在测量非线性折射率和双光子吸收系数的频率分辨双光束耦合抽运探测技术中，光场的空间分布没有得到考虑。
The effects of spatial distribution on the experimental results are studied in spectrally resolved two-beam coupling pump-probe technique.
借助于m线技术测量了有效折射率，并利用逆wkb法计算了波导的折射率分布、扩散深度和扩散系数，发现其扩散性质差异。
Effective refractive indices were measured by m-line technique. The refractive indices distribution, diffusive depth and diffusivity coefficients have been calculated using inverse WKB method.
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