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Frequency response analysis of the fiber optic hydrophone optimized for large diameter core fibers

S. ZULIC1, P. MIHAILOVIC1, S. J. PETRICEVIC1,*

Affiliation

  1. Department of Physical Electronics, School of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, 11000 Beograd, Serbia

Abstract

This paper demonstrates the procedure for designing, frequency response testing and optimization of a robust fiber optic hydrophone. Sensing head construction allows different fiber layouts, variable membrane to fiber distance and easy membrane change. Testing frequency response in various environmental conditions allows differentiating resonant peak originating from the membrane from range of peaks originating from sound source and resonator. Maximum sensitivity of the sensor response is achieved by optimizing the fiber-membrane distance while attaining sufficient light coupling and minimal mirror mass. Modular construction of the sensing head allows fast reconfiguration of the hydrophone for many types of liquids..

Keywords

Fiber optic sensors, Hydrophone, Light intensity modulation, Frequency response.

Citation

S. ZULIC, P. MIHAILOVIC, S. J. PETRICEVIC, Frequency response analysis of the fiber optic hydrophone optimized for large diameter core fibers, Optoelectronics and Advanced Materials - Rapid Communications, 6, 7-8, July-August 2012, pp.683-686 (2012).

Submitted at: May 14, 2012

Accepted at: July 19, 2012