Open AccessMeasurement of spatiotemporal coupling characteristics of ultra broadband pulsed laser beam based on spatial spectrum interferometric scanning
Author(s) -
中国工程物理研究院激光聚变中心,
中国工程物理研究院,
中国工程物理研究院激光聚变研究中心
Publication year - 2021
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.70.20210996
Subject(s) - optics , coupling (piping) , interferometry , laser , materials science , interference (communication) , broadband , near and far field , physics , aperture (computer memory) , acoustics , telecommunications , computer science , channel (broadcasting) , metallurgy
Optical elements such as stretcher, compressor and thick lenses will lead to spatially-dependent temporal properties of a large aperture laser pulse, which is called spatiotemporal coupling (STC). Beyond pure temporal characterization measurement, a measure of spatiotemporal coupling distortion based on spatial-spectral interference is proposed in this study. Full one-dimensional spatiotemporal coupling characteristics can be obtained in a single-shot measurement, and the complete spatiotemporal coupling characteristics in the near field can be obtained by scanning along another spatial dimension. The spatiotemporal coupling characteristics introduced by the wedge glasses are measured, and the experimental results accord well with the theoretical results.