Nonlinear Optical Properties of KNbO3 Single Crystal in the Orthorhombic Phase
Nonlinear Optical Properties of KNbO3 Single Crystal in the Orthorhombic Phase
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DOI：
10.1143/jjap.13.1362
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发表时间：
1974-09
影响因子：
1.5
通讯作者：
Y. Uematsu
中科院分区：
文献类型：
--
作者：
Y. Uematsu
利用YAG/Nd激光器对KNbO_3晶体正交相的非线性光学特性进行了详细的研究。测量了一些激光波长的折射率。利用Maker条纹技术测量了该晶体在室温下的非线性光学系数。结果如下：相对于石英的d11，d31=35，d32=-40和d33=-61。这些值与Ba 2NaNb 5 O 15的值相当。测量了dij系数的温度依赖性。确定了临界和非临界相位匹配条件。在室温下，临界相位匹配的d31和d32系数是可能的。所观察到的相位匹配角被认为是在良好的协议与从折射率数据计算的值。
Nonlinear optical properties of KNbO3 single crystals were investigated in detail in the orthorhombic phase by using YAG/Nd laser. The refractive indices for some laser wavelengths were measured. The nonlinear optical coefficients of this crystal at room temperature were obtained by means of the Maker fringes technique. Results were as follows: d31=35, d32=-40 and d33=-61 relative to d11 of quartz. These values are comparable with those of Ba2NaNb5O15. The temperature dependences of dij coefficients were measured. Critical and noncritical phase-matching conditions were determined. At room temperature, critical phase-matching was possible for d31 and d32 coefficients. The observed phasematching angles were found to be in good agreement with the values calculated from the refractive index data.