Weak-wave advancement in nearly collinear four-wave mixing
arXiv:nlin/0309040 · doi:10.1364/OE.10.000581
Abstract
We identify a new four-wave mixing process in which two nearly collinear pump beams produce phase-dependent gain into a weak bisector signal beam in a self-defocusing Kerr medium. Phase matching is achieved by weak-wave advancement caused by cross-phase modulation between the pump and signal beams. We relate this process to the inverse of spatial modulational instability and suggest a time-domain analog.
7 pages, 3 figures