Efficient beamshaper homogenizer design combining diffractive optical elements, microlens array and random phase plate

Abstract

We propose a new approach that combines original techniques to achieve a very efficient laser beam homogenizer and shaper. The three retained concepts are microlens array, random phase plate and diffractive optical elements. The performance of usual homogenizers are improved in terms of efficiency, homogenization and shaping abilities. We report on the theory and the development of such diffractive beamshaper homogenizers. Finally, an application concerning laser to fibre coupling is described.