Linale, N.Bonetti, Juan I.Sánchez, Alfredo D.Hernández, Santiago M.Fierens, Pablo IgnacioGrosz, Diego2020-07-012020-07-012020-050146-9592http://ri.itba.edu.ar/handle/123456789/2235"In this Letter, we present, for the first time, to the best of our knowledge, the modulation instability (MI) gain spectrum of waveguides with an arbitrary frequency-dependent nonlinear coefficient ensuring strict energy and photon-number conservation of the parametric process. This is achieved by starting from a linear stability analysis of the recently introduced photon-conserving nonlinear Schrödinger equation. The derived MI gain is shown to predict some unique features, such as a nonzero gain extending beyond a zero-nonlinearity wavelength and a complex structure of the MI gain spectrum. Analytical results are shown to be in excellent agreement with numerical simulations."eninfo:eu-repo/semantics/embargoedAccessMODULACIONGUIAS DE ONDASArtículos de Publicaciones Periódicas