Abstract

Recently, we developed a simple and general technique, which we call Frequency-Resolved Optical Gating (FROG), that succeeds in measuring the full intensity and phase evolution of an individual, arbitrary ultrashort pulse.^1–3 In brief, FROG involves measuring the pulse spectrogram, i.e., the spectrum of the signal pulse in an auto- or cross-correlation (using any instantaneous nonlinearity), yielding signal intensity vs. delay and frequency.

© 1994 Optical Society of America