• Chinese Optics Letters
  • Vol. 19, Issue 9, 090601 (2021)
Fangcheng Shen1, Xuewen Shu2, Kaiming Zhou3, Haiming Jiang1, Hongyan Xia1, Kang Xie1、*, and Lin Zhang3
Author Affiliations
  • 1State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • 2Wuhan National Laboratory for Optoelectronics & School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  • 3Institute of Photonic and Technologies, Aston University, Birmingham B4 7ET, UK
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    Abstract

    We propose and demonstrate a sensitive vector twist sensor based on a small period long period fiber grating (SP-LPFG) fabricated with a femtosecond (fs) laser. The fabricated SP-LPFG is compact in size (2.8 mm) and shows strong polarization dependent peaks in its transmission spectrum due to the vectorial behavior of high-order cladding modes. Twist sensing is realized by monitoring the polarization dependent peaks, since the polarization of input light changes with fiber twist. The proposed sensor can be interrogated by the peak intensity and wavelength, with high twist sensitivity that reaches 0.257 dB/deg and 0.115 nm/deg, respectively.
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    Fangcheng Shen, Xuewen Shu, Kaiming Zhou, Haiming Jiang, Hongyan Xia, Kang Xie, Lin Zhang. Compact vector twist sensor using a small period long period fiber grating inscribed with femtosecond laser[J]. Chinese Optics Letters, 2021, 19(9): 090601
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    Category: Fiber Optics and Optical Communications
    Received: Jan. 12, 2021
    Accepted: Mar. 4, 2021
    Posted: Jul. 8, 2021
    Published Online: Jul. 13, 2021
    The Author Email: Kang Xie (kangxie@gdut.edu.cn)