Nd:YAG薄片激光器热致波前畸变

 理论分析了激光二极管端面泵浦薄片Nd:YAG 激光器的激光介质热效应对波前相位分布的影响，给出了薄片激光器波前热畸变的计算公式。数值模拟了理想均匀泵浦及4阶超高斯泵浦下的波前分布，分析了介质厚度和泵浦均匀性与波前畸变量的关系。研究表明，介质越薄，激光泵浦光均匀性越好，泵浦功率密度越小，激光波前畸变越小；与介质厚度、泵浦功率密度相比，泵浦光光强分布对波前的影响更为显著。

Simulation of thermal effect on beam distortion in Nd:YAG thin disk laser

The thermal effect of the medium in the end-pumped Nd:YAG thin-disk laser on the wavefront distribution was studied,and the calculation expression of the beam distribution in the thin-disk laser was provided.The wavefront distributions of the thin disk pumped by the ideal beam and 4th order super-Gaussian beam were simulated.The relationships between the beam distortion and the laser medium thickness and uniformity of the pumped beam were analyzed.The results show that the thiner the thin-disk is,the more uniform the pumped beam is and the smaller the pump power density is,the smaller the beam distortion is.Compared with the thin-disk thickness and the pump power density,the influence of the intensity distribution of the pumped beam on the wavefront distributioin was greater.