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Journal of Sensors
Volume 2009, Article ID 607647, 12 pages
Review Article

Planar Bragg Grating Sensors—Fabrication and Applications: A Review

1Stratophase Ltd, Unit A7, The Premier Centre, Premier Way, Romsey SO51 9DG, UK
2Theoretical and Physical Chemistry Institute, The National Hellenic Research Foundation (NHRF), 48 Vassileos Constantinou Avenue, 11635 Athens, Greece

Received 5 April 2009; Accepted 13 July 2009

Academic Editor: Valerio Pruneri

Copyright © 2009 I. J. G. Sparrow et al. 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.


We discuss the background and technology of planar Bragg grating sensors, reviewing their development and describing the latest developments. The physical operating principles are discussed, relating device operation to user requirements. Recent performance of such devices includes a planar Bragg grating sensor design which allows refractive index resolution of 1 . 9 × 1 0 6  RIU and temperature resolution of 0 . 0 3 C . This sensor design is incorporated into industrialised applications allowing the sensor to be used for real time sensing in intrinsically safe, high-pressure pipelines, or for insertion probe applications such as fermentation. Initial data demonstrating the ability to identify solvents and monitor long term industrial processes is presented. A brief review of the technology used to fabricate the sensors is given along with examples of the flexibility afforded by the technique.