a semiconductor laser module comprises a tapered laser diode and / or a tapered amplifier diode equipped with beam shaping optics . the tapered laser diode and / or the tapered amplifier diode includes an emission facet for emitting a laser beam along a beam axis . the beam - shaping optics comprise a plano - convex cylindrical lens oriented so as to change divergence of the beam in the fast axis direction , the plano - convex spherical cylindrical lens having a planar surface arranged facing the facet and a circular cylindrical surface facing away from the facet .