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Temporal optical solitons are expected to be important for dispersion-less communication1 and for all-optical switching and logic.2 Spatial solitons have been demonstrated recently in planar waveguides.3 They could also be used in all-optical processing. In some of these applications it would be advantageous to reduce the power requirements by using materials with large nonlinearities. It has been pointed out, however, that often the increase in the nonlinear refractive index is accompanied by an increase in two-photon absorption (TPA) and that significant TPA could set a limit on the usefulness of these materials for some applications.4 Here we investigate the specific effect of TPA on the propagation of optical solitons.
© 1990 Optical Society of America
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