Abstract

We show theoretically and numerically that in an instantaneous-response Kerr medium, a coherent signal light can be generated spontaneously from an incoherent pump light in the degenerate four-wave mixing process. Our analysis shows that this phenomenon requires the same group velocities of pump wave and idler wave as well as the convection (walk-off) between the signal wave and pump/idler waves.

© 2009 Optical Society of America

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