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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 5 — Mar. 1, 2012
  • pp: 863–865

Temperature sensor based on an isopropanol-sealed photonic crystal fiber in-line interferometer with enhanced refractive index sensitivity

Sun-jie Qiu, Ye Chen, Fei Xu, and Yan-qing Lu  »View Author Affiliations

Optics Letters, Vol. 37, Issue 5, pp. 863-865 (2012)

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We fabricate a simple, compact, and stable temperature sensor based on a liquid-sealed photonic crystal fiber (PCF) in-line nonpolarimetric modal interferometer. Different from other reported PCF devices, it does not need expensive polarimetric devices, and the liquid is sealed in one fiber. The device consists of a stub of isopropanol-filled PCF spliced between standard single-mode fibers. The temperature sensitivity (166pm/°C) increases over an order of magnitude compared with those of the previous sensors based on air-sealed PCF interferometers built via fusion splicing with the same mechanism. In addition, the refractive index sensitivity also increases. Higher temperature sensitivity can be realized by infiltrating some liquid having a higher thermo-optic coefficient into the microholes of the PCF.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: November 28, 2011
Revised Manuscript: January 1, 2012
Manuscript Accepted: January 16, 2012
Published: February 24, 2012

Sun-jie Qiu, Ye Chen, Fei Xu, and Yan-qing Lu, "Temperature sensor based on an isopropanol-sealed photonic crystal fiber in-line interferometer with enhanced refractive index sensitivity," Opt. Lett. 37, 863-865 (2012)

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