title: Lateral patterning of nonlinear frequency conversion with transversely varying quasi-phase-matching gratings.
abstract: We demonstrate control of the nonlinear conversion across a beam profile by using periodically poled lithium niobate with a laterally nonuniform quasi-phase-matching grating. As a representative experiment, generation of a flat-top second-harmonic beam is demonstrated.
authors: G
authors: G
authors: Imeshev
authors: M
authors: M
authors: Proctor
authors: M M
authors: MM
authors: Fejer