CO2 laser-grooved long period fiber grating temperature sensor system based on intensity modulation |
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Authors: | Wang Yi-Ping Wang Dong Ning Jin Wei |
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Affiliation: | Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China. ypwang@china.com |
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Abstract: | A long period fiber grating (LPFG) temperature sensor system based on intensity modulation is developed. The LPFG employed is fabricated by the use of a focused CO2 laser beam to carve periodic grooves on the fiber. The temperature measurement resolution of up to 0.1 degrees C has been obtained within the temperature range between 20 degrees C and 100 degrees C. The system uses a simple intensity measurement method and exhibits the advantages of convenient intensity measurement, double temperature sensitivity, high resolution, simple configuration, and low cost. |
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