Main > HPArticle > Investigation on temperature characteristics of weak fiber Bragg grating in a wide range
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  • Manuscript Accepted: Aug. 22, 2019

    Online Published: Aug. 23, 2019

Chinese Optics Letters, 2019, Vol. 17, Issue 12, pp.

Investigation on temperature characteristics of weak fiber Bragg grating in a wide range

Fan Xiaojun, JIANG J.F., Zhang Xuezhi, Liu Kun, Wang Shuang, Liu Tiegen

Author Affiliations

  • Tianjin Univ.
  • Tianjin Univ.
  • 天津大学精仪学院
  • Tianjin Univ.
  • Tianjin University

Abstract

Wake fiber Bragg grating (WFBG) is an ideal quasi-distributed optical fiber sensor. Special attention should be paid to the spectrum and sensing performance of WFBG at extreme temperature due to its poor reflection intensity. In this paper, the temperature characteristics of WFBG from -252.75℃ to 200.94℃ are experimentally investigated. Five WFBGs with reflectivity from ~0.25% to ~10% are used in the experiments. The reflectivity variations and wavelength shifts at different temperatures are studied. Experimental results show that the WFBG can survive and work at extreme temperature, but the performance is affected significantly. The reflectivity is affected significantly by both cryogenic temperature and high temperature. The temperature responses of Bragg wavelengths in the wide temperature range are also obtained.

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