Abstract
The results of a theoretical and experimental investigation of parametric conversion of coherent and incoherent conical beams are presented. Special attention is paid to the problems of cumulative action of the incoherent conical pump and formation of output patterns in optical parametric oscillators and optical parametric generators. The theoretical model is based on transverse and longitudinal phase matching of three and four conical beams. The experimental results for optical parametric oscillators and optical parametric generators are based on KTP crystal pumped by coherent and incoherent conical beams at 532 nm as well as on a sodium-vapor optical parametric generator that is pumped simultaneously by Bessel and Gaussian beams.
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