Abstract
Spatial and temporal instabilities are known to occur when light propagating in a Kerr medium is modulated spatially and temporally, respectively. The simultaneous presence of diffraction and dispersion in nonlinear media gives rise to spatiotemporal instabilities.1 The analysis in previous research accounted for group-velocity dispersion (GVD) in the slowly-varying-envelope approximation (SVEA). However, the self-focusing of femtosecond pulses in dispersive media is not adequately described by the SVEA.2 This paper deals with the theoretical analysis of spatiotemporal instabilities of femtosecond pulses propagating in a nonlinear medium.
© 1995 Optical Society of America
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