title: Sum-frequency generation in dissipative systems: experimental evidence for optical wave patterns.
abstract: We report a new mechanism for the secondary instabilities of traveling wave patterns in dissipative systems. In close analogy to nonlinear optics and plasma physics, it is a process of three-wave interaction that leads to sum-frequency generation. The primary traveling wave gives rise to two additional wave components, an upper and a lower frequency. We outline the mechanism and we show that this process does occur for wave patterns obtained in an optical experiment.
authors.affiliation: Institut Non Linéaire de Nice, UMR 6618 CNRS-UNSA, 1361 Route des lucioles, 06560 Valbonne-Sophia Antipolis, Nice, France.
authors.forename: S
authors.initials: S
authors.lastname: Residori
authors.forename: A
authors.initials: A
authors.lastname: Petrossian
authors.forename: L
authors.initials: L
authors.lastname: Gil