Yao Bo, Tian Hao, Hu Chengpeng, Zhou Zhongxiang, Liu Dajun
Appl Opt. 2013 Dec 1;52(34):8229-32. doi: 10.1364/AO.52.008229.
The refractive indices and quadratic electro-optic effect in terms of the coefficients (R11-R12) in a paraelectric K0.95Na0.05Ta0.58Nb0.42O3 single crystal were measured. The dispersion of the refractive index was described exactly by a single-term Sellmeier equation. We found an obvious dispersion of the electro-optic coefficients (R11-R12), and the coefficients decreased quickly with increasing wavelength above the Curie temperature. Following [J. Appl. Phys.40, 720 (1969)], we obtained a dispersion equation for the electro-optic effect in a paraelectric potassium sodium tantalate niobate single crystal. The experimental results agreed well with the dispersion model.
测量了顺电态K0.95Na0.05Ta0.58Nb0.42O3单晶中与系数（R11 - R12）相关的折射率和二次电光效应。用单项Sellmeier方程精确描述了折射率的色散。我们发现电光系数（R11 - R12）存在明显的色散，并且在居里温度以上，随着波长增加，这些系数迅速减小。遵循[《应用物理杂志》40, 720 (1969)]，我们得到了顺电态铌酸钠钾钽单晶中电光效应的色散方程。实验结果与色散模型吻合良好。
