论文标题
具有独立控制腔长度和光栅旋转的Littrow型二极管激光器的设计
Design of a Littrow-type diode laser with independent control of cavity length and grating rotation
论文作者
论文摘要
我们提出了一种基于修改的Littrow配置的新型扩展载体二极管激光器（ECDL）。通过在二极管激光器后面放置压电换能器，通过将压电换能器定位在外部空腔模式的微调中，通过衍射光栅的旋转进行粗波的调节，从而使激光稳定性地抵抗未对准和磁滞，即使是长的外部空腔。用780 nm激光二极管测试了两个具有不同长度的外部腔的激光原型，并锁定为原子参考。在其长度变化时，我们观察到比外部空腔的自由光谱范围更宽的无模式频率可调节性。该设计非常适合原子和分子实验，要求随着时间的推移具有高水平的稳定性。
We present a novel extended-cavity diode laser (ECDL) based on a modified Littrow configuration. The coarse wavelength adjustment via the rotation of a diffraction grating is decoupled from the fine tuning of the external cavity modes by positioning a piezo transducer behind the diode laser, making the laser robust against misalignment and hysteresis even with long external cavities. Two laser prototypes with external cavities of different lengths were tested with a 780 nm laser diode, and locked to an atomic reference. We observe a mode-hop-free frequency tunability broader than the free spectral range of the external cavity upon changes of its length. The design is well suited to atomic and molecular experiments demanding a high level of stability over time.
