We demonstrated an improved optical Kerr gate with double gate pulses (D-OKG) to realize an ultrashort switching time even with a slow-response optical Kerr medium. A theoretical model of D-OKG was established and the dependence of the D-OKG performance on the relative intensity and the relative delay time of the two gate pulses was investigated. An integrated optimal condition was predicted. The D-OKG was experimentally built and optimized according to the simulation. The dependence of the D-OKG performance on the two gate pulses was confirmed. In our experiment, the achieved values for transmittance and switching time were 45 % and 150 fs, respectively. Compared to the conventional OKG, the D-OKG owns an integrated optimal performance in the femtosecond regime, and has the potential for a wide range of ultrafast optical switch applications.

我们展示了一种改进的具有双门脉冲 (D-OKG) 的光学克尔门，即使使用慢响应光学克尔介质也能实现超短切换时间。建立了D-OKG的理论模型，研究了D-OKG性能对两个门脉冲的相对强度和相对延迟时间的依赖性。预测了综合最佳条件。D-OKG 是根据模拟实验构建和优化的。确认了 D-OKG 性能对两个门脉冲的依赖性。在我们的实验中，透射率和切换时间的实现值分别为 45 % 和 150 fs。与传统的 OKG 相比，D-OKG 在飞秒范围内具有综合最佳性能，具有广泛的超快光开关应用潜力。