Abstract

We have studied the spectral and dynamic characteristics of quantum cascade lasers emitting in the long-wavelength infrared range. It is shown that lasers with a short cavity (~1 mm) make it possible to obtain frequency combs in a very wide spectral range. We have investigated the spectral dynamics in the frequency comb generation regime. It is demonstrated that the intensity of longitudinal laser modes varies during a pump pulse propagation. We have observed simultaneous generation of all longitudinal modes of a frequency comb over a pump pulse segment with a constant amplitude.

中文翻译：

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量子级联激光器在长波长红外范围内产生频率梳的光谱动力学

摘要

我们已经研究了在长波长红外范围内发射的量子级联激光器的光谱和动态特性。结果表明，具有短腔（〜1 mm）的激光器可以在很宽的光谱范围内获得频率梳。我们研究了频率梳生成方式中的频谱动力学。结果表明，纵向激光模式的强度在泵浦脉冲传播过程中会发生变化。我们已经观察到在泵浦脉冲段上以恒定幅度同时产生频率梳的所有纵向模式。