Article

Optical and Quantum Electronics

, Volume 35, Issue 14, pp 1221-1244

First online:

All-optical integrated logic gates based on intensity-dependent transverse modal coupling

  • Eduardo F. MateoAffiliated withÁrea de Óptica, Dpto. de Física Aplicada, Facultade de Física e E.U. de Óptica, Universidade de Santiago de Compostela, E-
  • , Jesús liñaresAffiliated withÁrea de Óptica, Dpto. de Física Aplicada, Facultade de Física e E.U. de Óptica, Universidade de Santiago de Compostela, E-

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Abstract

We present a study of the spatial propagation of light in a third order planar step-index waveguide with a transverse parabolic width film. By using the Lagrangian formalism, the width and phase evolution of a Gaussian beam has been completely described showing both the refractive contributions of the lens-like waveguiding geometry and self-focusing nonlinearity. As a result of this study, we have proposed the design of a new kind of integrated all-optical devices which, by means of the spatial beam power modulation and its influence on the transverse modal coupling can operate as phase-insensitive AND, OR and XOR logic gates.

all-optical logic devices nonlinear integrated optics variational propagation