In article number 2000498, Hua Li and co‐workers demonstrate the active stabilization of terahertz quantum cascade laser (QCL) dual‐comb sources employing a phase locking technique. Although only one of the dual‐comb lines is phase locked in this experiment, the phase noise of other dual‐comb lines close to the phase‐locked line is significantly reduced. Furthermore, it is experimentally demonstrated that the terahertz QCL comb without a control of the repetition rate can produce pulsed‐type waveforms. The demonstrated approach shows potential applications for fast gas sensing and spectroscopy in the terahertz frequency range.

中文翻译：

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双梳状激光源：采用锁相技术的太赫兹半导体双梳状激光源的主动稳定（Laser Photonics Rev. 15（4）/ 2021）

华立及其同事在文章编号2000498中展示了采用锁相技术的太赫兹量子级联激光器（QCL）双梳状光源的有源稳定。尽管在此实验中只有一条双梳状线被锁相，但是靠近锁相线的其他双梳状线的相位噪声却大大降低了。此外，实验证明，在不控制重复频率的情况下，太赫兹QCL梳可产生脉冲型波形。演示的方法展示了太赫兹频率范围内快速气体传感和光谱学的潜在应用。