We report experimental observations of the spatial splitting of a probe beam caused by a strong pump beam of different optical frequency. The measurements were performed in a self-defocusing nonlinear medium (semiconductor-doped glass). The physical interpretation of this phenomenon is based on the variation of the sample’s refractive index at the probe-beam frequency, which is due to the effect of spatial cross modulation induced by the pump beam.
© 1994 Optical Society of America
H. Ma and Cid B. de Araújo, "Nonlinear fission of an optical beam through spatial cross modulation in semiconductor-doped glasses," J. Opt. Soc. Am. B 11, 1512-1514 (1994)