Thermal lensing-induced bifocusing of spatial solitons in Kerr-type optical media
Laboratory of Research on Advanced Materials and Nonlinear Science (LaRAMaNS), Department of Physics, Faculty of Science, University of Buea - P.O. Box 63 Buea, Cameroon
Accepted: 9 April 2011
Thermo-optical effects cause a bifocusing of incoming beams in optical media, due to the birefringence created by a thermal lens that can resolve the incoming beams into two-component signals of different polarizations. We propose a nonperturbative theoretical description of the process of formation of double-pulse solitons in Kerr optical media with a thermally induced birefringence, based on solving simultaneously the heat equation and the propagation equation for a beam in a one-dimensional medium with uniform heat flux load. By means of a nonisospectral Inverse Scattering Transform assuming an initial solution with a pulse shape, a one-soliton solution to the wave equation is obtained that represents a double-pulse beam whose characteristic properties depend strongly on the profile of heat spatial distribution.
PACS: 42.65.Tg – Optical solitons; nonlinear guided waves / 42.70.Gi – Light-sensitive materials / 44.10.+i – Heat conduction
© EPLA, 2011