Shen H Y, Xu H, Zeng Z D, Lin W X, Wu R F, Xu G F
Appl Opt. 1992 Nov 1;31(31):6695-7. doi: 10.1364/AO.31.006695.
The principal refractive indices and the thermal coefficients for a LiNbO(3) crystal doped with 5 mol. % MgO have been measured by a minimum-deviation method for the wavelengths of 0.53975, 0.6328, 1.0795, and 1.3414, microm in the temperature range 20-154.5 degrees C. The constants of modified Sellmeier equations are all given in the described temperature range. The measured results were used to calculate the type I critical phase-matching angles for 1.0795- and 1.3414-microm second-harmonic generation at room temperature and the noncritical phase-matching temperature for 1.0795-microm second-harmonic generation for LiNbO(3) crystal doped with 5 mol. % MgO. The values obtained agree well with the experimental results.
采用最小偏向角法，在20 - 154.5摄氏度的温度范围内，对掺杂5摩尔%氧化镁的铌酸锂（LiNbO₃）晶体，测量了波长为0.53975、0.6328、1.0795和1.3414微米时的主折射率和热系数。在所述温度范围内给出了修正的Sellmeier方程的常数。利用测量结果计算了室温下掺杂5摩尔%氧化镁的LiNbO₃晶体在1.0795微米和1.3414微米产生二次谐波的I型临界相位匹配角，以及1.0795微米产生二次谐波的非临界相位匹配温度。所得值与实验结果吻合良好。
