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  • Received: Aug. 10, 2007

    Accepted: --

    Posted: May. 20, 2008

    Published Online: May. 20, 2008

    The Author Email: Zefeng Wang (hotrosemaths@163.com)

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    Zefeng Wang, Yongming Hu, Zhou Meng, Ming Ni. Pseudo working-point control measurement scheme for acoustic sensitivity of interferometric fiber-optic hydrophones[J]. Chinese Optics Letters, 2008, 6(5): 381

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Chinese Optics Letters, Vol. 6, Issue 5, 381 (2008)

Pseudo working-point control measurement scheme for acoustic sensitivity of interferometric fiber-optic hydrophones

Zefeng Wang*, Yongming Hu, Zhou Meng, and Ming Ni

Author Affiliations

  • College of Photoelectric Science and Engineering, National University of Defense Technology, Changsha 410073

Abstract

A novel pseudo working-point control measurement scheme for the acoustic sensitivity of interferometric fiber-optic hydrophones is described and demonstrated. The measurement principle is introduced in detail. An experimental system, which interrogates an interferometric fiber-optic hydrophone with this method, is designed. The acoustic pressure phase sensitivity of the fiber-optic hydrophone is measured over the frequency range of 20-2500 Hz. The measured acoustic sensitivity is about -156.5 dB re 1 rad/\muPa with a fluctuation lower than +-2 dB, which is in good agreement with the results obtained by the method of phase generated carrier. The experimental results testify the validity of this new method which has the advantages of no electric elements in the sensing head, the simplicity of signal processing, and wide working bandwidth.

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