双边滤波器在OTDR中的应用

Application of bilateral filter in OTDR

光时域反射仪(OTDR)在使用小脉宽测试时,曲线信噪比低、动态不足,若采用大脉宽测试,则盲区增大,不利于事件点分析。针对此问题,介绍了双边滤波器原理,引入双边滤波器对OTDR测试数据滤波。实验结果表明:双边滤波器在提高动态范围的同时可保持盲区不展宽,能够更好的提升OTDR产品性能。

When optical time domain reflectometer(OTDR)uses small pulse width test,its curve signal-to-noise ratio is low and dynamic is insufficient.If large pulse width test is used,the blind area will increase,which is not conducive to event point analysis.To solve this problem,the principle of two-sided filter is introduced,and the two-sided filter is introduced to filter the test data of OTDR.The experimental results show that the two-sided filter can improve the performance of OTDR products while increasing the dynamic range.