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

摘要

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