An external-cavity diode laser (ECDL) generally includes low-frequency tuning capability. As the tuning frequency increases, the mechanical vibration of the external-cavity inherent in the ECDL is enhanced, disrupting the mode-matching of the internal and external cavities and considerably reducing the mode-hop-free (MHF) tuning range. In order to implement a wide MHF range with high-frequency tuning, we present an active internal-cavity mode control method with an impulse response function (IRF) shaper for the dynamic mode-matching of the internal and external cavities. After introducing the IRF shaper, experimental results indicate significant improvement in the MHF range with high-frequency tuning. In addition, a maximum wavelength tuning rate of 7.56 THz/s is obtained using an uncoated laser diode with a central wavelength of 785 nm.

中文翻译：

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基于脉冲响应函数的外腔二极管激光器内外腔动态模式控制的命令整形

外腔二极管激光器 (ECDL) 通常具有低频调谐能力。随着调谐频率的增加，ECDL 固有的外腔机械振动增强，破坏了内腔和外腔的模式匹配，并显着降低了无模式跳变 (MHF) 调谐范围。为了通过高频调谐实现宽 MHF 范围，我们提出了一种具有脉冲响应函数 (IRF) 整形器的主动内腔模式控制方法，用于内腔和外腔的动态模式匹配。引入 IRF 整形器后，实验结果表明通过高频调谐显着改善了 MHF 范围。此外，使用中心波长为 785 nm 的无涂层激光二极管可获得 7.56 THz/s 的最大波长调谐率。