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)m Hz的激光线宽和7×10~(-10)W的激光功率输出。 A bad cavity laser based on Raman transition of cesium atoms is proposed. The laser builds an optical cavity model based on low-precision resonators and collective effects. By studying the theory of laser linewidth, several factors that affect laser with narrow linewidth are obtained, and then the way to achieve narrow linewidth is analyzed. The collective effect is also characterized by spin-spin correlation coefficient. Based on a series of theoretical analyzes, it is found that a cesium atom - based bad - cavity Raman laser can achieve a laser linewidth of 98 × 10 ~ (-2) m Hz and a laser power output of 7 × 10 ~ (-10) W.