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Proceedings Paper

Time-division-multiplexed laser Doppler anemometry using pulsed laser diodes and optical fibers
Author(s): Robert A. Lockey; Ralph P. Tatam
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Paper Abstract

A time division multiplexed laser Doppler anemometer is reported, using a single high frequency pulsed laser diode as a source. Time division multiplexing requires a single detector channel, removing the need for multiple detectors and wavelength separation optics found in conventional CW laser Doppler systems. By incorporating optical fibers into the system to distribute the pulses into each channel and impose a delay between channels, the electronic requirements of such an instrument are reduced. Results for a 2D system are presented, measured on a water-seeded air jet. Individual velocity components of up to 16 ms-1 and overall velocities of up to 20 -1 have been detected, but the potential range of the instrument is very much greater.

Paper Details

Date Published: 29 September 1995
PDF: 7 pages
Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); doi: 10.1117/12.221545
Show Author Affiliations
Robert A. Lockey, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 2546:
Optical Techniques in Fluid, Thermal, and Combustion Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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