Modulational instability of spatially broadband nonlinear optical pulses in four-state atomic systems

Details Modulational instability of spatially broadband nonlinear optical pulses in four-state atomic systems Modulational instability of spatially broadband nonlinear optical pulses in four-state atomic systems

2006-11-14

arxiv.org/abs/nlin/0611029v1

Phys. Rev. E 74, 067603 (2006)

Nonlinear Sciences

Pattern Formation and Solitons

9 pages, 3 figures, to appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.74.067603

The modulational instability of broadband optical pulses in a four-state atomic system is investigated. In particular, starting from a recently derived generalized nonlinear Schr\"odinger 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.

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