title: Single-shot pulse-contrast measurement based on high-order quasi-phase-matching cross-correlation.
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 ~10(7), demonstrates an artifacts-free measurement with a temporal window of ~70 ps and a resolution of ~900 fs.
authors.affiliation: Department of Optical Science and Engineering, Fudan University, Shanghai, China.
authors.forename: Jingui
authors.initials: J
authors.lastname: Ma
authors.forename: Yongzhi
authors.initials: Y
authors.lastname: Wang
authors.forename: Peng
authors.initials: P
authors.lastname: Yuan
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Xie
authors.forename: Heyuan
authors.initials: H
authors.lastname: Zhu
authors.forename: Liejia
authors.initials: L
authors.lastname: Qian