Non-paraxial diffractive and refractive laser beam shaping

摘要

We discuss the implications of the modeling and the design of diffractive and refractive freeform surfaces in non-paraxial regions of the fields to shape the profile of a laser beam in its far field, its focus or any other region. The fast physical optics approach employed enables the inclusion of freeform surfaces and diffractive beam shaping elements in the modeling. The design of beam shaping elements follows an inverse physical optics approach. We will discuss the pros and cons of refractive and diffractive solutions together with examples.