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

fYear

1995

fDate

11/7/1995 12:00:00 AM

Firstpage

42430

Lastpage

42435

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;

fLanguage

English

Publisher

iet

Conference_Titel

Progress in Fibre Optic Sensors and Their Applications, IEE Colloquium on

Conference_Location

London

Type

conf

DOI

10.1049/ic:19951211

Filename

499536