Abstract

Conical diffraction was observed when two beams of the same or different frequencies intersect as they pass through a cell containing a transparent liquid. Light is emitted along the surfaces of cones centered in each of the two beams with an angular extent equal to twice the crossing angle between the two incident beams. The origin of this effect is attributed to a combination of modulational instability, two-beam emission, and nonlinear Bragg diffraction.

© 2006 Optical Society of America

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