We demonstrate experimentally that multiple four-wave mixing (FWM) pumped by a dual-frequency input in a single-mode fiber is modulationally unstable. This collective type of instability leads, in the anomalous dispersion regime, to sideband growth around all orders of FWM. This is in contrast with the normal dispersion regime where our measurements show that FWM exhibits no instability. Our conclusions are based on the first systematic mapping of the phenomenon as a function of the dual-pump input frequency separation.
© 2013 Optical Society of America
Original Manuscript: October 31, 2012
Manuscript Accepted: November 26, 2012
Published: January 10, 2013
J. Fatome, C. Finot, A. Armaroli, and S. Trillo, "Observation of modulationally unstable multi-wave mixing," Opt. Lett. 38, 181-183 (2013)