Title :
Fibre optic reference beam laser Doppler velocimetry
Author :
Egan, David ; Lockey, R.A. ; James, Stephen W. ; Tatam, Ralph P.
Author_Institution :
Sch. of Mech. Eng., Cranfield Univ., Bedford, UK
fDate :
11/7/1995 12:00:00 AM
Abstract :
A compact reference beam laser Doppler velocimeter, constructed using a semiconductor laser diode, optical fibre components and semiconductor detectors, is reported. The device has been designed to overcome many of the problems commonly associated with reference beam configurations. The anemometer may be operated with the laser diode operating in cw and pulsed modes, demonstrating its applicability to wavelength and time division multiplexing schemes for 3D laser Doppler velocimetry. The probe is used to measure the velocity of a spinning disk in the range -20 m/s to +20 m/s
Keywords :
anemometers; fibre optic sensors; flow measurement; laser velocimeters; laser velocimetry; time division multiplexing; wavelength division multiplexing; -20 to 20 m/s; 3D laser Doppler velocimetry; anemometer; cw mode; fibre optic reference beam velocimetry; flow measurement; optical fibre components; optimised SNR characteristics; pulsed mode; reference beam laser Doppler velocimeter; semiconductor detectors; semiconductor laser diode; spinning disk velocity measurement; time division multiplexing; wavelength division multiplexing;
Conference_Titel :
Progress in Fibre Optic Sensors and Their Applications, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19951211
