Packaging process of fiber Bragg grating strain sensors for use in high-temperature applications

Alexis Méndez; Vincent P. Wnuk; Michael Fokine; Åsa Claesson; Lars-Erik Nilsson; Steve Ferguson; Tom Graver

doi:10.1117/12.629984

10 November 2005 Packaging process of fiber Bragg grating strain sensors for use in high-temperature applications

Alexis Méndez, Vincent P. Wnuk, Michael Fokine, Åsa Claesson, Lars-Erik Nilsson, Steve Ferguson, Tom Graver

Proceedings Volume 6004, Fiber Optic Sensor Technology and Applications IV; 60040E (2005) https://doi.org/10.1117/12.629984
Event: Optics East 2005, 2005, Boston, MA, United States

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.

Citation Download Citation

Alexis Méndez, Vincent P. Wnuk, Michael Fokine, Åsa Claesson, Lars-Erik Nilsson, Steve Ferguson, and Tom Graver "Packaging process of fiber Bragg grating strain sensors for use in high-temperature applications", Proc. SPIE 6004, Fiber Optic Sensor Technology and Applications IV, 60040E (10 November 2005); https://doi.org/10.1117/12.629984

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