2μm激光作为高相干辐射光源,在激光医疗、激光雷达、光电对抗、材料加工等领域有非常重要的应用价值。通过建立考虑能量传递上转换效应的Tm:YLF激光器速率方程,从而分析了能量传递上转换(Energy Transfer Upconversion,ETU)效应对Tm:YL...2μm激光作为高相干辐射光源,在激光医疗、激光雷达、光电对抗、材料加工等领域有非常重要的应用价值。通过建立考虑能量传递上转换效应的Tm:YLF激光器速率方程,从而分析了能量传递上转换(Energy Transfer Upconversion,ETU)效应对Tm:YLF激光器输出特性的影响;仿真分析双端偏振泵浦Tm:YLF晶体泵浦光分布情况。基于上述仿真分析结果,为获得更高的激光输出功率,采用单LD双端同向π偏振泵浦Tm:YLF激光器方法,提高增益介质的增益效果;当注入功率为47.43 W时,实现了稳定的最大激光输出功率为15.23 W,中心波长为1 907.46 nm,输出线宽为1.62 nm,对应光-光转换效率为32.11%,斜率效率为37.24%。展开更多
A narrow linewidth stable high-power continuous-wave 3.5% Tin3+ doped LiYF4 (Tm:YLF) laser is reported. By using dual F P etalons and three Tm:YLF rods in a cavity, laser output of ~60 W at 1907.7nm is obtained w...A narrow linewidth stable high-power continuous-wave 3.5% Tin3+ doped LiYF4 (Tm:YLF) laser is reported. By using dual F P etalons and three Tm:YLF rods in a cavity, laser output of ~60 W at 1907.7nm is obtained with a slope efficiency of 34.8%. The M2 factor is found to be ~2.0 under an output power of 30 W. In addition, the relaxation oscillation and efficiency of the Tm:YLF laser are also studied. The relaxation oscillation of the Tm:YLF laser is improved obviously by setting the ratio of pump beam to oscillating laser beam as ~1.5:1 and the efficiency is increased in comparison with the ratio of ~1.3:1.展开更多
文摘A narrow linewidth stable high-power continuous-wave 3.5% Tin3+ doped LiYF4 (Tm:YLF) laser is reported. By using dual F P etalons and three Tm:YLF rods in a cavity, laser output of ~60 W at 1907.7nm is obtained with a slope efficiency of 34.8%. The M2 factor is found to be ~2.0 under an output power of 30 W. In addition, the relaxation oscillation and efficiency of the Tm:YLF laser are also studied. The relaxation oscillation of the Tm:YLF laser is improved obviously by setting the ratio of pump beam to oscillating laser beam as ~1.5:1 and the efficiency is increased in comparison with the ratio of ~1.3:1.