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physics.optics2021★ 6 cited
Supermode-based second harmonic generation in a nonlinear interferometer
David Barral, Virginia D'Auria, Florent Doutre +7
We demonstrate supermode-based second harmonic generation in an integrated nonlinear interferometer made of linear and nonlinear directional couplers. We use a fully-fibered pump s…
physics.optics2019★ 4 cited
Symmetry-based analytical solutions to the χ^{(2)} nonlinear directional coupler
David Barral, Kamel Bencheikh, Peter J. Olver +2
In general the ubiquitous χ^{(2)} nonlinear directional coupler, where nonlinearity and evanescent coupling are intertwined, is nonintegrable. We rigorously demonstrate that matchi…