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Proceedings Paper

Dual-π-phase-shift distributed feedback fiber laser for strain sensing
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Paper 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.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842194 (7 November 2012); doi: 10.1117/12.970307
Show Author Affiliations
Xiaolei Zhang, Laser Institute of Shandong Academy of Science (China)
Gangding Peng, Univ. of New South Wales (Australia)
Chang Wang, Laser Institute of Shandong Academy of Science (China)
Zhihui Sun, Laser Institute of Shandong Academy of Science (China)
Zhiqiang Song, Laser Institute of Shandong Academy of Science (China)
Jiasheng Ni, Laser Institute of Shandong Academy of Science (China)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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