The use of a Bragg grating as a temperature sensor
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Date
2000
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Publisher
University of New Brunswick
Abstract
A fiber Bragg grating has a periodic disturbance in the index of refraction of the core of an optical fiber. It can be used as a temperature sensor due to the change in the grating period that occurs because a thermal expansion. Fiber Bragg gratings temperature sensing system would be of great use in many applications, particularly in medical settings.
The goal of this project was to construct and test a temperature sensor using a fiber Bragg grating as the sensing component. The system was successfully tested for use in the range of 30°C to 45°C. A method of isolating the grating was devised, such that it would not be exposed to environmental factors other than those desired. A measurement precision of 0.1 °C was successfully developed.