Results in Physics (Oct 2021)

High sensitivity temperature sensor based on a helically twisted photonic crystal fiber

  • Shi Qiu,
  • Jinhui Yuan,
  • Sainan Duan,
  • Xian Zhou,
  • Chao Mei,
  • Yuwei Qu,
  • Binbin Yan,
  • Qiang Wu,
  • Kuiru Wang,
  • Xinzhu Sang,
  • Keping Long,
  • Chongxiu Yu

Journal volume & issue
Vol. 29
p. 104767

Abstract

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Helically twisted photonic crystal fibers (HT-PCFs) provide additional opportunities for controlling the light propagation characteristics and improving the sensing performances. In this paper, a toluene and gold wire-filled HT-PCF was proposed and designed for high sensitivity temperature sensing. The influences of the structure parameters on the confinement loss, sensitivity, and resolution of the proposed HT-PCF were investigated. For the optimized HT-PCF, the average sensitivity is as high as 14.35 and 17.29 nm/℃ in the temperature range of −20 to 20 ℃ and 20 to 70 ℃, respectively. Moreover, the proposed HT-PCF-based temperature sensor is insensitive to the hydrostatic pressure. Finally, the detailed fabrication process of the toluene and gold wire-filled HT-PCF temperature sensor is proposed. It is believed that the proposed HT-PCF temperature sensor has potential applications in the fields of the environmental monitoring, medical diagnostics, etc.

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