Long-period gratings in special geometry fibers for high-resolution and selective sensors

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 go...

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Published in:Optical engineering 2014-06, Vol.53 (6), p.066109-066109
Main Authors: Glavind, Lars, Canning, John, Gao, Shaorui, Cook, Kevin, Peng, Gang-Ding, Luo, Yanhua, Skipper, Bjarne Funch, Kristensen, Martin
Format: Article
Language:English
Subjects:
Diffraction gratings
Doped fibers
Fibers
Gain
Gratings (spectra)
LPG
Optical fibers
Sensors
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container_end_page 066109
container_issue 6
container_start_page 066109
container_title Optical engineering
container_volume 53
creator Glavind, Lars
Canning, John
Gao, Shaorui
Cook, Kevin
Peng, Gang-Ding
Luo, Yanhua
Skipper, Bjarne Funch
Kristensen, Martin
description 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.
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source SPIE Digital Library
subjects Diffraction gratings
Doped fibers
Fibers
Gain
Gratings (spectra)
LPG
Optical fibers
Sensors
title Long-period gratings in special geometry fibers for high-resolution and selective sensors
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