Spatial optical solitons governed by quadratic nonlinearity
Alexander V. BuryakOptical Sciences Centre, Australian National University, ACT 0200 Canberra, AustraliaYuri S. KivsharOptical Sciences Centre, Australian National University, ACT 0200 Canberra, Australia
1994en
ABI
Abstract
We demonstrate that a dielectric medium with purely quadratic nonlinearity [the so-called chi((2)) material] can display self-focusing phenomena through a new type of modulational instability of the interacting fundamental and second-harmonic field components and therefore can support propagation of (two-wave) optical solitons. We prove the existence of a family of such solitons, which are found numerically and, in some particular cases, also analytically. The two-wave solitons are stable in the whole parameter region in which they exist.
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Cited by 30 references