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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 6 — Mar. 15, 2010
  • pp: 835–837

Multilongitudinal mode fiber laser for strain measurement

Shengchun Liu, Zuowei Yin, Liang Zhang, Liang Gao, Xiangfei Chen, and Jianchun Cheng  »View Author Affiliations


Optics Letters, Vol. 35, Issue 6, pp. 835-837 (2010)
http://dx.doi.org/10.1364/OL.35.000835


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Abstract

A multilongitudinal mode fiber laser sensor formed by two fiber Bragg gratings and a piece of erbium-doped fiber is first proposed and validated experimentally. When the strain is applied on the sensor, the laser cavity is stretched, which leads to a change of round-trip frequency. Thus the strain can be obtained by measuring the beat frequency of the resonant cavity. The proposed sensor is found to be characterized with simplicity, easy setup, high resolution, low-cost demodulation, and good stability. Experimental results show that the sensor has a sensitivity of 1.1 KHz μ ϵ and the root-mean-square deviation of 3.6 μ ϵ .

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3500) Lasers and laser optics : Lasers, erbium
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 15, 2009
Revised Manuscript: December 13, 2009
Manuscript Accepted: December 30, 2009
Published: March 12, 2010

Citation
Shengchun Liu, Zuowei Yin, Liang Zhang, Liang Gao, Xiangfei Chen, and Jianchun Cheng, "Multilongitudinal mode fiber laser for strain measurement," Opt. Lett. 35, 835-837 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-6-835

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