光纤光栅温度传感理论与实验

从光纤光栅温度传感模型出发，理论分析研究了光纤光栅的温度传感特性，推导了光纤光栅温度传感的一阶、二阶和有效线性灵敏度系数的解析式，计算了各灵敏度系数的理论值，实验得到了反射波长与温度的二次多项式，对比分析了理论与实验结果，讨论了石英的力学参数对光纤光栅温度传感特性的影响、反射波长与温度的线性及非线性的适用范围等问题. 关键词： 光纤光栅 光纤传感 温度传感

Theory and experiment about in-fiber Bragg grating temperature sensing

A theoretical method of in-fiber Bragg grating temperature sensing has been proposed. Based on a temperature sensing model of in-fiber Bragg gratings, it was deduced that the analytical formulae of first-order and second-order and effective linear sensitivity coefficients of in-fiber Bragg grating temperature sensing. The theoretical values of each sensitivity coefficient was calculated. Conic multinomial has been obtained by experiment. The results of theory and experiment were compared and analyzed. Furthermore, the influence of quartzose mechanical parameters on temperature sensing characters of in-fiber Bragg gratings and the application range of linear and nonlinear relations of reflected wavelength versus temperature were also discussed.