The fiber optic probe hydrophone

Author

Wurster, C. ; Staudenraus, J. ; Eisenmenger, W.

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

941

Abstract

We present a new type of hydrophone based on a fiber-optic sensor principle for shock wave and ultrasonic measurements in water. Its detection mechanism is based on the change of the optical reflection coefficient at the end surface of a glass fiber in water by pressure signals. The relation between the intensity of the reflected light and the water pressure is defined by material constants so that calibration by reference is not necessary. Shock wave measurements were made with the fiber optic probe hydrophone and compared with the results obtained by PVDF membrane and needle hydrophones. Important advantages are high resolution in space and time, a reproducible response also to negative pressure signals with high accuracy, high cavitation threshold, large bandwidth (>1 GHz), ideal electromagnetic shielding, high deterioration resistance and simple calibration control

Keywords

calibration; fibre optic sensors; hydrophones; light reflection; probes; shock measurement; ultrasonic measurement; underwater sound; 1 GHz; US measurement; calibration control; detection mechanism; deterioration resistance; electromagnetic shielding; fiber optic probe hydrophone; fiber-optic sensor principle; glass fiber; high cavitation threshold; high resolution; ideal EM shielding; large bandwidth; negative pressure signals; optical reflection coefficient; shock wave measurement; water pressure; wideband; Acoustic measurements; Calibration; Hydrophones; Optical fiber transducers; Optical reflection; Underwater acoustic measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401697

Filename

401697