周期性极化MgO：LiNbO_3高效产生高压缩光和二次谐波
Efficient generation of highly squeezed light and second harmonic wave with periodically poled MgO:LiNbO_3
摘要：
我们报道了利用周期极化的MgO：LiNbO $_{\mathrm{3}}$（PPMgLN）晶体有效地产生连续波压缩光和二次谐波，这使我们能够利用大的非线性光学系数$d_{\mathrm{33}}$。利用PPMgLN晶体制作的亚阈值光参量振荡器在860 nm处获得了$-7.60 \pm 0.15$ dB的压缩能级。我们还产生了400 mW的二次谐波在430 nm从570 mW的基波与70%的转换效率，通过使用PPMgLN晶体内的外腔。
英文摘要：
We report on effective generation of continuous-wave squeezed light and second harmonics with a periodically poled MgO:LiNbO$_{\mathrm{3}}$ (PPMgLN) crystal which enables us to utilize the large nonlinear optical coefficient $d_{\mathrm{33}}$. We achieved the squeezing level of $-7.60 \pm 0.15$dB at 860 nm by utilizing a subthreshol optical parametric oscillator with a PPMgLN crystal. We also generated 400 mW of second harmonics at 430 nm from 570 mW of fundamental waves with 70% of conversion efficiency by using a PPMgLN crystal inside an external cavity.
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