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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 20 — Sep. 28, 2009
  • pp: 18142–18147

Miniature fiber-optic temperature sensors based on silica/polymer microfiber knot resonators

Yu Wu, Yun-Jiang Rao, Yi-huai Chen, and Yuan Gong  »View Author Affiliations

Optics Express, Vol. 17, Issue 20, pp. 18142-18147 (2009)

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In this paper, we report two fiber-optic temperature sensors based on silica/polymer microfiber knot resonators (SMKR/PMKR). The structures of these sensors are composed of three layers, MgF2 crystal plate is adopted as the substrate, and the sensing knots are covered by a thin MgF2 slab to keep it steady and immunity to the environment fluctuations. Experimental results show that the temperature sensitivity of SMKR is ~52pm/°C within 30°C~700°C, while the sensitivity of PMKR is ~266pm/°C within 20°C~80°C. The temporal response of SMKR and PMKR sensors are less than 1 ms and 5 ms, respectively. These microfiber knot resonators can be used as miniature high temperature sensors with fast response. Higher resolution can be anticipated with further improvement of the Q factor of the microfiber knot resonators.

© 2009 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.5750) Optical devices : Resonators

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 10, 2009
Revised Manuscript: September 7, 2009
Manuscript Accepted: September 11, 2009
Published: September 24, 2009

Yu Wu, Yun-Jiang Rao, Yi-huai Chen, and Yuan Gong, "Miniature fiber-optic temperature sensors
based on silica/polymer microfiber knot resonators," Opt. Express 17, 18142-18147 (2009)

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