Effect of Group Velocity Mismatch on Second Harmonic Autocorrelation Considering Different Pulse Shapes

Abstract

The use of second harmonic generation as a technique for ultrashort optic pulse width measurement is analyzed to determine in detail the effect of group velocity mismatch (G\TM) between fundamental and second harmonic fields when considering different pulse shapes. We find that for interferometric autocorrelation and intensity autocorrelation, GVM has different effects versus different pulseshapes.