The effect of thermally induced aberration on laser beam quality is analyzed based on mode coupling theory. The relation between coupling amplitude of ideal and aberrated fundamental mode and Zernike aberration is numerically simulated.

• 首先根据模态耦合理论分析了热畸变对光束质量的影响,并用数值方法得到理想基模和畸变基模耦合振幅与泽尼克(Zernike)畸变之间的关系。