Cascaded generation of multiply charged optical vortices and spatiotemporal helical beams in a Raman medium

Details Cascaded generation of multiply charged optical vortices and spatiotemporal helical beams in a Raman medium Cascaded generation of multiply charged optical vortices and spatiotemporal helical beams in a Raman medium

2007-01-26

arxiv.org/abs/physics/0701304v2

Physics

Optics

5 pages, 4 figures, some revisions of introductory part, corrected references

Scientific paper

10.1103/PhysRevLett.98.243601

Using an example of a Raman active medium we describe how a common nonlinear process of four-wave mixing can be used to induce strong coupling between the spatial and temporal degrees of freedom in optical waves. This coupling produces several unexpected effects. Amongst those are cascaded excitation of multiply charged optical vortices, spatial focusing in a nonlinearly defocusing medium and generation of helically shaped spatio-temporal optical solitons.

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