Open AccessSimultaneous measurement of the absolute and relative time delay of a tiled-aperture coherent beam combination via the double-humped spectral beam interferometry
Author(s) -
Keyang Liu,
Liwei Song,
Yanqi Liu,
Xinliang Wang,
Zhiyuan Huang,
Yue-Hua Tang,
Xiaobin Wang,
Zhengzheng Liu,
Yuxin Leng
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.405430
Subject(s) - optics , jitter , beam (structure) , physics , laser , interferometry , aperture (computer memory) , root mean square , laser beam quality , m squared , range (aeronautics) , laser beams , materials science , computer science , telecommunications , acoustics , quantum mechanics , composite material
Coherent beam combination (CBC) is a promising technology for achieving several hundred petawatts and even EW-level lasers. However, the measurement of the synchronization error and the time jitter of CBC is one of key technical issues, especially in the few-cycle PW-level laser facilities. In this paper, we demonstrate that the absolute time delay (ATD) and the relative time delay (RTD) for a tiled-aperture CBC can simultaneously be measured by using the double-humped spectral beam interferometry. The experimental study also was demonstrated. A root-mean-square deviation of approximately λ/38 (70 as) and a combining efficiency of 87.3% at 1 Hz closed feedback loop was obtained, respectively. Due to the wide adjustment range and a vast resisting beam energy disturbance capacity, this technique provide an effective and practical solution for measuring simultaneously the ATD and the RTD in the few-cycle PW-level laser pulses CBC.