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arXiv · 1711.11478

Spatiotemporal light-beam compression from nonlinear mode coupling

Katarzyna Krupa·Alessandro Tonello·Vincent Couderc·Alain Barthélémy·Guy Millot·Daniele Modotto·Stefan Wabnitz
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Abstract

We experimentally demonstrate simultaneous spatial and temporal compression in the propagation of light pulses in multimode nonlinear optical fibers. We reveal that the spatial beam self-cleaning recently discovered in graded-index multimode fibers is accompanied by significant temporal reshaping and up to four-fold shortening of the injected sub-nanosecond laser pulses. Since the nonlinear coupling among the modes strongly depends on the instantaneous power, we explore the entire range of the nonlinear dynamics with a single optical pulse, where the optical power is continuously varied across the pulse profile.

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Katarzyna Krupa, Alessandro Tonello, Vincent Couderc, Alain Barthélémy, Guy Millot, Daniele Modotto, Stefan Wabnitz. 2017-11-30. Spatiotemporal light-beam compression from nonlinear mode coupling. https://doi.org/10.1103/physreva.97.043836

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