端面抽运Tm,Ho∶YLF连续激光器的参数优化与实验研究

Laser parameter optimization and experimental study of end-pumped continuous wave Tm,Ho∶YLF lasers

研究了激光二极管端面抽运Tm,Ho∶YLF连续激光器的输出特性,并对激光器的参数进行了优化.在考虑能量传递上转换的前提下,通过准三能级速率方程推导出了连续抽运Tm,Ho∶YLF激光器输出功率与抽运功率关系的表达式.对激光晶体的粒子掺杂浓度、晶体长度、激光束腰半径与抽运光束腰半径比值以及输出镜透过率等激光器参数进行了优化.实验上得到了激光输出功率随抽运功率的变化关系,并将其与理论结果进行了比较,发现比较吻合,从而验证了理论模型的合理性.

The output performance of a laser diode end-pumped continuous wave Tm,Ho∶YLF laser is studied and the laser parameters are optimized. Based the quasi-three-level rate equations,the relation formulus between the output power and the input power is deduced with consideration of the energy transfer up-conversion. The laser parameters such as the concentration of doped ions,the crystal length,the pump-to-mode size ratio and the transmittance of output coupler are optimized by numerical analysis. The output power as a function of pump power is obtained in experiment. Comparison of experimental and theoretical results shows that the theoretical results are valid.