor using a frequency modulated laser diode and a molecular absorption cell
Conference on Lasers and Electro-Optics, 2004. (CLEO). ; 1 ; 2 pp. vol.1
2004-01-01
123263 byte
Conference paper
Electronic Resource
English
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