title: Measuring pulse-front tilt in ultrashort pulses using GRENOUILLE.
abstract: We show that the spatio-temporal distortion, pulse-front tilt, is naturally, easily, and sensitively measured by the recently demonstrated, extremely simple variation of single-shot second-harmonic generation frequency-resolved optical gating (SHG FROG): GRENOUILLE. While GRENOUILLE traces are ordinarily centered on the zero of delay, a pulse with pulse-front tilt yields a trace whose center is shifted to a nonzero delay that is proportional to the pulse-front tilt. As a result, the trace-center shift reveals both the magnitude and sign of the pulse-front tilt-independent of the temporal pulse intensity and phase. The effects of pulse-front tilt can then easily be removed from the trace and the intensity and phase vs. time also retrieved, yielding a full description of the pulse in space and time.
authors.forename: Selcuk
authors.initials: S
authors.lastname: Akturk
authors.forename: Mark
authors.initials: M
authors.lastname: Kimmel
authors.forename: Patrick
authors.initials: P
authors.lastname: O'Shea
authors.forename: Rick
authors.initials: R
authors.lastname: Trebino