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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 32 — Nov. 10, 2007
  • pp: 7805–7810

Optical D-fiber-based volatile organic compound sensor

John D. Gordon, Tyson L. Lowder, Richard H. Selfridge, and Stephen M. Schultz  »View Author Affiliations


Applied Optics, Vol. 46, Issue 32, pp. 7805-7810 (2007)
http://dx.doi.org/10.1364/AO.46.007805


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Abstract

A fiber-optic sensor used to detect volatile organic compounds is described. The sensor consists of a single-mode D-fiber with a 2.5   μm polydimethylsiloxane layer. The layer is applied to the fiber flat after removal of a section of the fiber's cladding to increase evanescent interaction of the light with the layer. Absorption of volatile organic compounds into the polymer alters the refractive index of the layer, resulting in a birefringent change of the fiber. This change is observed as a shift in polarization of the light carried by the fiber. The sensor has a short length of 3 cm and a response time of around 1 s. The sensor is naturally reversible and gives an exponential response for gas and liquid concentrations of dichloromethane and acetone, respectively.

© 2007 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(130.6010) Integrated optics : Sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 27, 2007
Manuscript Accepted: August 31, 2007
Published: November 1, 2007

Citation
John D. Gordon, Tyson L. Lowder, Richard H. Selfridge, and Stephen M. Schultz, "Optical D-fiber-based volatile organic compound sensor," Appl. Opt. 46, 7805-7810 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-32-7805

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