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采用光纤光栅悬臂梁线性调谐技术 ,提出了利用调谐滤波技术对光纤光栅复用传感信号进行检测的方案 ,在分析其基本工作原理的基础上 ,实验研究了其波分复用传感特性 ,传感测量的结果与光谱分析仪直接测量的结果基本一致。传感器的波长分辨率主要取决于系统的最小可探测光功率 ,由于采用了高灵敏度的光电测量系统 ,传感测量的波长分辨率可达 0 .0 0 5nm ,应变分辨率可达 5.7× 10 - 6 。
By using fiber grating cantilever beam linear tuning technology, a scheme of using tuned filter technology to detect fiber grating multiplexed sensing signal is proposed. Based on the analysis of its basic working principle, the WDM sensing characteristics are experimentally studied. The result of the sensing measurement is basically the same as that of the direct measurement by the spectrum analyzer. The wavelength resolution of the sensor mainly depends on the minimum detectable optical power of the system. Due to the high sensitivity photoelectric measurement system, the wavelength resolution of the sensing measurement can reach 0,050 nm and the strain resolution can reach 5.7 × 10 - 6.