Modulational instability of spatially broadband nonlinear optical pulses in four-state atomic systems
arXiv:nlin/0611029 · doi:10.1103/PhysRevE.74.067603
Abstract
The modulational instability of broadband optical pulses in a four-state atomic system is investigated. In particular, starting from a recently derived generalized nonlinear Schrödinger equation, a wave-kinetic equation is derived. A comparison between coherent and random phase wave states is made. It is found that the spatial spectral broadening can contribute to the nonlinear stability of ultra-short optical pulses. In practical terms, this could be achieved by using random phase plate techniques.
arXiv comment9 pages, 3 figures, to appear in Phys. Rev. E
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