论文标题
具有$ \ mathrm {mod} \，σ_ {\ rm y} = 3 \ times10^{ - 16} $的不稳定性的可运输询问激光系统
A transportable interrogation laser system with an instability of $\mathrm{mod}\,σ_{\rm y} = 3\times10^{-16}$
论文作者
论文摘要
我们提出了一个询问激光系统，用于在698 nm处运行的可运输跨质晶状体时钟，该时钟基于超低膨胀玻璃参考腔。可运输性是通过在12厘米长的参考腔中实现刚性，紧凑和振动不敏感的安装，可维持高达50 g的冲击。该腔位于优化的支持点上，该支持点独立限制了所有自由度。这种安装概念对于长度$ l $胜于直径$ d $ $ l/d> 1 $的腔尤其有益。通常，大$ L $有助于减少热噪声引起的激光频率不稳定，而小$ d $会导致小腔体积。评估了频率不稳定性，到达其热噪声底$ \ mathrm {mod} \，σ_{\ rm y} \大约3 \ times 10^{ - 16} $，平均时间为0.5 s和10 s。激光系统在几项现场研究中成功运行。
We present an interrogation laser system for a transportable strontium lattice clock operating at 698 nm, which is based on an ultra-low-expansion glass reference cavity. Transportability is achieved by implementing a rigid, compact, and vibration insensitive mounting of the 12 cm-long reference cavity, sustaining shocks of up to 50 g. The cavity is mounted at optimized support points that independently constrain all degrees of freedom. This mounting concept is especially beneficial for cavities with a ratio of length $L$ over diameter $D$ $L/D>1$. Generally large $L$ helps to reduce thermal noise-induced laser frequency instability while small $D$ leads to small cavity volume. The frequency instability was evaluated, reaching its thermal noise floor of $\mathrm{mod}\,σ_{\rm y} \approx 3 \times 10^{-16}$ for averaging times between 0.5 s and 10 s. The laser system was successfully operated during several field studies.
