全固态单频激光器相干长度长、谱线宽度窄、效率高、寿命长，在科研、**及工业领域得到越来越广泛的应用。由全固态单频激光器的核心——单纵模选择技术出发，结合扩展单频激光功率/能量的放大器技术，分析归纳了国内外全固态单频激光器的主流技术方案及研究进展，并对其进一步发展给予了展望。

All-solid-state single-frequency lasers with long coherent length, narrow line width, high efficiency and long life time have been widely used in scientific, military and industrial fields in recent years. The key techniques to achieve the all-solid-state single-frequency laser output and improve the laser performance are single longitudinal mode selection and power amplification. The domestic and international progress in such lasers and the mainstream technology programs are analyzed and summarized. In addition, the prospect of the all-solid-state single-frequency laser is discussed.