G. Van Simaeys et al., Experimental demonstration of the Fermi-Pasta-Ulam recurrence in a modulationally unstable optical wave - art. no. 033902, PHYS REV L, 8703(3), 2001, pp. 3902-NIL_50
Through a detailed spectral analysis of the propagation of square-shaped la
ser purses in optical fibers, we provide the experimental demonstration of
the Fermi-Pasta-Ulam recurrence phenomenon in modulationally unstable optic
al waves ruled by the nonlinear Schrodinger equation.