We report the observation of conical diffraction induced by cross-phase modulation when a strong beam is copropagating with a weak beam through a cell containing dimethylsulfoxide. Pulsed laser beams at 1064 and 597 nm, in the transparency window of the material, were used. The phenomenon is attributed to third-order nonlinear susceptibility, and the ring observed at the far-field region is theoretically predicted by use of the Fresnel–Kirchhoff diffraction formalism.
© 2003 Optical Society of America
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
Viviane Pilla, Leonardo de S. Menezes, Márcio A. R. C. Alencar, and Cid B. de Araújo, "Laser-induced conical diffraction due to cross-phase modulation in a transparent medium," J. Opt. Soc. Am. B 20, 1269-1272 (2003)