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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 6, Iss. 11 — Nov. 1, 2008
  • pp: 818–820

A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror

Ou Xu, Shaohua Lu, Suchun Feng, and Shuisheng Jian  »View Author Affiliations


Chinese Optics Letters, Vol. 6, Issue 11, pp. 818-820 (2008)


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Abstract

A novel fiber-laser-based strain sensor is proposed and experimentally demonstrated. The laser cavity is composed of a high-birefringence Sagnac fiber loop mirror (HiBi-SFLM) and a fiber Bragg grating (FBG) which also acts as a strain-sensing element. In the linear region of the HiBi-SFLM reflection spectrum, when the strain applied on the FBG makes the Bragg grating wavelength shift, the laser output power changes due to reflectivity variation of the HiBi-SFLM. Experimental results show that the laser output power varies almost linearly with the applied strain. The measurement of the output power can be performed by a conventional photo-detector.

© 2008 Chinese Optics Letters

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3510) Lasers and laser optics : Lasers, fiber

Citation
Ou Xu, Shaohua Lu, Suchun Feng, and Shuisheng Jian, "A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror," Chin. Opt. Lett. 6, 818-820 (2008)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-6-11-818


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