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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 4 — Feb. 1, 2011
  • pp: 468–472

Sensitivity-enhanced high-temperature sensing using all-solid photonic bandgap fiber modal interference

Youfu Geng, Xuejin Li, Xiaoling Tan, Yuanlong Deng, and Yongqin Yu  »View Author Affiliations

Applied Optics, Vol. 50, Issue 4, pp. 468-472 (2011)

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A wavelength-encoded interferometric high-temperature sensor based on an all-solid photonic bandgap fiber (AS-PBF) is reported. It consists of a small piece of AS-PBF spliced core offset with standard single-mode fibers. Two core modes LP 01 and LP 11 are conveniently utilized as optical arms to form Mach– Zehnder-type interference at both the first and the second photonic bandgaps, and the maximum extinction ratio exceeds 25 dB . Experimental and theoretical investigation of its response to temperature confirms that high temperatures up to 700 ° C can be effectively sensed using such an AS-PBF interferometer, and benefiting from a large effective thermo-optic coefficient of fiber structure, the sensitivity can be significantly enhanced ( 71.5 pm / ° C at 600 ° C ).

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 5, 2010
Manuscript Accepted: December 12, 2010
Published: January 26, 2011

Youfu Geng, Xuejin Li, Xiaoling Tan, Yuanlong Deng, and Yongqin Yu, "Sensitivity-enhanced high-temperature sensing using all-solid photonic bandgap fiber modal interference," Appl. Opt. 50, 468-472 (2011)

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