Abstract
We report an experiment about the transformation of radical and azimuthal information of high-order Laguerre-Gaussian beam from the probe beam to dressing four-wave mixing beam. During this process, dressing Kerr nonlinear dispersion causes a spatial splitting on output Laguerre-Gaussian beam. We found that the number of split spots can be controlled by frequency detuning and power of the dressing field. The potential application of such modulated spatial splitting phenomenon on optical switching of the multi-channel router in atomic ensembles is discussed.
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