CO2 laser-grooved long period fiber grating temperature sensor system based on intensity modulation.
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.
Wang
Yi-Ping
YP
Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China. ypwang@china.com
Wang
Dong Ning
DN
Jin
Wei
W