Abstract

We propose a novel single-shot pulse-contrast measurement approach based on high-order quasi-phase-matching (QPM) cross correlation. It supports perfect contrast measurement with features of no artifacts, high resolution, and large temporal window. The prototype experiment based on the noncollinear third QPM with a beam crossing angle of 90 deg, using femtosecond Ti:sapphire laser pulses with a contrast of $\sim {10}^7$, demonstrates an artifacts-free measurement with a temporal window of $\sim 70\mathrm{ps}$ and a resolution of $\sim 900\mathrm{fs}$.

© 2012 Optical Society of America

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