6 October 1986 A Ground Based CO2 Laser Doppler Velocimeter Employing An Offset Local Oscillator
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Abstract
GEC Avionics have supplied a number of long range CO2 Laser Doppler Velocimeter (LDV) systems for specific research applications. This paper describes an experimental laboratory based Laser Doppler Velocimeter system, which has been constructed as part of a programme of work aimed at reducing the size and cost of ground based LDVs. The system incorporates an acousto-optic Bragg cell to provide an offset local oscillator, which enables target speed and direction to be resolved. An RF waveguide CO2 laser is e,Liployed to provide both the transmitter and local oscillator beams. The system has been used to measure the instantaneous velocity of spinning wheel targets and laboratory generated aerosol. Some examples of the processed returns from a spinning wheel target are presented.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S R Guy, RW. A. Coveney, "A Ground Based CO2 Laser Doppler Velocimeter Employing An Offset Local Oscillator", Proc. SPIE 0663, Laser Radar Technology and Applications I, (6 October 1986); doi: 10.1117/12.938672; https://doi.org/10.1117/12.938672
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