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A flexural push-pull fibre-optic hydrophone incorporating acceleration cancelling and feedback stabilization

Uchil, S and Bhushan, Phani K and Naik, GM and Selvarajan, A (1993) A flexural push-pull fibre-optic hydrophone incorporating acceleration cancelling and feedback stabilization. In: International Journal of Optoelectronics, 8 (4). pp. 419-424.

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Abstract

A flexural type Mach-Zehnder fibre-optic hydrophone is fabricated and tested. A single mode optical fibre of 3·6 m in each arm, 1300 nm laser diode, photodiode and processing circuits constitute the sensor. A feedback stabilization scheme which compensates for phase drift introduced due to laser frequency jitter and environmental disturbances is described. This has a stress voltage coefficient of 26·5 π rad $V^{-1}m^-1$. The sensor shows a flat response up to 4000 Hz and a resonance peak at 6000 Hz. Its sensitivity is 3·5 rad Pascal $^{-1}$ in the flat region and 270 rad Pascal $^{-1}$ at the resonance frequency. The response of the present sensor compares favourably with that of a standard Bruel and Kjaer Type 8103 PZT hydrophone (7 refs.)

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor & Francis.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 08 Aug 2007
Last Modified: 27 Aug 2008 12:21
URI: http://eprints.iisc.ernet.in/id/eprint/8458

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