Accession Number : ADP008947

Title :   The Effect of Acoustic Noise on Optical Fibre Based Laser Doppler Velocimetry Systems,

Corporate Author : SOUTHAMPTON UNIV (UNITED KINGDOM)

Personal Author(s) : Pannell, C. N. ; Jones, J. D. ; Jackson, D. A.

Report Date : 23 JUL 1992

Pagination or Media Count : 6

Abstract : The potentially serious problem of acoustic noise pick-up in fibre-based LDV systems is addressed both theoretically and experimentally. A new broadening mechanism, called phase noise broadening, is discussed and the magnitude of this effect is estimated for typical LDV systems. This broadening leads to an overestimate of the turbulence index which is more serious for low speed flows. In a representative situation the magnitude of the error in the turbulence index is of the order of 5%. (Author)

Descriptors :   *LASER VELOCIMETERS, *FIBER OPTICS, FLOW NOISE, DOPPLER EFFECT, INTERFERENCE, DATA ACQUISITION, LABORATORY EQUIPMENT, GREAT BRITAIN.

Subject Categories : Test Facilities, Equipment and Methods
      Optical Detection and Detectors
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE