1 May 2011 Multilongitudinal mode fiber-ring laser sensor for strain measurement
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A multilongitudinal mode fiber ring laser sensor is proposed and experimentally demonstrated by measuring the strain applied on the laser sensor head. The ring cavity of the laser is formed by a 3-dB coupler, a section of erbium-doped fiber, and one fiber Bragg grating. Photonic generation of beat signals and strain measurement theory are discussed in detail. The strain applied on the fiber ring cavity is obtained by measuring the beat frequency shift. The selection way of the optimal beat signal for strain measurement is obtained by experimental research and discussion. The root-mean-square deviation of the strain and the response of beat frequency to the strain are 2.7 μɛ and 1.5 kHz/μɛ at 1993 MHz, respectively. The proposed sensor scheme offers a cost-effective and high-stability device for strain measurement.
© (2011) Society of Photo-Optical Instrumentation Engineers (SPIE)
Shengchun Liu, Shengchun Liu, Rong Gu, Rong Gu, Liang Gao, Liang Gao, Zuowei Yin, Zuowei Yin, Liang Zhang, Liang Zhang, Xiangfei Chen, Xiangfei Chen, Jianchun Chen, Jianchun Chen, } "Multilongitudinal mode fiber-ring laser sensor for strain measurement," Optical Engineering 50(5), 054401 (1 May 2011). https://doi.org/10.1117/1.3574376 . Submission:

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