Abstract

Heat load on material surfaces can induce an abrupt change in their optical responses, leading to novel transmission properties which can be quite advantageous from both experimental and technological standpoints. The process of beam reshaping induced by thermal lensing is considered for an optical medium with a self-focusing nonlinearity, the refractive index of which possesses an extra nonlocal component caused by thermo-optic effects. By solving simultaneously the heat equation and the nonlinear propagation equation for an anisotropic material, a rich variety of double-pulse beam patterns is found. It emerges that the polarization, intensities, widths and phases of individual pulses in the double-pulse structures can be tailored by adjusting the characteristic parameters of the thermal nonlocal potential.

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