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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 23 — Aug. 10, 2007
  • pp: 5928–5932

Distributed fiber temperature and strain sensor using coherent radio-frequency detection of spontaneous Brillouin scattering

Jihong Geng, Sean Staines, Mike Blake, and Shibin Jiang  »View Author Affiliations


Applied Optics, Vol. 46, Issue 23, pp. 5928-5932 (2007)
http://dx.doi.org/10.1364/AO.46.005928


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Abstract

A novel technique that enables coherent detection of spontaneous Brillouin scattering in the radio-frequency ( < 500   MHz ) region with excellent long-term stability has been demonstrated for distributed measurements of temperature and strain in long fiber. An actively stabilized single-frequency Brillouin fiber laser with extremely low phase noise and intensity noise is used as a well-defined, frequency-shifted local oscillator for the heterodyne detection, yielding measurements of spontaneous Brillouin scattering with high frequency stability. Based on this approach, a highly stable real-time fiber sensor for distributed measurements of both temperature and strain over long fiber has been developed utilizing advanced digital signal processing techniques.

© 2007 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 7, 2007
Manuscript Accepted: May 22, 2007
Published: August 9, 2007

Citation
Jihong Geng, Sean Staines, Mike Blake, and Shibin Jiang, "Distributed fiber temperature and strain sensor using coherent radio-frequency detection of spontaneous Brillouin scattering," Appl. Opt. 46, 5928-5932 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-23-5928

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