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7 November 2012 Dual-π-phase-shift distributed fiber laser for strain sensing
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842194 (2012) https://doi.org/10.1117/12.970307
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
A dual-π-phase shift distributed fiber laser (DFB FL) with symmetric structure is investigated as a strain sensor. The sensing performances under both monolithic and local axial strain are discussed by use of transfer matrix method. While the two lasing wavelengths of dual-π-phase shift DFB FL experience the same change as that of single-η-phase shift DFB FL under monolithic strain, their wavelength interval changes with local strain. And the strain sensitivity of beat frequency is calculated to be 70.6 MHz/με while one phase shift area is insensitive.
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Xiaolei Zhang, Gangding Peng, Chang Wang, Zhihui Sun, Zhiqiang Song, and Jiasheng Ni "Dual-π-phase-shift distributed fiber laser for strain sensing", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842194 (7 November 2012); https://doi.org/10.1117/12.970307
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