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
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.
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.