Rigorous intensity and phase-shift manipulation in optical frequency conversion.
Rigorous intensity and phase-shift manipulation in optical frequency conversion.
复制标题
光学频率转换中严格的强度和相移控制
DOI：
10.1038/srep27457
复制
发表时间：
2016-06-07
影响因子：
4.6
通讯作者：
Zhu YY
中科院分区：
文献类型：
--
作者：
Yang B;Yue YY;Lu RE;Hong XH;Zhang C;Qin YQ;Zhu YY
用一种简单的方法研究了抽运耗尽型光学超晶格的非线性频率转换。直接从非线性耦合方程组得到了四个严格的相位匹配条件，得到的OSL畴结构一般是非周期的，而不是周期的。利用这种方法，不仅可以任意控制谐波的强度，而且可以任意控制谐波的相移。进一步研究了高斯光束的二次谐波产生。该工作对设计高转换效率的非线性光学器件的实际应用具有指导意义。
A simple method is employed to investigate the nonlinear frequency conversion in optical superlattices (OSL) with pump depletion. Four rigorous phase-matching conditions for different purposes are obtained directly from the nonlinear coupled equations and the resulting OSL domain structures are generally aperiodic rather than periodic. With this method, not only the intensity but also the phase-shift of the harmonic waves can be manipulated at will. The second-harmonic generation of Gaussian beam is further investigated. This work may provide a guidance for the practical applications of designing nonlinear optical devices with high conversion efficiency.