Backscatter Laser Velocimeter for Energetic Deep-Sea Flows: Performance Study in Particulate Dense Water

Author

Agrawal, Y.C. ; Terry, W.E., Jr. ; Williams, A.J.

Author_Institution

Woods Hole Oceanogr. Instn., Woods Hole, MA, USA

fYear

1980

fDate

8-10 Sept. 1980

Firstpage

332

Lastpage

337

Abstract

A dual beam backscatter laser Doppler velocimeter designed for oceanographic usage will be described. The instrument was constructed to test, in the laboratory, the signal characteristics as a function of suspended particle loading in the water - a subject of concern in the study of high energy benthic boundary layers. It has been found that with proper design, the predominant mode of signal observed is still from the single scatterer, at particle concentrations of up to 5 mg/ℓ. Variations in signal-to-noise ratio will be described and compared with theoretical calculations.

Keywords

backscatter; geophysical signal processing; laser velocimeters; oceanographic equipment; sediments; dual beam backscatter laser Doppler velocimeter; energetic deep-sea flows; high energy benthic boundary layers; particle concentrations; particulate dense water; signal characteristics; signal-to-noise ratio; suspended particle loading; Degradation; Laser beams; Laser modes; Laser theory; Light scattering; Optical attenuators; Optical scattering; Particle beams; Particle scattering; Scanning probe microscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '80

Conference_Location

Seattle, WA

Type

conf

DOI

10.1109/OCEANS.1980.1151445

Filename

1151445