Acoustic Noise Measurements Utilizing High Performance Fiber Optic Hydrophones in the Arctic

Abstract

In April 1990 two fiber optic hydrophones were used to measure the ambient acoustic noise under shore-fast ice at the mouth of Independence Fjord in the vicinity of Kap Eiler Rasmussen, Greenland. The hydrophones were fiber Mach Zehnder interferometers operating at 1.3 microns, one device was powered with a semiconductor diode laser source, the other with a diode pumped Nd:YAG laser source. The electro-optic system (lasers, detectors, and electronics) was located in a shelter on the ice, the hydrophones were interrogated over 2 km of fiber optic cable. Measurements of the ambient noise were made over a 9 day period and contained data ranging from substantially below sea state zero to high noise levels due to the presence of machinery. Keywords: Hydrophones; Fiber optics; Ambient noise.

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Document Details

Document Type
Technical Report
Publication Date
Oct 12, 1990
Accession Number
ADA228175

Entities

People

  • A. B. Tveten
  • A. Dandridge
  • A. M. Yurek

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Ambient Noise
  • Bandwidth
  • Detection
  • Detectors
  • Frequency
  • Frequency Bands
  • Human Factors Engineering
  • Laser Diodes
  • Measurement
  • Military Research
  • Modulation
  • Naval Warfare
  • Noise Reduction
  • Self Noise
  • Semiconductor Diodes
  • Semiconductors
  • Yag Lasers

Fields of Study

  • Physics

Readers

  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Optical Physics and Photonics.
  • Polar and Arctic Studies

Technology Areas

  • Directed Energy
  • Microelectronics
  • Microelectronics - Microelectromechanical Systems