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.

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通过将物质方程与耦合波方程联立数值求解， 可得到光折变光栅形成过程中两波耦合增益系数以及光束条纹相位的变化。

Material equations and coupled wave equations are jointly solved to get the coupling coefficient and phase shift of light pattern during the dynamic procedure of photorefractive grating formation.

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光源的光束半径及入射倾斜角影响光源的耦合系数及各模式的功率占有率，进而影响传感器的灵敏度。

The percentage power of mode and the excited coefficient of the light source were affected by beam's radius and slope Angle. Furthermore the sensitivity of sensor was affected.

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