提出一种基于铯原子拉曼跃迁的坏腔激光器。该激光器基于低精细度的共振腔和集体效应来构建光学坏腔模型。通过研究激光线宽理论，得到影响窄线宽激光的几个要素，进而分析实现窄线宽的途径,并使用自旋-自旋相关系数表征集体效应。根据一系列理论分析，发现基于铯原子的坏腔拉曼激光器可实现98×10^-2 mHz 的激光线宽和7×10^-10 W 的激光功率输出。

We propose a bad-cavity laser based on the Raman transition of cesium-133 atoms that collectively emit photons into the wide mode of a low finesse resonator, which is known as the optical bad-cavity regime. The spinspin correlation, which characterizes the collective effect, is demonstrated. We theoretically predict that the optical radiation has an extremely narrow linewidth in the 98×10^-2 mHz range, and that a power level of 7×10^-10 W is possible.