Forward four-wave mixing with defocusing nonlinearity.
We experimentally demonstrate degenerate, forward four-wave mixing effects in a self-defocusing photorefractive medium, in both one and two transverse dimensions. We observe the nonlinear evolution of new modes as a function of propagation distance, in both the near-field and far-field (Fourier space) regions.
Jia
Shu
S
Department of Electrical Engineering, Princeton University, NJ 08544, USA.
Wan
Wenjie
W
Fleischer
Jason W
JW