论文部分内容阅读
激光器的频率漂移对相位敏感光时域反射计的定位有重要的影响,其直接导致定位的信噪比下降。提出一种频谱分析结合选取特征频段的定位算法,在算法中通过选取合适的特征频段,对影响系统定位的激光器频漂进行误差抑制。特征频段的选取通过实验信噪比的高低决定。通过实验验证,结果显示该算法提高了系统定位性能并进一步提高了信噪比。
The frequency drift of the laser has an important influence on the location of the phase sensitive optical time domain reflectometer, which directly leads to the decrease of the signal-to-noise ratio of the location. A frequency spectrum analysis combined with the selection of the feature band positioning algorithm is proposed. In the algorithm, by selecting the appropriate feature band, the error of the laser frequency drift affecting the system positioning is suppressed. The selection of the characteristic frequency band is decided by the experimental SNR. The experimental results show that this algorithm improves the system positioning performance and further improves the signal-to-noise ratio.