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Temperature Sensing Characteristics of Improved SNCS Fiber Sensor

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Abstract

For optical fiber sensor with single-mode-no-core-single-mode (SNCS) structure, the basic principle of SNCS structure sensing is to change the mode field distribution of SNCS structure by changing the refractive index distribution of the structure. The sensitivity can be improved by optimizing the structure or changing the material of the sensitive region. In this paper, the effects of structural parameters and assembly materials on the sensitivity of SNCS optical fiber sensor are studied by far from the cut-off condition. The correctness of these conclusions is verified by experiments. For the temperature sensor, the material with large thermal optical coefficient (TOC) can be used as the cladding or fiber core to improve the sensitivity of the sensor. These conclusions provide some reference for the design and assembly of temperature sensor with SNCS structure.

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ACKNOWLEDGMENTS

The authors acknowledge financial support from the following sources: Henan Postdoctoral Foundation (no. 255449), Award Fund of Henan Key Laboratory (no. 22110002).

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Authors and Affiliations

  1. Henan Key Laboratory of Laser and Opto-electric Information Technology, School of Information Engineering, Zhengzhou University, 450001, Zhengzhou, China

    Zhan Wang, Deli Chen, Xianchao Yang, Junjie Wang & Xiaohong Sun

  2. Institute of Intelligent Sensing, Zhengzhou University, 450001, Zhengzhou, China

    Zhan Wang, Deli Chen, Xianchao Yang & Xiaohong Sun

  3. Aviation Maintenance NCO Academy, Air Force Engineering University, 464000, Xinyang, China

    Sixiang Liang

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  1. Zhan Wang
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  2. Deli Chen
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Correspondence to Xiaohong Sun.

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Wang, Z., Chen, D., Yang, X. et al. Temperature Sensing Characteristics of Improved SNCS Fiber Sensor. Instrum Exp Tech 65, 957–965 (2022). https://doi.org/10.1134/S0020441222060082

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