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在光纤布拉格光栅测温网络中,需要对温度测试系统进行校正,因为在测试过程中,光纤中的回波波长会被展宽,同时受到影响而发生偏移,所以需要有必要的校正才能获得准确的温度测试数据。通过理论分析和计算,对波长的偏移校正方法进行了设计,并应用于实验中,实验结果显示,测试温度与回波中心波长的函数关系为每40pm对应大约1.0℃的变化,系统测试结果稳定。
In fiber Bragg grating temperature measurement networks, the temperature test system needs to be calibrated as the wavelength of the echo in the fiber is broadened and offset at the same time during the test, so the necessary corrections are needed to obtain accurate The temperature test data. Through the theoretical analysis and calculation, the wavelength offset correction method is designed and applied to the experiment. The experimental results show that the test temperature is a function of the echo center wavelength as a function of about 1.0 ° C per 40pm. The system test results stable.