Beam propagation study of nonlinear coupling between transverse electric modes of a slab waveguide

Finlayson, N.; Wright, E. M.; Seaton, C. T.; Stegeman, G. I.; Silberberg, Y.
June 1987
Applied Physics Letters;6/1/1987, Vol. 50 Issue 22, p1562
Academic Journal
The evolution of an optical field along a symmetrical slab waveguide capable of supporting two TE modes in the linear regime is investigated using the beam propagation method (BPM) where the waveguide and cladding media have a uniform, self-focusing Kerr law nonlinearity. BPM calculations agree well with coupled-mode theory at low input powers, but diverge at powers approaching the coupled-mode value of the critical power and above, due to self-focusing of the field. At high power, the beam splits into two parts which generate unusual long-range collision effects.


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