低对称性非线性光学晶体BIBO的倍频性质

Frequency doubling property of the low symmetric nonlinear optical crystal BIBO

测量了BIBO晶体的主轴折射率 .对BIBO晶体在整个空间内的倍频性质进行了系统讨论 .当基频光为Nd :YAG激光时 (λ =10 6 4nm) ,发现最大的有效非线性光学系数位于 ( 16 8.9°,90°)的Ⅰ类相位匹配方向上 .测量了BIBO晶体的容限角、容限温度、光损伤阈值 ,以及 10 6 4nm的腔外、腔内倍频性质 .实验中 ,最大腔外倍频转换效率达到 6 8% ,腔内倍频输出达到 1.0 6W .

For BiB3O6 ( BIBO) crystals the refractive index on the main optical axis was measured. A systematic research was performed on the frequency-doubling property of the BIBO crystal. When the fundamental light was supplied by a Nd:YAG laser (lambda = 1064nm), the largest effective nonlinear optical coefficient was found in the Type- I phase-matching direction ( 168.9degrees, 90degrees). We measured the angular acceptance, temperature acceptance, laser damage threshold, and the ultra-cavity as well as the intro-cavity frequency-doubling characteristics of the BIBO crystal. In our experiments, the largest ultra-cavity frequency-doubling conversion efficiency was 68%, and the intro-cavity frequency doubling output power reached 1.06W.