A method for direct measurement of the Verdet constant of a biaxial crystal cut along one of the optical axes was proposed and tested on a TbF₃ crystal. The dispersion of the refractive indices of the TbF₃ crystal was measured and analyzed in two ways—using a refractometer and the method of waveguide mode excitation. The dispersion of the position of the optical axis was calculated based on the experimental results, as well as using the refractive index data published earlier.

中文翻译：

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双轴 TbF3 晶体中光学和磁光特性的色散

提出了一种直接测量沿光轴之一切割的双轴晶体的 Verdet 常数的方法，并在 TbF ₃晶体上进行了测试。TbF ₃晶体的折射率色散通过两种方式进行测量和分析——使用折射计和波导模式激发的方法。光轴位置的色散是根据实验结果以及使用早先公布的折射率数据计算出来的。