title: Self-imaging properties of polychromatic Gaussian beams: application to wavelength demultiplexing and space routing.
abstract: We propose an analytical model of the self-imaging of Gaussian beams and discuss the impact of the finite aperture and the beam truncation on the quality of the self-image reconstruction. Extension to polychromatic operation is then presented in the context of wavelength division multiplexing systems. From the first point we derive conditions for good self-imaging, compatible with the requirements of the telecommunication environment. A basic optical setup is then proposed to implement both wavelength demultiplexing and routing in a lensless configuration.
authors.affiliation: Department of Optics, Ecole Nationale Supérieure des Télécommunications de Bretagne, Brest, France. vincent.nourrit@enst-bretagne.fr
authors.forename: V
authors.initials: V
authors.lastname: Nourrit
authors.forename: J L
authors.initials: JL
authors.lastname: de Bougrenet de la Tocnaye