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The phase interrogation method for optical fiber sensor by analyzing the fork interference pattern

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Abstract

The phase interrogation method for optical fiber sensor is proposed based on the fork interference pattern between the orbital angular momentum beam and plane wave. The variation of interference pattern with phase difference between the two light beams is investigated to realize the phase interrogation. By employing principal component analysis method, the features of the interference pattern can be extracted. Moreover, the experimental system is designed to verify the theoretical analysis, as well as feasibility of phase interrogation. In this work, the Mach–Zehnder interferometer was employed to convert the strain applied on sensing fiber to the phase difference between the reference and measuring paths. This interrogation method is also applicable for the measurements of other physical parameters, which can produce the phase delay in optical fiber. The performance of the system can be further improved by employing highlysensitive materials and fiber structures.

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Acknowledgements

This work was partially supported by the National Nature Science Foundation of China (NSFC) (61403074) and the Fundamental Research Funds for the Central Universities (N160404002).

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Authors and Affiliations

  1. College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China

    Riqing Lv, Liqiang Qiu, Haifeng Hu, Lu Meng & Yong Zhang

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  1. Riqing Lv
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  2. Liqiang Qiu
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  3. Haifeng Hu
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  4. Lu Meng
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  5. Yong Zhang
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Correspondence to Haifeng Hu.

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Lv, R., Qiu, L., Hu, H. et al. The phase interrogation method for optical fiber sensor by analyzing the fork interference pattern. Appl. Phys. B 124, 32 (2018). https://doi.org/10.1007/s00340-018-6901-5

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  • DOI: https://doi.org/10.1007/s00340-018-6901-5

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