Packaging of surface relief fiber Bragg gratings for use as strain sensors at high temperature

Richard H. Selfridge; Stephen M. Schultz; Tyson L. Lowder; Vincent P. Wnuk; Alexis Méndez; Steve Ferguson; Tom Graver

doi:10.1117/12.657661

30 March 2006 Packaging of surface relief fiber Bragg gratings for use as strain sensors at high temperature

Richard H. Selfridge, Stephen M. Schultz, Tyson L. Lowder, Vincent P. Wnuk, Alexis Méndez, Steve Ferguson, Tom Graver

Proceedings Volume 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications; 616702 (2006) https://doi.org/10.1117/12.657661
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, 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 surface relief fiber Bragg gratings (SR-FBG). These gratings, instead of being written in the core of a photosensitive or hydrogen-loaded fiber, are formed by introducing a periodic surface relief - through photolithographic and etching processes - in the cladding above the core. Samples of SR-FBGs were successfully encapsulated and mounted onto metal shims. The packaged sensors displayed a linear response with temperature and a sensitivity factor of 11pm/°C.

Citation Download Citation

Richard H. Selfridge, Stephen M. Schultz, Tyson L. Lowder, Vincent P. Wnuk, Alexis Méndez, Steve Ferguson, and Tom Graver "Packaging of surface relief fiber Bragg gratings for use as strain sensors at high temperature", Proc. SPIE 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications, 616702 (30 March 2006); https://doi.org/10.1117/12.657661

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