The results of a study of pulse duration of superradiance on molecular nitrogen ions in air under different conditions of focusing a femtosecond laser pulse with a wavelength of 950 nm are presented. The active-medium parameters are analyzed and a mechanism is proposed for formation of a picosecond superradiance pulse at a femtosecond seed-pulse duration.

中文翻译：

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空气激光等离子体中分子氮离子超辐射的脉冲持续时间

介绍了在聚焦波长为 950 nm 的飞秒激光脉冲的不同条件下，对空气中分子氮离子的超辐射脉冲持续时间的研究结果。分析了有源介质参数，并提出了在飞秒种子脉冲持续时间内形成皮秒超辐射脉冲的机制。