Backward optical parametric efficiency in quasi-phase-matched GaN waveguide presenting stitching faults

C. Montes (1) , Pierre Aschieri (2) , Marc de Micheli (2)

1 LPMC - Laboratoire de physique de la matière condensée
2 LPMC - Laboratoire de physique de la matière condensée

We model a backward mirrorless optical parametric oscillator in a fragmented GaN waveguide consisting in a sequence of submicronic periodically poled elements separated by uniformly polarized connection sections representing stitching errors. We find that the generated coherent phase of the backscattered wave locks the phases of the forward propagating waves in such a way that the dynamics is nonintuitivelly as much efficient as for a uniform quasi phase matched waveguide. The best coherence transfer to the backward wave, obtained for perfect group velocity matching of the forward propagating waves, requires a nanoscale poled periodicity which is achieved in GaN through epitaxy.

Mots clés: nonlinear optics; bacward interaction

Domaines: Optique [physics.optics]

C. Montes, Pierre Aschieri, Marc de Micheli. Backward optical parametric efficiency in quasi-phase-matched GaN waveguide presenting stitching faults. Optics Letters, 2013, 38 (12), pp.2083-2085. ⟨hal-00832218⟩