Abstract

Numerical simulations of two-dimensional beam propagation in polydiacetylene para-toluene sulfonate measured values for n₂ > 0 and n₃ < 0, where Δn = n₂I + n₃I², predict stable self-trapping and a new phenomenon in which a spatial ring evolves from a Gaussian input beam. We interpret the numerical results theoretically, using the variational model of nonlinear Gaussian beam propagation.

© 1995 Optical Society of America

Two-dimensional bright spatial solitons stable over limited intensities and ring formation in polydiacetylene para-toluene sulfonate

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