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Phys Rev Lett. 2006 Aug 18;97(7):073903. Epub 2006 Aug 16.

Controllable self-steepening of ultrashort pulses in quadratic nonlinear media.

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  • 1Department of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.


By analyzing ultrashort optical pulse propagation in quadratic nonlinear media beyond the slowly varying envelope approximation, we find that the sign and magnitude of self-steepening can be controlled through the wave vector mismatch. As an example of this phenomenon's impact on ultrashort pulse propagation, we show that it may be used to cancel the propagation effects of group-velocity mismatch. We obtain quantitative agreement between theory, simulations, and experiments.

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