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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 22517–22522

Multimode fiber laser for simultaneous measurement of strain and temperature based on beat frequency demodulation

Liang Gao, Lin Chen, Long Huang, and Xiangfei Chen  »View Author Affiliations


Optics Express, Vol. 20, Issue 20, pp. 22517-22522 (2012)
http://dx.doi.org/10.1364/OE.20.022517


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Abstract

A multimode fiber laser sensor system for simultaneous measurement of strain and temperature is proposed and demonstrated. Because of the long cavity and birefringence, longitudinal mode beat frequency and polarization mode beat frequency are achieved in the beat frequency signals of the multimode fiber laser. The strain and temperature can be obtained by monitoring both of them for their different strain and temperature responses. The experimental measurement errors are within ± 16.2με and ± 1.9°C. The usage of only one fiber laser and one demodulation system makes the system simple, cost-effective and portable.

© 2012 OSA

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(280.3420) Remote sensing and sensors : Laser sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Sensors

History
Original Manuscript: June 4, 2012
Revised Manuscript: July 21, 2012
Manuscript Accepted: September 10, 2012
Published: September 17, 2012

Citation
Liang Gao, Lin Chen, Long Huang, and Xiangfei Chen, "Multimode fiber laser for simultaneous measurement of strain and temperature based on beat frequency demodulation," Opt. Express 20, 22517-22522 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-20-22517


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References

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