We show that optical solitons in a broad spectral range can be excited by
propagating an off-axis Gaussian beam in nonlinear graded-index (GRIN)
waveguides. Owing to periodical variation of both the beam size and dispersion
coefficient in GRIN waveguides, the solitons belong to a newly discovered class
called guiding-center solitons. In planar GRIN waveguides, solitons may be
arranged to interact in both the temporal and spatial domains, thus the
waveguide may serve as a novel platform for soliton interactions.
© 1993 Optical Society of America
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