Cross-correlation frequency-resolved optical gating by molecular alignment for ultraviolet femtosecond pulse measurement

We experimentally demonstrate a molecular-alignment-based cross-correlation frequency-resolved optical gating technique for ultraviolet femtosecond pulse measurement, which use laser-induced impulsive alignment of gaseous molecules as the gate function instead of the phase-matched frequency mixing process in a nonlinear crystal. The spectrogram measurements and retrieving results of the intensity and phase of the second and third harmonic pulses centered at 400 and 267 nm are presented. (C) 2010 American Institute of Physics. [doi:10.1063/1.3478008]