Fiber optic hydrophone

Kuzmenko, P J; Davis, D T

Title: Fiber optic hydrophone

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Abstract

A miniature fiber optic hydrophone based on the principles of a Fabry-Perot interferometer is disclosed. The hydrophone, in one embodiment, includes a body having a shaped flexible bladder at one end which defines a volume containing air or suitable gas, and including a membrane disposed adjacent a vent. An optical fiber extends into the body with one end terminating in spaced relation to the membrane. Acoustic waves in the water that impinge on the bladder cause the pressure of the volume therein to vary causing the membrane to deflect and modulate the reflectivity of the Fabry-Perot cavity formed by the membrane surface and the cleaved end of the optical fiber disposed adjacent to the membrane. When the light is transmitted down the optical fiber, the reflected signal is amplitude modulated by the incident acoustic wave. Another embodiment utilizes a fluid filled volume within which the fiber optic extends. 2 figures.

Inventors:: Kuzmenko, P J; Davis, D T

Publication Date:: Tue May 10 00:00:00 EDT 1994

OSTI Identifier:: 7035551

Patent Number(s):: US 5311485; A

Application Number:: PPN: US 7-968950

Assignee:: Dept. of Energy, Washington, DC (United States)

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Resource Relation:: Patent File Date: 30 Oct 1992

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; SONIC PROBES; DESIGN; MILITARY EQUIPMENT; MODULATION; OPTICAL FIBERS; SEISMIC SURVEYS; SOUND WAVES; EQUIPMENT; FIBERS; GEOPHYSICAL SURVEYS; PROBES; SURVEYS; 440700* - Geophysical & Meteorological Instrumentation- (1990-); 450000 - Military Technology, Weaponry, & National Defense

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                    Kuzmenko, P J, and Davis, D T. Fiber optic hydrophone.  United States: N. p., 1994. 
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                    Kuzmenko, P J, & Davis, D T. Fiber optic hydrophone.  United States.

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                    Kuzmenko, P J, and Davis, D T. 1994.  
        "Fiber optic hydrophone".  United States.

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@article{osti_7035551,

  title        = {Fiber optic hydrophone},

  author       = {Kuzmenko, P J and Davis, D T},

  abstractNote = {A miniature fiber optic hydrophone based on the principles of a Fabry-Perot interferometer is disclosed. The hydrophone, in one embodiment, includes a body having a shaped flexible bladder at one end which defines a volume containing air or suitable gas, and including a membrane disposed adjacent a vent. An optical fiber extends into the body with one end terminating in spaced relation to the membrane. Acoustic waves in the water that impinge on the bladder cause the pressure of the volume therein to vary causing the membrane to deflect and modulate the reflectivity of the Fabry-Perot cavity formed by the membrane surface and the cleaved end of the optical fiber disposed adjacent to the membrane. When the light is transmitted down the optical fiber, the reflected signal is amplitude modulated by the incident acoustic wave. Another embodiment utilizes a fluid filled volume within which the fiber optic extends. 2 figures.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/7035551},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue May 10 00:00:00 EDT 1994},

  month        = {Tue May 10 00:00:00 EDT 1994}

}

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