A NUMERICAL PROCEDURE FOR SOLITON GENERATION

We present a simple method for obtaining stationary solutions to the p erturbed nonlinear Schrodinger equation from a random input field. In particular, we propagate the initial field while both renormalizing to ensure that the maximum field value remains constant and absorbing th e field at increasingly large distances from the centre of the computa tional window in position and wavevector space. Our algorithm, which r esults in near-perfect lowest-order solitons for a wide range of absor ber and computational parameters, should be equally applicable to othe r nonlinear equations.