title: Focusing of partially coherent light into planar waveguides.
abstract: Edge coupling of a focused partially coherent Gaussian Schell-model beam into a planar dielectric waveguide is examined. The incident field is decomposed into a sum of coherent modes that are expressed as a discrete superposition of plane-wave components. A model based on the rigorous diffraction theory of gratings is used to replace the waveguide with a corresponding periodic multilayer structure to determine the coupling efficiencies. Numerical simulations are presented for single and multimode planar waveguides and for a graded index waveguide. The results are compared with the predictions of the overlap integral method.
authors.forename: Toni
authors.initials: T
authors.lastname: Saastamoinen
authors.forename: Markku
authors.initials: M
authors.lastname: Kuittinen
authors.forename: Pasi
authors.initials: P
authors.lastname: Vahimaa
authors.forename: Jari
authors.initials: J
authors.lastname: Turunen
authors.forename: Jani
authors.initials: J
authors.lastname: Tervo