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Proceedings Paper

High sensitivity flatted mandrel hydrophone
Author(s): Lun K. Cheng; Dick de Bruijn
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Paper Abstract

An axial flatted mandrel type of fiber optic hydrophone, named as Mark VI, has been constructed and tested. The sensor is based on a Michelson type interferometer and is built with polarization-maintaining fiber optic components to suppress signal fading due to changes in polarization. The sensitivity is tested in a range from 200 Hz to 1500 Hz. Up to 1000 Hz the sensitivity is found to be 275 mrad/Pa or higher. With 0.8 m of sensing fiber the normalized sensitivity is found to be -277 dB re 1/(mu) Pa, which is one of the highest ever reported. Up to 1000 Hz the noise level of the Mark VI is about 10 dB below Seastate Zero.

Paper Details

Date Published: 9 March 1994
PDF: 6 pages
Proc. SPIE 2070, Fiber Optic and Laser Sensors XI, (9 March 1994); doi: 10.1117/12.169912
Show Author Affiliations
Lun K. Cheng, TNO Institute of Applied Physics (Netherlands)
Dick de Bruijn, TNO Institute of Applied Physics (Netherlands)


Published in SPIE Proceedings Vol. 2070:
Fiber Optic and Laser Sensors XI
Ramon P. DePaula, Editor(s)

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