光纤Bragg光栅的温度传感研究

Temperature-Sensed Researches of Fiber Bragg Grating

本文分析了光纤 Bragg光栅在受到温度调制时的滤波特性。与温度对光纤光栅反射谱波长的影响相比 ,对其带宽的影响可忽略。实验中 ,光纤光栅受温度的调制 ,并且其反射谱由光谱仪记录。结果表明该光纤 Bragg光栅对温度产生的波长偏移是 0 .0 0 991nm/℃。值得注意的是实验中最大标准误差为 0 .0 3nm,能满足目前波分复用技术所需的信道精度。

This analyzed the filtering characteristics of fiber Bragg gratings modulated by temperature. In comparison with the effect to temperature to the wavelength of reflected spectrum, the effect of strain to the bandwidth of reflected spectrum could be neglected. In the experiment, the reflected spectrum of grating was modulated by the temperature, and could be measured by the optical analyzer. The result indicated that the response of wavelength shift of the grating to the temperature was 0.009 91 nm/℃. It is worth noting that the maximum standard error was 0.03 nm, and met the precision of the wavelength channel in the currently WDM technique.