SPATIALLY MODULATED LASER EMISSION

Abstract

Peculiar properties of lasing from film dye lasers in the case of spatially modulated excitation are studied. The modulation of the excitation intensity in the plane of the film is performed and the laser emission perpendicular to the film plane is considered. The lasing area diameter is chosen 1...2 orders larger than the layer thickness. As a result of spatially modulated pumping, spatially modulated laser emission is observed. The cross section of the divergent laser beam represents an interference pattern in the form of light and dark stripes whose period depends on the spatial period of excitation. Thus, the beam of the film laser carries information about the spatial distribution of the pump intensity and the obtained film laser operates as an active elementary dynamic hologram.