M. Kakehata et al., Measurement of high-intensity laser pulse widths by use of tunneling ionization of atoms and ions, J OPT SOC B, 17(9), 2000, pp. 1490-1497
We measured the pulse duration of amplified Ti:sapphire laser pulses by usi
ng the tunneling ionization of atoms and ions. Fringe-resolved autocorrelat
ion signals with various effective nonlinear orders are measured by means o
f counting the number of ions at different charge states by the time-of-fli
ght (TOF) method. The measured pulse widths agree well with the independent
ly measured pulse width if we consider the pulse distortion by a focusing l
ens. Measurement of multiply charged ions by a TOF device is useful for ext
ending the measurable intensity range and wavelength ranges. (C) 2000 Optic
al Society of America [S0740-3224(00)01309-6].