Optical second-harmonic generation due to guided-wave structure consisting of quartz and glass film

This paper discusses optical second-harmonic generation (SHG) using phase-matching phenomena among the guided modes. The phase-matched film thickness, the phase-mismatching coefficient due to the variation of film thickness, and the gain reduction factor of the guiding structure are generally discussed here. The scattering loss originating from the boundary of the guide structure restricts the operation of SHG and is given by a simplified formulation.