2015年6月,中国科学院理化技术研究所空间功热转换技术重点实验室采用深低温制冷技术将Tm∶YAG激光晶体冷却至130 K,采用785 nm波长半导体泵浦源抽运Tm∶YAG激光晶体,在抽运功率为4.03 W时,实现了平均功率2.12 W,单频波长2013.4 nm,线宽为10~20 KHz,基模的红外固体激光输出,功率稳定性为0.9%,经1/4波片矫正输出的线偏振光偏振度可以达到-0.22 d B以上,这是目前为止。课题组所知国际上公开报道的 In June 2015, Tm: YAG laser crystal was cooled to 130 K by deep cryogenic refrigeration using a 785 nm wavelength semiconductor pump source, and the Tm: YAG laser crystal was pumped by the Key Laboratory of Thermal Power Conversion Technology, Institute of Physics and Chemistry, Chinese Academy of Sciences At the pump power of 4.03 W, the average power is 2.12 W, the single-frequency wavelength is 2013.4 nm and the linewidth is 10 to 20 KHz. The fundamental mode infrared solid-state laser output has a power stability of 0.9% The polarization degree of the linearly polarized light output by the wave plate correction can reach -0.22 dB or more, which is by far. The group known to the world publicly reported