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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 18 — Jun. 20, 2014
  • pp: 4085–4088

High-sensitivity temperature sensor based on a droplet-like fiber circle

Jianglei Xie, Ben Xu, Yi Li, Juan Kang, Changyu Shen, Jianfeng Wang, Yongxing Jin, Honglin Liu, Kai Ni, Xinyong Dong, Chunliu Zhao, and Shangzhong Jin  »View Author Affiliations

Applied Optics, Vol. 53, Issue 18, pp. 4085-4088 (2014)

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A low-cost yet high-sensitivity temperature fiber sensor is proposed and demonstrated in this paper. A single-mode fiber with coating is simply bent in a droplet-like circle with a radius of several millimeters. The strong bending induces mode interferences between the silica core mode and the excited modes propagating in the polymer coating. Many resonant dips were observed in the transmission spectra and are found to shift to a shorter wavelength with the increase of environmental temperature. Our linear fitting result of the experimental data shows that the proposed sensor presents high temperature sensitivity up to 3.102nm/°C, which is even comparable with sensors based on selective liquid-filled photonic crystal fibers. Such high temperature sensitivity results from the large thermo-optical coefficient difference between the silica core and the polymer coating. The influence of a circle radius to the sensitivities is also discussed.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6780) Instrumentation, measurement, and metrology : Temperature

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: February 27, 2014
Revised Manuscript: May 6, 2014
Manuscript Accepted: May 18, 2014
Published: June 20, 2014

Jianglei Xie, Ben Xu, Yi Li, Juan Kang, Changyu Shen, Jianfeng Wang, Yongxing Jin, Honglin Liu, Kai Ni, Xinyong Dong, Chunliu Zhao, and Shangzhong Jin, "High-sensitivity temperature sensor based on a droplet-like fiber circle," Appl. Opt. 53, 4085-4088 (2014)

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