Broadband fiber optic ultrasound hydrophone probe

Author

Mu, C. ; Umchid, S. ; Bansal, L. ; Levin, P.A. ; El-Sherif, M. ; Daryoush, A.S.

Author_Institution

Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA, USA

fYear

2004

fDate

19-20 Oct. 2004

Firstpage

149

Lastpage

152

Abstract

A broadband fiber-optic based hydrophone probe is reported for measurements of acoustic fields at the frequencies up to 100 MHz. The fiber probe with a tip diameter of about 8 microns provides a desirable measurement tool eliminating the need for spatial averaging corrections. Power budget calculation of the fiber sensor set-up indicated that high power (200 mW) laser source is essential to achieve adequate signal-to-noise ratio. The results of the preliminary measurements allowed the probe sensitivity to be determined. Improvements to the measurement arrangements are discussed to bring this sensitivity (about 1.7 mV/MPa) in line with that theoretically calculated (4.3 mV/MPa).

Keywords

fibre optic sensors; hydrophones; ultrasonic devices; ultrasonic variables measurement; 100 MHz; 200 mW; 8 micron; acoustic fields; broadband probe; fiber optic probe; fiber sensor set-up; high power laser source; hydrophone probe; power budget calculation; probe sensitivity; signal-to-noise ratio; spatial averaging corrections; ultrasound probe; Acoustic measurements; Acoustic sensors; Fiber lasers; Frequency measurement; Optical fiber sensors; Optical fibers; Probes; Sonar equipment; Ultrasonic imaging; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Lightwave Technologies in Instrumentation and Measurement Conference, 2004. Proceedings of the

Print_ISBN

0-7803-8722-8

Type

conf

DOI

10.1109/LTIMC.2004.1371014

Filename

1371014