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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea


  • Vol. 12, Iss. 4 — Dec. 25, 2008
  • pp: 221–225

Hydrogen Sensor Based on A Palladium-Coated Long-Period Fiber Grating Pair

Young-Ho Kim, Myoung-Jin Kim, Min-Su Park, Jae-Hyung Jang, Byeong-Ha Lee, and Kwang-Taek Kim  »View Author Affiliations

Journal of the Optical Society of Korea, Vol. 12, Issue 4, pp. 221-225 (2008)

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We propose a simple hydrogen detection scheme based on a Mach-Zehnder interferometer formed with a pair of palladium-coated long-period fiber gratings (LPGs). Since an LPG pair offered a fine-structured interference fringe in its transmission spectrum, the resolution as a sensor could be appreciably enhanced compared to that of a single LPG. As the palladium layer absorbed hydrogen, the effective refractive indices of the cladding modes were increased so that the interference spectrum was blue-shifted up to 2.3 nm with a wavelength sensitivity of -0.29 nm/min for 4% of hydrogen concentration.

© 2008 Optical Society of Korea

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

Original Manuscript: October 27, 2008
Revised Manuscript: November 21, 2008
Manuscript Accepted: November 21, 2008
Published: December 31, 2008

Young-Ho Kim, Myoung-Jin Kim, Min-Su Park, Jae-Hyung Jang, Byeong-Ha Lee, and Kwang-Taek Kim, "Hydrogen Sensor Based on A Palladium-Coated Long-Period Fiber Grating Pair," J. Opt. Soc. Korea 12, 221-225 (2008)

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