Krause F, Benkler E, Nölleke C, Leisching P, Sterr U
Appl Opt. 2020 Dec 1;59(34):10808-10812. doi: 10.1364/AO.409308.
We present a compact iodine-stabilized laser system at 633 nm, based on a distributed-feedback laser diode. Within a footprint of 27×15, the system provides 5 mW of frequency-stabilized light from a single-mode fiber. Its performance was evaluated in comparison to Cs clocks representing primary frequency standards, realizing the SI unit Hz via an optical frequency comb. With the best suited absorption line, the laser reaches a fractional frequency instability below 10 for averaging times above 10 s. The performance was investigated at several iodine lines, and a model was developed to describe the observed stability on the different lines.
我们展示了一种基于分布反馈激光二极管的紧凑型633纳米碘稳定激光系统。在27×15的占地面积内，该系统从单模光纤提供5毫瓦的频率稳定光。通过光学频率梳将其性能与代表基本频率标准的铯钟进行比较评估，实现了国际单位制单位赫兹。使用最适合的吸收线，对于平均时间超过10秒的情况，该激光器的分数频率不稳定度低于10⁻⁹。在几条碘吸收线上研究了其性能，并开发了一个模型来描述在不同吸收线上观察到的稳定性。
