Johnston, Benjamin FDekker, PeterSaltiel, SolomonWithford, MichaelKivshar, Yuri2015-12-081605-7422http://hdl.handle.net/1885/36619By identifying appropriate quasi-phase-matching (QPM) conditions in z-cut congruent lithium niobata, we demonstrate simultaneous QPM of type-I (ooe) and higher order type-0 (eee) second-harmonic-generation, which share a common second harmonic wave. We demonstrate this experimentally at 1064nm, and show that cascading between these processes occurs. The cascading can result in energy exchange between the cross-polarized fundamentals, indicative of an equivalent 3rd order process. The nonlinear phase shifts and transfer functions resulting from this cascading are explored numerically.Keywords: Energy exchange; Quasi phase matched processes; Harmonic generation; Lithium compounds; Phase matching; Polarization; Wave propagation Lithium niobate; Nonlinear optics200810.1117/12.7597532015-12-08