Related Experiment Video
Updated: May 17, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Single-shot pulse-contrast measurement based on high-order quasi-phase-matching cross-correlation
Jingui Ma1, Yongzhi Wang, Peng Yuan
1Department of Optical Science and Engineering, Fudan University, Shanghai, China.
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.
Related Concept Videos
Phase Contrast and Differential Interference Contrast Microscopy
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
2D NMR: Overview of Heteronuclear Correlation Techniques
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
2D NMR: Overview of Homonuclear Correlation Techniques
COSY90 is the standard two-dimensional (2D) COSY experiment that...
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...

