Considering the effect of walk-off Angle, the accurate calculation of effective nonlinear optical coefficient of uniaxial crystal is presented, a example of calculation of BBO is given.
考虑到离散角的影响，给出了单轴晶体中有效非线性极化系数的精确计算公式，并给出了计算举例。
The process of the wavelength conversion is analyzed by numerical simulation and walk-off effect and pulse broadening have been observed in pulse propagations.
通过数值模拟，研究了波长转换过程，观察到脉冲传播过程中出现了走离效应与脉冲展宽。
Through theoretical analysis and numerical simulations, the walk-off effect between sum-frequency pulse and pump pulse caused by Group Velocity Mismatch (GVM) was discussed.
通过理论分析和数值模拟研究了在双脉冲泵浦情况下的级联和频与差频的二阶非线性效应，探讨了走离效应对波长转换的影响。
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