Controlled spatial beam splitter using four-wave-mixing images
Controlled spatial beam splitter using four-wave-mixing images
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DOI：
10.1103/physreva.80.055804
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发表时间：
2009-11
影响因子：
2.9
通讯作者：
Yanpeng Zhang;Cuicui Zuo;Huaibin Zheng;Changbiao Li;Zhiqiang Nie;Jianping Song;Hong Chang;M. Xiao-M.
中科院分区：
文献类型：
--
作者：
Yanpeng Zhang;Cuicui Zuo;Huaibin Zheng;Changbiao Li;Zhiqiang Nie;Jianping Song;Hong Chang;M. Xiao-M.
我们报告了由附加的缀饰激光束引起的四波混频（FWM）信号光束的空间位移和分裂的实验观测结果。这些效应是由二能级原子系统中原子相干性导致的交叉克尔非线性增强所引起的。分裂的FWM光束的空间分离和数量都可以通过缀饰光束的强度、克尔非线性以及原子密度来控制。理论结果与观测结果非常吻合。对这种可控光束分裂的研究在理解空间孤子的形成和相互作用以及空间信号处理的应用方面非常有用。
We report our experimental observations of spatial shift and splitting of four-wave mixing (FWM) signal beams induced by additional dressing laser beams. These effects are caused by the enhanced cross-Kerr nonlinearity due to atomic coherence in a two-level atomic system. The spatial separation and number of the split FWM beams can both be controlled by the intensity of the dressing beam, the Kerr nonlinearity, and atomic density. Theoretical results agree quite well with the observations. Studies of such controlled beam splitting can be very useful in understanding spatial soliton formation and interactions, and in applications for spatial signal processing.