科研之友
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摘要
A novel fiber-laser-based strain sensor is proposed all 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 stain-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.
- 出版日期2008-11-10
- 单位北京交通大学
