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Proceedings Paper

Ammonia sensing using a fibre optic long period grating with a porous nanostructured coating formed from silica nanospheres
Author(s): S. Korposh; W. Batty; S. Kodaira; S.-W. Lee; S. W. James; S. M. Topliss; R. P. Tatam
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Paper Abstract

The transmission spectrum of a fibre optic long period grating (LPG) coated with a porous multilayer coating of thickness of order 400 nm formed from silica nanospheres is shown to exhibit a strong sensitivity to the infusion of a functional, chemically sensitive material into the coating. Subsequently, the transmission spectrum of the LPG shows sensitivity to changes in the properties of the functional material when exposed to a particular chemical species in an aqueous solution. The operation of such a device as an ammonia sensor is demonstrated, exhibiting 1 ppm sensitivity. The sensing mechanisms are discussed.

Paper Details

Date Published: 8 September 2010
PDF: 4 pages
Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 76531D (8 September 2010); doi: 10.1117/12.866326
Show Author Affiliations
S. Korposh, Cranfield Univ. at Kitakyushu (Japan)
The Univ. of Kitakyushu (Japan)
W. Batty, Cranfield Univ. at Kitakyushu (Japan)
S. Kodaira, The Univ. of Kitakyushu (Japan)
S.-W. Lee, The Univ. of Kitakyushu (Japan)
S. W. James, Cranfield Univ. (United Kingdom)
S. M. Topliss, Cranfield Univ. (United Kingdom)
R. P. Tatam, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 7653:
Fourth European Workshop on Optical Fibre Sensors
José Luís Santos; Brian Culshaw; José Miguel López-Higuera; William N. MacPherson, Editor(s)

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