Open AccessComplex spatiotemporal coupling distortion pre-compensation with double-compressors for an ultra-intense femtosecond laser
Author(s) -
Zhaoyang Li,
Junji Kawanaka
Publication year - 2019
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.27.025172
Subject(s) - optics , femtosecond , gas compressor , laser , wavefront , distortion (music) , diffraction , coupling (piping) , materials science , pulse shaping , reflection (computer programming) , ultrashort pulse , deformable mirror , diffraction grating , physics , amplifier , optoelectronics , computer science , cmos , metallurgy , thermodynamics , programming language
In an ultra-intense femtosecond chirped-pulse amplification laser, the imperfect diffraction wave-fronts of the second and the third gratings of the compressor, where spatio-spectral coupling exists, could introduce a complex spatiotemporal coupling distortion (STCD) and degrade the pulsed beam in both near- and far-fields. Here, we propose a method of double-compressors for pre-compensation. By inserting a scaled down compressor (small compressor) with a deformable retro-reflection mirror into the beam-line, the frequency-dependent wave-front distortion, i.e., the complex STCD, could be removed. We simulate the results in two different ultra-intense femtosecond lasers with 80 and 400 nm bandwidths for comparison, and near ideal focused peak intensities could be obtained in both cases. Meanwhile, the influences of several miss-matching effects, which might appear in engineering, are also analyzed and discussed for applications.