Spatiotemporal focusing does not always improve axial intensity localization
Optics
2015-04-21 v1
Abstract
We report on an experimental comparison on critical intensities of nonlinear self-focusing in air with conventional focusing and spatiotemporal focusing schemes. Our results show that the conventional focusing with the focal lens completely filled with the incident beam allows for the strongest axial intensity confinement against the self-focusing effect. This is because that in the high-numerical-aperture condition, the focal spot will have a compact size which results in a high focal intensity. Meanwhile, the Rayleigh length of the focused beam will be substantially shortened which efficiently postpones the onset of self-focusing.
Cite
@article{arxiv.1504.05130,
title = {Spatiotemporal focusing does not always improve axial intensity localization},
author = {Ya Cheng and Hongqiang Xie and Zhaohui Wang and Guihua Li and Bin Zeng and Fei He and Wei Chu and Jinping Yao and Lingling Qiao},
journal= {arXiv preprint arXiv:1504.05130},
year = {2015}
}
Comments
5 pages, 2 figures