Fig. 3: Experimental beam evolution.
From: Nonlinear optical simulation of the post-Newton Schrödinger equation
a, b Typical experimental data of beam width as a function of power, displaying the power depending evolution, for aimed soliton width of 150 μm (a) and 600 μm (b). The beam first focuses to the width of the Newtonian soliton, and maintains in constant width for some power range. As the power increases higher orders of the refractive index changes affect the evolution, and an additional stable state is found around 4 W (a). For both beams we see a final defocusing effect but with different curvatures: positive (b) and negative (a). c Experimental raw data of beam images for 150 μm entrance showing the defocusing for power higher than 4 W.
