Time-delayed nonlinear absorption effects on spatiotemporal propagation for femtosecond pulses

摘要

Abstract: We investigate the effects of time delayed nonlinear absorption (Raman effect) on spatiotemporal propagation for femtosecond pulses. In the case of normal dispersion and no Raman effect, we find symmetric pulse splitting, in agreement with previous work. However, as the magnitude of the Raman effect increases relative to the dispersion, asymmetric splitting occurs. For significant Raman effect, the pulse splitting due to GVD is suppressed.!4