Theoretical analysis of Cherenkov third harmonic generation via two cascaded χ(2) processes in a waveguide
نویسنده
چکیده
We report a comprehensive numerical study of a type of quasi-phase-matched Cherenkov third harmonic generation in a nonlinear waveguide, and this Cherenkov third harmonic generation consists of a guided-to-guided second harmonic generation cascaded with a guided-to-radiated sum-frequency generation. Following the coupled-mode theory, the temperature-detuning characteristics of third harmonic (TH) radiation under different pumping-power densities were studied. TH power dependences on interaction length have been discussed as well, which includes three situations: without reciprocal vector participating, and forward and backward reciprocal vector participating. In addition, we demonstrate that the Cherenkov angle of each TH radiation is not sensitive to the temperature variation.
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