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Miniaturized mandrel-based fiber optic hydrophone.

Gregory H Ames1, Jason M Maguire

  • 1Naval Undersea Warfare Center, Division Newport, 1176 Howell Street, Newport, Rhode Island, 02841, USA.

The Journal of the Acoustical Society of America
|April 6, 2007
PubMed
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A new miniature fiber optic hydrophone, one-third the diameter of previous models, offers high responsivity for thin towed arrays. This innovation relies on small diameter fiber and high-strength fiber Bragg gratings for improved reliability and performance.

Area of Science:

  • Acoustics
  • Optics
  • Materials Science

Background:

  • Traditional fiber optic hydrophones utilize long sensor fibers around air-filled mandrels for high responsivity.
  • Mandrel diameter is constrained by fiber reliability, limiting miniaturization.

Purpose of the Study:

  • To develop a significantly smaller fiber optic hydrophone.
  • To enable applications requiring very thin towed arrays.

Main Methods:

  • Designed a hydrophone with approximately one-third the diameter of conventional devices.
  • Employed small diameter optical fiber with high-strength Fiber Bragg Gratings (FBGs) written through the coating.

Main Results:

  • Successfully created a miniature fiber optic hydrophone.

Related Experiment Videos

  • Demonstrated the feasibility of miniaturization through advanced fiber and FBG technology.

    • Conclusions:

    • The miniature hydrophone is suitable for applications like thin towed arrays.
    • Small diameter fiber and robust FBGs are critical for achieving high responsivity in compact hydrophone designs.