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晶体倍频中当晶体表面法线与相位匹配方向不一致时 ,需调整入射光方向使相位失配最小。讨论了光波折射对相位匹配的影响 ,提出了精确确定入射光方向的方法 ,此方法既可用于单轴晶体 ,也可用于双轴晶体。
Crystal frequency multiplier when the crystal surface normal and phase matching direction is inconsistent, the need to adjust the incident light direction to minimize phase mismatch. The influence of light refraction on the phase matching is discussed. A method to accurately determine the incident light direction is proposed. This method can be used for both uniaxial and biaxial crystals.