The supercontinuum light generated by oblique intense 100-fs ultrafast laser pulses was found to bend from the direction of the incident pulses. The emission direction of the anti-Stokes continuum that is due to self-phase modulation bends to one side, while the conical ring that is due to four-photon parametric generation bends to the other side. The self-bending of supercontinuum emissions is attributed to the spatial variation of the refractive index induced by the oblique pulse front, which causes the refraction of light for self-phase-modulation emission and the bending of the wave vector for the four-photon parametric generation.
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Xing et al. (1993) studied this question.
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