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Bostock, C; Christian, JM; McDonald, GS
Languages: English
Types: Unknown
Subjects: media_dig_tech_and_creative_econ, other, energy
Two-colour spatial solitons comprise coupled nonlinear optical beams at two distinct temporal frequencies [1]. The components (which may be bright-like and/or dark-like) are localized in space and tend to overlap, thereby allowing\ud the interplay between diffraction and nonlinear effects to result in stationary light structures. We will propose a more complete and realistic model for describing such phenomena. A key feature of our approach is that one may access multicolour geometries involving beam propagation at arbitrary angles and orientations with respect to the reference direction – such considerations are central to multiplexing and interface scenarios, but lie far outside the reach of conventional theory. The modulational instability problem can be solved in a range of physically relevant regimes, and extensive computations have\ud confirmed theoretical predictions. New families of exact analytical two-colour solitons are reported, each of which has co-propagation and counter-propagation classes that are related by geometrical transformation.
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    • [1] R. De La Fuente and A. Barthelemy, Opt. Commun. 88, 419-423(1992). [2] M. Shalaby and A. J. Barthelemy, IEEE J. Quantum Electron. 28, 2736-2741(1992).
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