SYSTEM FOR MEASURING THE DURATION, TIME PROFILE AND SPECTRUM OF AN ULTRA-FAST LASER PULSE

摘要

The invention relates to a system for measuring the duration, time profile and spectrum of an ultra-fast laser pulse, comprising a single-shot optical correlator with wavefront division (10, 11), a non-linear optical crystal (20) arranged so that a first divided wavefront and a second divided wavefront superpose in the non-linear optical crystal (20), an optical system (22) forming an image of the non-linear optical crystal on a detection system (30), a filtering device (21, 23) arranged between the non-linear optical crystal (20) and the detection system (30) and configured to detect both a second-order single-shot interferometric autocorrelation trace at the optical double frequency (2ω) as well as at least one other first-order single-shot interferometric autocorrelation trace at the fundamental optical frequency (ω) or a second-order intensimetric trace at the optical double frequency (2ω).