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Nonlinear Optics and Applications III
Theoretical analysis on second harmonic (SH) generation with phase matched grating in waveguide is presented from the viewpoint of device design. Usually high intensity sources are necessary in order to observe a SH in a χ (2) nonlinear structure. For this purpose, the novel proposed design takes into account a double grating effect which enhances the guided SH signal along the waveguide. In the presented structure two grating are considered: the first grating, considered at the interfacedoi:10.1117/12.820443 fatcat:ytzfxsqvgfhr3c2ro3bdkzsgfe