泵浦光对固体激光器光束质量的影响

利用有泵浦增益时的谐振腔衍射积分方程,研究了二极管泵浦固体激光器中泵浦光对振荡光场的影响,分析了泵浦光分布和泵浦光半径对振荡光场的影响。结果表明当泵浦光分布分别为均匀分布和高斯分布及椭圆高斯分布时,最佳的泵浦分布为高斯分布;对于高斯光束泵浦,泵浦半径的变化会引起振荡光场的尺寸和形态的变化。定量分析结果表明泵浦半径在一定范围内变化时,振荡光斑半径均随泵浦光半径的增大而减小。在实际的DPL设计中需要根据对振荡光的要求进行泵浦光的优化设计。

Effect of the Pumping Light on the of the Solid-State Lasers

The diffraction theory of resonators with the pumping gain is discussed in the present work; the results show that the pumping light can strongly affect the oscillating laser . In specifically, how the distribution of pumping light and the size of pumping light affect the oscillating laser has been analyzed. Compared with the different distribution such as Gauss pumping light、ellipse Gauss pumping light and the uniform pumping light, the best distribution of pumping light is the Gauss pumping light. For the Gauss pumping light, the change of the radius of the pump can cause that the size and the shape of oscillation light field are different. Quantitative analysis results show that the radius of oscillation light decreases when the radius of the pump increases in a certain range. In practice, to design better DPL,we should optimize the pumping light based on the need of the oscillating laser.