Abstract
We propose a simple configuration of a real-time fringe-resolved autocorrelator for measuring a duration and a frequency chirp of ultrafast optical pulse, which is composed of two glass plates, a convex lens and a two-photon detector. The autocorrelator enables us to estimate relatively longer pulsewidths easily and stably by spinning one of the glass plates. The feature of the autocorrelator is examined numerically using the diffraction formula. We demonstrate a real-time fringe-resolved autocorrelation of picosecond optical pulse using the proposed autocorrelator and reconstruct the pulse intensity and phase by applying the technique of the iterative reconstruct interference signals (IRIS).
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