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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 22 — Aug. 1, 2009
  • pp: 4302–4309

Cost-effective bandwidth-reduced Brillouin optical time domain reflectometry using a reference Brillouin scattering beam

Daisuke Iida and Fumihiko Ito  »View Author Affiliations


Applied Optics, Vol. 48, Issue 22, pp. 4302-4309 (2009)
http://dx.doi.org/10.1364/AO.48.004302


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Abstract

We propose a simple and cost-effective technique that can reduce the electrical bandwidth for Brillouin frequency-shift sensors with heterodyne detection without the need for expensive instruments or a complicated system. With this technique we use only a reference fiber. The reference Brillouin scattering light in the reference fiber is used as a local light for heterodyne detection. We confirm that this method can be used for measuring the Brillouin scattering spectrum distribution with a much lower frequency bandwidth ( 0.2 GHz ) than that employed for conventional heterodyne detection ( 11 GHz ). The method operates in a way similar to conventional Brillouin optical time domain reflectometry with comparable accuracy. Moreover, we successfully demonstrate temperature distribution sensing and show that we can compensate for temperature variation in the reference fiber.

© 2009 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 7, 2009
Revised Manuscript: June 1, 2009
Manuscript Accepted: June 29, 2009
Published: July 21, 2009

Citation
Daisuke Iida and Fumihiko Ito, "Cost-effective bandwidth-reduced Brillouin optical time domain reflectometry using a reference Brillouin scattering beam," Appl. Opt. 48, 4302-4309 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-22-4302

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