Title : On transformation of the spatial characteristics of diode lasers radiation
Abstract:
New effective method of forming homogeneous or given spatial distribution of the directivity diagram of diode lasers radiation based on application of multiple-beam-reflection (beam-splitting) phenomenon in anisotropic environments is developed.
It was ascertained that the uniformity degree of a formed light profile is proportional to quantity of beams generated by the system – in the case of 16-beam geometry the greatest degree of uniformity of spatial distribution and the maximal intensity of output radiation were achieved. The geometry of a two-dimensional light matrix formed when applying multiple-beam-reflection depends both on mutual orientation of prisms, and on beams direction. The authors have proposed the variant of prism system providing the formation of matrix light fields of various configurations. The fields can be operated effectively changing polarizing and other characteristics of the initial beam. The method proposed in comparison with analogues is characterized by simplicity in use and profitability; does not demand application of complicated intraresonator schema and adjusting processes connected with them; allows correcting effectively various irregularities of a wave surface, including those which are difficult to be removed by the other ways and caused by radiation multiple-mode. In the crystals researched the additional (transversal) shift of the reflected beams was observed. The similar shift was observed in another matters and caused the increase of efficiency of light beam transformation. It is shown, that both attenuation and intensification in the context of the method. It is of practical value.
