An active strain sensing system based on single-longitudinal-mode distributed Bragg reflector fiber laser and its applications in the measurement of erbium-doped fiber birefringence
Hao Zhang
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
Search for more papers by this authorCorresponding Author
Bo Liu
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, ChinaSearch for more papers by this authorChenglai Jia
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
Search for more papers by this authorHao Zhang
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
Search for more papers by this authorCorresponding Author
Bo Liu
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, ChinaSearch for more papers by this authorChenglai Jia
Key Laboratory of Opto-Electronic Information and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China
Search for more papers by this authorAbstract
An active strain sensing system based on single-longitudinal-mode distributed Bragg reflector fiber laser is proposed and experimentally demonstrated. Owing to the short laser cavity length and birefringence-induced mode splitting, the proposed laser in single-longitudinal-mode operation provides a beat signal from 1.598 to 2.53 GHz as the strain applied onto the fiber laser changes, and through beat frequency interrogation the proposed laser sensor turns out a strain sensitivity of ∼0.21 MHz/με. Moreover, by simultaneously monitoring the laser wavelength and beat frequency, strain dependence of erbium-doped fiber birefringence has also been measured, and experimental results show that erbium-doped fiber birefringence has a strain sensitivity of ∼1.59 × 10−9/με. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2508-2512, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26302
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