Decay Characteristic of Fiber Bragg Grating and Fabrication of High Temperature Resistance Grating Temperature Sensor

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Abstract:

Thermal decay characteristic of fiber Bra gg Grating (FBG) written into hydrogen-loaded optical fiber by exposing to ultraviolet (UV) laser irradiation through a phase mask is presented and experimentally demonstrated. Results of the experiment show that the FBG has a high temperature sustainability of 600 °C with main taining 26.6% of initial reflected light power after annealing for 24 hours. High temperature resistance grating based on the hydrogen-loaded conventional FBG has been fabrication and the shift of the Bragg wavelength w ith temperature is investigated over a range from -60 °C to 700 °C. The relationship between the wavelength of the FBG and te mperature indicates its feasibility as temperature sensor for high temperature.

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30-33

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January 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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