测量慢弛豫介质的非线性折射率Z扫描方法

MEASUREMENT OF NONLINEAR REFRACTIVE INDEX WITH Z-SCAN METHOD FOR SLOW DECAY MATERIALS

对非线性折射率慢弛豫介质的Z扫描理论进行了详细推导,得到了透射光场的表达式.分析表明:对于慢弛豫介质,其Z扫描过程也是非线性折射的累积过程.实验结果与理论分析一致.

The measurement of nonlinear refractive index with Z-scan method for slow decay materials are discussed in detail. We derive the resultant electric field pattern at the aperture. It is pointed out that the accumulating effect contribute largely to the Z-scan signal in the slow decay nonlinear optical materials. The theoretical analysis is consistent with experimental result.