beam inside nematic liquid crystals [32]. Two Gaussian beams with 10-/um waist and
28-~tm separation were launched to form two spatial solitons. In spite of their relatively
large separation, the refractive-index perturbation created by one beam can diffuse and
affect the other beam, causing the two solitons to attract each other. In part (d) of
Figure 14.5 such an attraction leads to complete interlacing when the Gaussian beams
are launched in parallel and are separated by 1/.tm at the input interface. Notice that
the distance at which two solitons collide decreases as the input power is ...
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