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Proceedings Paper

Packaging process of fiber Bragg grating strain sensors for use in high-temperature applications
Author(s): Alexis Méndez; Vincent P. Wnuk; Michael Fokine; Åsa Claesson; Lars-Erik Nilsson; Steve Ferguson; Tom Graver
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Paper Abstract

In this paper, we report the development of a new bonding agent and method for the surface mounting of optical fiber Bragg grating (FBG) strain and temperature sensors for use in high temperature environments--where there is a presence of water, moisture, dust, susceptibility to corrosion and/or elevated temperatures up to 800°C. To ensure a stable reflectivity response of FBGs and their survival at elevated temperatures, we are using chemical composition gratings (CCGs). The refractive index modulation in these gratings is caused by a chemical change, which results in a higher activation energy and stable behavior up to 1000°C. Samples of CCGs were successfully encapsulated and mounted onto metal shims. The packaged sensors were tested for strain (+/- 1000με) and temperature (to +400 °C) response. The encapsulated sensors display a linear response with an increase in the temperature sensitivity of the FBG, with a factor of ~ 28.34pm/°C, and a strain gauge factor of 1.7pm/με.

Paper Details

Date Published: 10 November 2005
PDF: 7 pages
Proc. SPIE 6004, Fiber Optic Sensor Technology and Applications IV, 60040E (10 November 2005); doi: 10.1117/12.629984
Show Author Affiliations
Alexis Méndez, MCH Engineering, LLC (United States)
Vincent P. Wnuk, Hitec Products Inc. (United States)
Michael Fokine, Acreo AB (Sweden)
Åsa Claesson, Acreo AB (Sweden)
Lars-Erik Nilsson, Acreo AB (Sweden)
Steve Ferguson, Micron Optics, Inc. (United States)
Tom Graver, Micron Optics, Inc. (United States)

Published in SPIE Proceedings Vol. 6004:
Fiber Optic Sensor Technology and Applications IV
Michael A. Marcus; Brian Culshaw; John P. Dakin, Editor(s)

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