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Journal of Sensors
Volume 2016, Article ID 3598634, 14 pages
Review Article

Arc-Induced Long Period Fiber Gratings

1Instituto Politécnico de Viana do Castelo, Escola Superior de Tecnologia e Gestão, Avenida do Atlântico, 4900-348 Viana do Castelo, Portugal
2Center for Applied Photonics (CAP), INESC TEC (Formerly Known as UOSE, INESC-Porto), Rua do Campo Alegre 687, 4169-007 Porto, Portugal

Received 28 October 2015; Revised 22 December 2015; Accepted 31 December 2015

Academic Editor: Stefania Campopiano

Copyright © 2016 Gaspar Rego. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Long period fiber gratings produced by the electric arc technique have found an increasing interest by the scientific community due to their ease to fabricate, virtually enabling the inscription in any kind of fiber, low cost, and flexibility. In 2005 we have presented the first review on this subject. Since then, important achievements have been reached such as the identification of the mechanisms responsible for gratings formation, the type of symmetry, the conditions to increase fabrication reproducibility, and their inscription in the turning points with grating periods below 200 μm. Several interesting applications in the sensing area, including those sensors working in reflection, have been demonstrated and others are expected, namely, related to the monitoring of extreme temperatures, cryogenic and high temperatures, and high sensitivity refractometric sensors resulting from combining arc-induced gratings in the turning points and the deposition of thin films in the transition region. Therefore, due to its pertinence, in this paper we review the main achievements obtained concerning arc-induced long period fiber gratings, with special focus on the past ten years.