Compensation of nonlinear distortions of optical radiation

Parametric Solitons in Two-Dimensional Lattices of Purely Nonlinear Origin

“…Nearly a decade ago, mutual trapping and spatial locking of multifrequency components into simultons were demonstrated in uniform 2 media [23], confirming the predictions in Ref. [24]. The study of 2 solitons has largely progressed [25], including 1D QPM gratings [26].…”

Spatial Solitons and Induced Kerr Effects in Quasi-Phase-Matched Quadratic Media

“…However, as has been already established (see Ref. [1] to cite a few), solitary waves can also exist in media with quadratic nonlinearity as a result of cascading, under the condition of phase matching.…”

Route to Nonlocality and Observation of Accessible Solitons

“…[19,26] This makes an unexpected connection between self-trapped beams in two distinct physical systems encompassing rather diverse nonlinear optical responses: the ultrafast electronic nonlinearity of quadratic crystals and the slow molecular re-orientation of liquid crystals. The similarity is only limited to the profiles of the solitary waves, while their dynamic properties, such as stability, are quite different.…”

“…[25] After deriving the ruling equations and defining a suitable nonlocal parameter able to span the soliton-family from pure-Kerr or Townes-like (T-) to higly nonlocal or accessible (A-) solitons, we will outline the rather remarkable connection between our model and the equations describing quadratic two-color solitons (or simultons) in parametric media. [26] Let us consider the simple geometry sketched in figure 1: a planar glass cell containing an undoped NLC with a preset orientation of its molecular director. The aligned liquid crystal, anchored at the bounding interfaces, behaves as a positive uniaxial with n // =nẑ and n ⊥ =nx.…”