Optics and Photonics Society of Iran

When diffraction effect is not important, geometrical optics can be used to design laser beam shaper. In this shaper a system including two aspheric lenses  is adopted to change gaussian intensity distribution into a uniform one. The basic principles of design is the same input and output  power and conservation of optical path length. In this paper, an elliptical divergent laser beam generated from a 980 nm gain guided laser diode with 40&mum of astigmatism and divergence of 4 is used to create a circular beam of divergence angle 0.26 mrad. In this design a uniform output intensity beam of 2 mm in spot size is obtained. This configuration, as compared with the published methods, enables the reduction of optical elements resulting in a miniaturized optical system