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Pulse splitting in the anomalous group-velocity-dispersion regime
Samuel E Schrauth1, Bonggu Shim, Aaron D Slepkov
1School of Applied and Engineering Physics, Cornell University, Ithaca, New York, 14853, USA. ss575@cornell.edu
Abstract:
We investigate experimentally the role that the initial temporal profile of ultrashort laser pulses has on the self-focusing dynamics in the anomalous group-velocity dispersion (GVD) regime. We observe that pulse-splitting occurs for super-Gaussian pulses, but not for Gaussian pulses. The splitting does not occur for either pulse shape when the GVD is near-zero. These observations agree with predictions based on the nonlinear Schrödinger equation, and can be understood intuitively using the method of nonlinear geometrical optics.
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