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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 22 — Aug. 1, 2007
  • pp: 5183–5188

Study of the sensitivity of gas sensing by use of index-guiding photonic crystal fibers

Shu-Guang Li, Si-Ying Liu, Zhao-Yuan Song, Yin Han, Tong-Lei Cheng, Gui-Yao Zhou, and Lan-Tian Hou  »View Author Affiliations


Applied Optics, Vol. 46, Issue 22, pp. 5183-5188 (2007)
http://dx.doi.org/10.1364/AO.46.005183


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Abstract

We demonstrate an absorption transmission spectrum of C H 4 in a 16.9   cm long index-guiding photonic crystal fiber (PCF) fabricated in our laboratory. One of the main factors to improve the sensitivity is to increase the fraction of power in PCF cladding air holes. We study the fraction of power in PCF cladding air holes as a function of the index-guiding PCF parameters. We found that a PCF with small spacing and a large air-filling ratio has a higher fraction of power in its cladding air holes. At the same time the mode area in this PCF is small and would generate strong nonlinear effects in the fiber. If we use a PCF in which the core is formed by missing seven air holes, it is immediately obvious that the PCF used as a sensor has higher sensitivity and a larger mode area.

© 2007 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(130.6010) Integrated optics : Sensors
(290.1990) Scattering : Diffusion
(330.1880) Vision, color, and visual optics : Detection

ToC Category:
Fiber Optic Sensors

History
Original Manuscript: October 25, 2006
Revised Manuscript: April 17, 2007
Manuscript Accepted: April 18, 2007
Published: July 9, 2007

Citation
Shu-Guang Li, Si-Ying Liu, Zhao-Yuan Song, Yin Han, Tong-Lei Cheng, Gui-Yao Zhou, and Lan-Tian Hou, "Study of the sensitivity of gas sensing by use of index-guiding photonic crystal fibers," Appl. Opt. 46, 5183-5188 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-22-5183

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