Versatile, high-power 460 nm laser system for Rydberg excitation of ultracold potassium.
Versatile, high-power 460 nm laser system for Rydberg excitation of ultracold potassium.
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DOI：
10.1364/oe.25.014829
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发表时间：
2017-02
期刊：
影响因子：
3.8
通讯作者：
A. Arias;S. Helmrich;C. Schweiger;Lynton Ardizzone;G. Lochead;Shannon Whitlock
中科院分区：
文献类型：
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作者：
A. Arias;S. Helmrich;C. Schweiger;Lynton Ardizzone;G. Lochead;Shannon Whitlock
我们推出了一种多功能激光系统，可提供超过 1.5 W 的窄带光，可在 455-463 nm 范围内调谐。它由商用钛蓝宝石激光器组成，该激光器使用谐振腔二次谐波生成进行倍频，并稳定到外部参考腔。我们展示了宽波长调谐范围以及窄线宽和低强度噪声。该激光系统非常适合原子物理实验，例如主量子数 n > 18 的钾原子的里德堡态的双光子激发。为了证明这一点，我们对超冷钾气体进行了双光子光谱，其中我们观察到与 35s1/2 态相对应的电磁感应透明共振，并验证了该激光系统的长期稳定性。 激光系统。此外，通过在磁光陷阱中进行光谱分析，我们观察到与由于小电场而可访问的 s、p、d 和高 l 态的激发相对应的强损耗特征。
We present a versatile laser system which provides more than 1.5 W of narrowband light, tunable in the range from 455-463 nm. It consists of a commercial titanium-sapphire laser which is frequency doubled using resonant cavity second harmonic generation and stabilized to an external reference cavity. We demonstrate a wide wavelength tuning range combined with a narrow linewidth and low intensity noise. This laser system is ideally suited for atomic physics experiments such as two-photon excitation of Rydberg states of potassium atoms with principal quantum numbers n > 18. To demonstrate this we perform two-photon spectroscopy on ultracold potassium gases in which we observe an electromagnetically induced transparency resonance corresponding to the 35s1/2 state and verify the long-term stability of the laser system. Additionally, by performing spectroscopy in a magneto-optical trap we observe strong loss features corresponding to the excitation of s, p, d and higher-l states accessible due to a small electric field.