2 μm 波段激光在医疗、环境监测、激光雷达、遥感探测、测距领域具有十分广阔的应用，近年来成为中红外光源研究的热点。Tm，Ho:YAlO3晶体具有较好的机械和热性能，能实现多种2 μm 波段激光连续及脉冲输出。对国内外2 μm 波段Tm，Ho:YAlO3激光器的研究进展进行了归纳与总结，包括Tm/Ho 单掺YAlO3激光连续及脉冲振荡技术手段，Tm，Ho:YAlO3激光连续及脉冲振荡技术手段，高功率Tm，Ho:YAlO3激光器研究的最新进展等。技术手段涉及主动调Q、被动调Q、Tm 激光抽运Ho 激光等，并对Tm，Ho:YAlO3激光器的进一步发展及应用给予了展望。

The laser of 2 μm waveband has attracted considerable interests as mid-IR light source, due to their extensive applications in laser medicine, environmental monitoring, laser lidar, remote sensing and laser ranging. Tm,Ho:YAlO3 crystal with good mechanical and thermal properties has achieved multifold continuous and pulsed mode of 2 μm waveband lasers. The research and development on Tm,Ho:YAlO3 laser at 2 μm waveband are classified and summarized, which include the techniques of continuous-wave and pulsed mode for Tm/Ho doped YAlO3 and Tm, Ho:YALO3 laser output, and the latest development of high power Tm,Ho:YAlO3 laser. The main techniques include active Q-switch, passive Q-switch and Ho laser pumped by Tm laser. The prospect and applications of Tm,Ho:YAlO3 laser are discussed in the article.