2 μm激光应用于激光雷达探测等领域, 对于波长的要求比较精确, 研究了激光器结构参数对准三能级Tm:YAG激光器输出波长的精细调控技术。基于侧面泵浦激光器泵浦阈值的理论模型, 通过对不同谱线的泵浦阈值进行数值模拟, 研究结果表明: 通过改变晶体温度、激光介质长度、输出耦合率等途径可实现激光器的输出波长在2.0~2.1 μm的光谱区内的精细调控。

Application of 2 μm laser in lidar systems, remote sensing, requires more accurate wavelength. Based on the analysis of the quasi-three-level side pumped Tm:YAG laser system, the oscillating conditions of this laser were predicted from the point of pump threshold with taking into account reabsorption loss. The model accurately predictes that the laser central wavelength is switchable in the range of 2.0-2.1 μm by means of different laser parameters, such as crystal temperature, the crystal length, the transmission of the output coupler.