Energy exchange in fast optical soliton collisions as a random cascade model

Details Energy exchange in fast optical soliton collisions as a random cascade model Energy exchange in fast optical soliton collisions as a random cascade model

2007-06-28

arxiv.org/abs/0706.4333v2

Nonlinear Sciences

Pattern Formation and Solitons

Revised version, 12 pages, 2 figures. Accepted to Phys. Lett. A

Scientific paper

We study the dynamics of a probe soliton propagating in an optical fiber and exchanging energy in fast collisions with a random sequence of pump solitons. The energy exchange is induced by Raman scattering or by cubic nonlinear loss/gain. We show that the equation describing the dynamics of the probe soliton's amplitude has the same form as the equation for the local space average of energy dissipation in random cascade models in turbulence. We characterize the statistics of the probe soliton's amplitude by the \tau_{q} exponents from multifractal theory and by the Cram\'er function S(x). We find that the n-th moment of the two-time correlation function and the bit-error-rate contribution from amplitude decay exhibit power-law behavior as functions of propagation distance, where the exponents can be expressed in terms of \tau_{q} or S(x).

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