Wideband CO2 Laser Second Harmonic Generation Phase Matched in GaAs Thin-Film Waveguides

Abstract

Phase-matched CO2 laser second harmonic generation has been observed in GaAs thin-film waveguides. Phase matching is accomplished through the use of dielectric waveguide dispersion. Large values of the phase-matched bandwidth are observed and attributed partly to the nature of waveguide phase matching and partly to tapering of the waveguide thickness.