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A temperature insensitive strain sensor based on SMF-FMF-NCF-FMF-SMF with core-offset fusion

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Abstract

This paper presents a temperature-insensitive optical fiber strain sensor composed of single-mode fiber (SMF), no core fiber (NCF), and few-mode fiber (FMF). The NCF is fused to two FMFs with core-offset, exciting higher-order modes and generating mode interference. Experimental results demonstrate that the strain sensitivity of the optical fiber sensor can reach − 19.19 pm/με in a strain range from 0 to 600 με. Moreover, within a temperature range from 30℃ to 70℃, the strain-temperature crosstalk of the proposed sensor is remarkably low at 0.104 με/℃. This sensor is easy to fabricate, cost-effective, reusable, and shows promising applications in food processing, civil engineering, aerospace, and other fields.

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Data availability

The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

  1. Department of Optoelectronic Information Science and Engineering, Jiangsu University, Zhenjiang, 212013, China

    Mingyang Chen, Guofeng Xu, Xinqi Su, Ting Zhou, Ying Liang & Tianyi Gong

Authors
  1. Mingyang Chen
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  2. Guofeng Xu
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  3. Xinqi Su
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  4. Ting Zhou
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  5. Ying Liang
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  6. Tianyi Gong
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Contributions

MC: Conceptualization, Writing—Original Draft; GX: Investigation, Writing—Original Draft; XS: Formal analysis; TZ: Validation; YL: Writing—Review and Editing; TG: Conceptualization, Supervision, Writing—Review and Editing.

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Correspondence to Tianyi Gong.

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Chen, M., Xu, G., Su, X. et al. A temperature insensitive strain sensor based on SMF-FMF-NCF-FMF-SMF with core-offset fusion. Appl. Phys. B 130, 5 (2024). https://doi.org/10.1007/s00340-023-08143-3

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