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采用离子交换法制备了Ｒｂ：ＫＴＰ晶体光波导，在不同波长的耦合光下测量了ＴＥ和ＴＭ偏振波导模式的有效折射率，拟合了波导层折射率的余误差函数分布，证明了波导折射率增量的各向异性，给出了其色散关系；最后计算并讨论了Ｒｂ：ＫＴＰ波导的扩散特性。
The Rb: KTP crystal waveguide was prepared by ion exchange method. The effective refractive indices of TE and TM polarization waveguide were measured under different coupling wavelengths. The residual error function distribution of the waveguide refractive index was fitted. The rate of increase of the anisotropy, given its dispersion relationship; finally calculated and discussed the Rb: KTP waveguide diffusion characteristics.