Li Changbiao, Zhang Yanpeng, Zheng Huaibin, Wang Zhiguo, Chen Haixia, Sang Suling, Zhang Ruyi, Wu Zhenkun, Li Liang, Li Peiying
Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi’an Jiaotong University, Xi’an, China.
Opt Express. 2011 Jul 4;19(14):13675-85. doi: 10.1364/OE.19.013675.
We report our observations on enhancement and suppression of spatial four-wave mixing (FWM) images and the interplay of four coexisting FWM processes in a two-level atomic system associating with three-level atomic system as comparison. The phenomenon of spatial splitting of the FWM signal has been observed in both x and y directions. Such FWM spatial splitting is induced by the enhanced cross-Kerr nonlinearity due to atomic coherence. The intensity of the spatial FWM signal can be controlled by an additional dressing field. Studies on such controllable beam splitting can be very useful in understanding spatial soliton formation and interactions, and in applications of spatial signal processing.
我们报告了关于在与三能级原子系统相关联的二能级原子系统中空间四波混频（FWM）图像的增强和抑制以及四个共存FWM过程相互作用的观察结果，并将其作为比较。在x和y方向上均观察到了FWM信号的空间分裂现象。这种FWM空间分裂是由原子相干导致的增强交叉克尔非线性引起的。空间FWM信号的强度可以通过附加的修饰场来控制。对这种可控光束分裂的研究对于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可能非常有用。
