Study on the decision method of thermal spherical aberration coefficient of single end-pumped Nd:YVO4 Laser

Abstract

An analytical method which can be used as a guide to determine the thermal spherical aberration in the stable zone is presented. The position factor is numerically simulated with the change of pump power. The method of determining the stable limit by the particular values of the position factor is proposed and explained from the perspective of classical optics. The influence of the shape factor on the thermal spherical aberration coefficient is discussed. The wavefront information measurement experiment of asymmetric flat cavity of single end-pumped Nd:YVO4 is constructed. The thermal spherical aberration and the waist parameters at both ends of the thermal lens in the cavity are measured, and the symmetric cavity is used as the support experiment. The particular values of the position factor could be used as the basis for determining the stable limit. The experimental results of the thermal spherical aberration coefficient are consistent with the theoretical analysis.