Temperature-insensitive phase-matching of second-harmonic generation(SHG)can be realized using two nonlinear crystals with opposite signs of the temperature derivation of phase mismatch.The design procedure for optimi...Temperature-insensitive phase-matching of second-harmonic generation(SHG)can be realized using two nonlinear crystals with opposite signs of the temperature derivation of phase mismatch.The design procedure for optimizing crystal lengths is presented,and full numerical simulations for the SHG process,based on realistic crystals,are performed at a typical high-power-laser wavelength of~1μm.It is suggested that the proposed two-crystal design can support high efficiency(60–70%)of SHG in the high-average power regime of a kilowatt.展开更多
基金Supported by the National Natural Science Foundation of China under Gratn Nos 61008017 and 60890202.
文摘Temperature-insensitive phase-matching of second-harmonic generation(SHG)can be realized using two nonlinear crystals with opposite signs of the temperature derivation of phase mismatch.The design procedure for optimizing crystal lengths is presented,and full numerical simulations for the SHG process,based on realistic crystals,are performed at a typical high-power-laser wavelength of~1μm.It is suggested that the proposed two-crystal design can support high efficiency(60–70%)of SHG in the high-average power regime of a kilowatt.
