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Optical Engineering • Open Access

Long-period gratings in special geometry fibers for high-resolution and selective sensors
Author(s): Lars Glavind; John Canning; Shaorui Gao; Kevin J. Cook; Gang-Ding Peng; Yanhua Luo; Bjarne Funch Skipper; Martin V. Kristensen

Paper Abstract

Advantages for sensor applications of long-period gratings (LPGs) in special optical fibers are reported. Two consecutive LPGs separated by 60 to 100 mm interfere to improve the resolution and reduce noise in a highly doped fiber with inner cladding and in a D-shaped fiber. These gratings provide good contrast to increase the resolution for sensing applications, with or without access to the surroundings along the fiber. The mode profiles of the devices were characterized experimentally to gain deeper insight into the improved functionality.

Paper Details

Date Published: 25 June 2014
PDF: 7 pages
Opt. Eng. 53(6) 066109 doi: 10.1117/1.OE.53.6.066109
Published in: Optical Engineering Volume 53, Issue 6
Show Author Affiliations
Lars Glavind, Vestas Wind Systems A/S (Denmark)
Aarhus Univ. (Denmark)
John Canning, The Univ. of Sydney (Australia)
Shaorui Gao, The Univ. of Sydney (Australia)
Zhejiang Univ. (China)
Kevin J. Cook, The Univ. of Sydney (Australia)
Gang-Ding Peng, The Univ. of New South Wales (Australia)
Yanhua Luo, The Univ. of New South Wales (Australia)
Bjarne Funch Skipper, Aarhus Univ. (Denmark)
Martin V. Kristensen, Aarhus Univ. (Denmark)

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