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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 2 — Jan. 10, 2012
  • pp: 176–180

Using a Mach–Zehnder-interference-based passive configuration to eliminate the polarization noise in Brillouin optical time domain reflectometry

Feng Wang, Cunlei Li, Xiaodong Zhao, and Xuping Zhang  »View Author Affiliations


Applied Optics, Vol. 51, Issue 2, pp. 176-180 (2012)
http://dx.doi.org/10.1364/AO.51.000176


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Abstract

We propose a passive polarization depolarizer to overcome the polarization noise in Brillouin optical time domain reflectometry (BOTDR). We also give a theoretical analysis of the depolarizer. The depolarizer is highly stable and has small insertion loss. It is based on a Mach–Zehnder interference scheme and mainly consists of two polarization beam splitters and a piece of delay fiber. Experimental results show that the polarization noise can be reduced by 96% by the depolarizer, and the Brillouin frequency shift induced by heat can be accurately detected by BOTDR with this depolarizer. The pulse width is 30 ns and the length of the sensing fiber is 24 km, which is the longest reported distance achieved with such a short pulse for BOTDR, to the best of our knowledge.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2420) Fiber optics and optical communications : Fibers, polarization-maintaining
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 19, 2011
Manuscript Accepted: October 12, 2011
Published: January 9, 2012

Citation
Feng Wang, Cunlei Li, Xiaodong Zhao, and Xuping Zhang, "Using a Mach–Zehnder-interference-based passive configuration to eliminate the polarization noise in Brillouin optical time domain reflectometry," Appl. Opt. 51, 176-180 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-2-176

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