Y向切割掺杂铌酸锂晶体中的光耦合

实验研究了y向切割掺杂铌酸锂晶体中入射光和反射光之间的光耦合.当异常光分别沿+y和-y轴方向入射时，二者的透射率和反射率的时间行为基本一致.而寻常光分别沿+y和-y轴方向入射时，二者的透射率和反射率的时间行为明显不同.初步探讨了该现象的物理机理. 关键词： 反射光栅 光耦合 光生伏打效应 扩散机理

Light coupling in Y-cut doped lithium niobate crystals

We experimentally study the light coupling behaviors between the transmitting light and reflected light in y cut lithium niobate crystals. When the e polarized incident light is launched into the crystals along y axis and - y axis, respectively, we find that the time behaviors of the reflectivity and transmissivity are almost identical for both cases, respectively. Whereas when the o polarized incident light is launched into the crystals along y axis and - y axis, respectively, the time behaviors of the reflectivity and transmissivity for both cases are obviously different. We investigate the physics mechanism of these phenomena preliminarily.