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

Ou Xu; Shaohua Lu; Suchun Feng; Shuisheng Jian

Chinese Optics Letters, 2008, 6 (11): 818, Published Online: Nov. 17, 2008

A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror Download： 587次

论文大纲

Ou Xu ^1,2,*Shaohua Lu ^1,2Suchun Feng ^1,2Shuisheng Jian ^1,2

Author Affiliations

¹ Key Lab of All Optical Network and Advanced Telecommunication Network, Ministry of Education of China, Beijing Jiaotong University, Beijing 100044

² Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044

光纤传感器光纤激光器光纤光栅 Sagnac环镜应力传感 060.2370 Fiber optics sensors 140.3510 Lasers, fiber 050.2770 Gratings

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.

References

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Ou Xu, Shaohua Lu, Suchun Feng, Shuisheng Jian. A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror[J]. Chinese Optics Letters, 2008, 6(11): 818.

A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror Download： 587次

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A novel fiber-laser-based fiber Bragg grating strain sensor with high-birefringence Sagnac fiber loop mirror Download： 587次

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