Bending characteristics of fiber long-period gratings with cladding index modified by femtosecond laser


A femtosecond laser has been used to asymmetrically modify the cladding of fiber containing long-period gratings. Following modification, devices in single-mode fiber are shown to be capable of sensing the magnitude and direction of bending in one plane by producing blue and red wavelength shifts depending upon the orientation of the bend. The resulting curvature sensitivities were -1.62 and +3.82 nm·m. Devices have also been produced using an elliptical core fiber to study the effects of the cladding modification on the two polarization eigenstates. A cladding modification applied on the fast axis of the fiber is shown to affect the light in the fast axis much more significantly than the light in the orthogonal state; this behavior may ultimately lead to a sensor capable of detecting the direction of bending in two dimensions for applications in shape sensing. © 2006 IEEE.

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Divisions: College of Engineering & Physical Sciences
Additional Information: ©2006 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.
Uncontrolled Keywords: curvature measurement,long-period fiber gratings,polarization dependence,Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics
Publication ISSN: 0733-8724
Last Modified: 02 Jan 2024 08:10
Date Deposited: 11 Aug 2010 14:03
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://ieeexplo ... rnumber=1667836 (Publisher URL)
PURE Output Type: Article
Published Date: 2006-08-01
Authors: Allsop, Thomas D.P. (ORCID Profile 0000-0001-8905-9014)
Dubov, Mykhaylo (ORCID Profile 0000-0002-6764-683X)
Martínez, Amós
Floreani, Filip
Khrushchev, Igor
Webb, David J. (ORCID Profile 0000-0002-5495-1296)
Bennion, Ian



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