title: Beam shaping in spatially modulated broad-area semiconductor amplifiers.
abstract: We propose and analyze a beam-shaping mechanism that in broad-area semiconductor amplifiers occurs due to spatial pump modulation on a micrometer scale. The study, performed under realistic parameters and conditions, predicts a spatial (angular) filtering of the radiation, which leads to a substantial improvement of the spatial quality of the beam during amplification. Quantitative analysis of spatial filtering performance is presented based on numerical integration of the paraxial propagation model and on analytical estimations.
authors.affiliation: Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Colom 11, Terrassa 08222, Spain. ramon.herrero@upc.edu
authors.forename: R
authors.initials: R
authors.lastname: Herrero
authors.forename: M
authors.initials: M
authors.lastname: Botey
authors.forename: M
authors.initials: M
authors.lastname: Radziunas
authors.forename: K
authors.initials: K
authors.lastname: Staliunas