Nonlinear optical processes in sodium vapour excited with tunable femtosecond light pulses

摘要

This paper presents the results of the investigations of nonlinear optical processes in sodium vapour excited with tunable femtosecond light pulses. Efficient four-photon parametric superfluorescence along with the two different types of conical emission from sodium vapor have been demonstrated and analyzed for a wide (over 1200 cm/sup -1/) tuning range of femtosecond pump pulses.