【摘要】 从二次谐波产生的理论出发 ,讨论了双轴晶体中二次谐波产生的相位匹配条件 ,推导了有效非线性光学系数的精确计算公式 ,以有机非线性光学晶体二苯甲酮为例 ,给出了对两种基波 (1 .0 6 4 μm和 0 . 80 8μm)二次谐波产生的相位匹配条件的数值模拟及相应的有效非线性光学系数的精确计算结果 ,并确定出相应的最佳相位匹配条件 .更多还原

【Abstract】 The phase matching for second harmonic generation(SHG) in biaxial nonlinear-optical crystals is discussed and the accurate calculation of the corresponding effective nonlinear coefficients is presented, based on which the optimum phase matching can be determined. As an example, numerical treatment of phase matching and the corresponding effective nonlinear coefficients for SHG at fundamental wavelengths of 1.064μm and 0.808μm in the organic nonlinear-optical crystal benzophenone is performed, and accordingly the optimum phase matchings are found.更多还原