title: Discrete self-focusing in nonlinear arrays of coupled waveguides.
abstract: We show that a nonlinear array of coupled waveguides can exhibit discrete self-focusing that in the continuum approximation obeys the so-called nonlinear Schrödinger equation. This process has much in common with the biophysical model of Davydov.
authors.forename: D N
authors.initials: DN
authors.lastname: Christodoulides
authors.forename: R I
authors.initials: RI
authors.lastname: Joseph