IMPROVED EXTERNAL RESONANT FREQUENCY MIXERS BASED ON DEGENERATE AND HALF-DEGENERATE RESONATORS

摘要

A resonator for generating frequency converted radiation from an input laserlight source or sources, the resonator comprising a quantity of non-linearoptical material which converts the input light to the frequency convertedradiation, and an optical cavity enclosing the non-linear optical material,the cavity including optical elements disposed such that the cavity isdegenerate for the transverse modes of either the frequency convertedradiation or the input light.