基于FPGA的等效采样在光时域反射计中的应用

Application of equivalent sampling based on FPGA for OTDR

通过FPGA控制延时,产生高精度采样时钟,将等效采样技术引入光时域反射计设计中。与原有基于FPGA的光时域反射计相比,在不更改电路及器件的条件下,将ADC量化精度提高20倍,从而大幅提高OTDR的空间分辨率。

By generating high-precision sampling clock in FPGA,the equivalent sampling technology is applied to the design of OTDR.Compared to the existing OTDR base on FPGA,the proposed design is able to increase the ADC quantization precision by 20 times without any change of circuit or device.As a result,the spatial resolution of the proposed OTDR is highly improved.