Refractive indices of lithium niobate as a function of wavelength and composition
Refractive indices of lithium niobate as a function of wavelength and composition
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DOI：
10.1063/1.352951
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发表时间：
1993-04
影响因子：
3.2
通讯作者：
U. Schlarb;K. Betzler
中科院分区：
文献类型：
--
作者：
U. Schlarb;K. Betzler
应用干涉法测定宽波长和成分范围内铌酸锂单晶的折射率。提出了广义的二项 Sellmeier 方程，将折射率描述为波长和化学计量的函数。基于这个广义Sellmeier方程，几乎所有LiNbO3光学表征方法的参数都可以计算。通过 Kramers-Kronig 分析，紫外吸收边的偏移和非常光折射率随成分的变化可以相互参考。发现与各自的实验值非常吻合。
An interferometric method is applied to determine the refractive indices of lithium niobate single crystals over a wide wavelength and composition range. A generalized two term Sellmeier equation is proposed that describes the refractive indices as a function of wavelength and stoichiometry. On the basis of this generalized Sellmeier equation the parameters of nearly all optical characterization methods for LiNbO3 can be calculated. By means of a Kramers–Kronig analysis the shift in the UV absorption edge and the change in the extraordinary refractive index with the composition can be referred to each other. Excellent agreement is found with the respective experimental values.