雷电流测量是研究雷电的一个重要部分。为此，本文研究了一种用于测量雷电流的全光纤电流传感器。首先，介绍了光纤电流传感器的基本原理及结构组成；其次，在实验室中对该传感器的响应速度、测量精度及测量范围等性能指标进行了测试。结果表明，该传感器的响应速度为微秒级，可测量范围在 1 kA～100 kA，动态范围大于 40 dB，测量误差小于 5%，测量波形与标准的 Pearson电流探头测试波形相比一致性较好，该研究为雷电流测量提供了一种新方法。

It is an important part for studying lightning to measure lightning current. Consequently, this paper studied an all-fiber optical current transformer for measuring lightning currents. Firstly, the basic principle and structure of the all-fiber optical current transformer were introduced. Then, the performances including the response speed, mea-surement accuracy and measurement range were tested in the laboratory. The results show that the response speed of the sensor is in microsecond. The measurable range is over 1 kA～100 kA. The dynamic range is greater than 40 dB and the measurement error is less than 5%. The measurement waveform of all-fiber optical current transformer coincides with that of standard Pearson current probe. The paper provides a new method for lightning current measurement.