The conductivity of the plasma channel are shown in detail by electrical detecting method on the conditions of different focal lengths, different laser energies and polarities of the external voltage.

• 摘要通过电学探测法，采用不同焦距的聚焦透镜，在不同激光能量、不同极性外加电压的条件下，对大气中的飞秒激光自聚焦等离子体电离通道特性进行了实验研究。