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Title: Strain and temperature characteristics of a long-period grating written in a photonic crystal fiber and its application as a temperature-insensitive strain sensor
Authors: Zhao, CL
Xiao, L
Ju, J
Demokan, S
Jin, W 
Keywords: Long-period grating
Optical fiber sensor
Photonic crystal fiber
Strain and temperature sensitivity
Strain sensor
Issue Date: 15-Jan-2008
Publisher: Institute of Electrical and Electronics Engineers
Source: Journal of lightwave technology, 15 Jan. 2008, v. 26, no. 2, p. 220-227 How to cite?
Journal: Journal of lightwave technology 
Abstract: Strain and temperature characteristics of a long-period grating (LPG) written in an endless-single-mode photonic crystal fiber (ESM-PCF) are investigated theoretically and experimentally. By use of a dispersion factor γ, a deeper understanding of the behavior of LPG in the ESM-PCF is achieved. The negative strain sensitivity of the LPG is explained by the negative value of the dispersion factor γ. Our analysis clearly reveals the significant effect of the waveguide dispersive characteristics of the cladding modes on the strain and temperature characteristics of the LPG in the ESM-PCF. By selecting an appropriate grating period, a simple, low-cost LPG sensor with approximately zero temperature sensitivity but large strain sensitivity is realized.
ISSN: 0733-8724
EISSN: 1558-2213
DOI: 10.1109/JLT.2007.911106
Rights: © 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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