Abstract
Lda With Variable Frequency Shift
This paper will discuss various methods of optical and electronic frequency shift as used with a laser doppler anemometer system. Specifically, an opto-electronic system that allows a stable frequency shift variable from 10 KHz to 50 MHz will be covered. The system combines a fixed shift from a Bragg cell and an electronic shift; resulting from the mixing of the detector signal with a variable local oscillator. The advantages of using this system with tracker or counter processing will be explained.
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© 1980 Springer Science+Business Media New York
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Humphrey, R.L. (1980). 1980 Updates in Optical and Thermal Anemometry. In: Schneck, D.J. (eds) Biofluid Mechanics · 2. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-4610-5_22
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DOI: https://doi.org/10.1007/978-1-4757-4610-5_22
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-4612-9
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