Simulating an ultra-broadband concept for Exawatt-class lasers

Li, Zhaoyang; Kato, Yoshiaki; Kawanaka, Junji

doi:10.1038/s41598-020-80435-6

Cited by 38 publications

(43 citation statements)

References 72 publications

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“…Yet, this provides for the first time a glimpse of the full spatio-temporal properties of high-power ultrashort laser pulses while they are being produced, and illustrates the potential of applying the latest generation of ultrafast diagnostics not only at the output of but also inside ultrashort laser systems. We hope that this will help open new trends in the development, control and optimization of ultrashort light sources-especially the most sophisticated ones, such as Optical Parametric Chirped-pulse Amplification [14], Frequency-domain Optical Parametric Amplification systems [15], systems with coherent combination [16,17], compressors based on tiled gratings [18][19][20], or even more exotic scenarios to go beyond the Petawatt power range in future generations [21]. Fig.…”

Section: Hhg Spectroscopymentioning

confidence: 99%

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

Jeandet,

Jolly,

Borot

et al. 2021

Preprint

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The investigation of spatio-temporal couplings (STCs) of broadband light beams is becoming a key topic for the optimization as well as applications of ultrashort laser systems. This calls for accurate measurements of STCs. Yet, it is only recently that such complete spatio-temporal or spatio-spectral characterization has become possible, and it has so far mostly been implemented at the output of the laser systems, where experiments take place. In this survey, we present for the first time STC measurements at different stages of a collection of high-power ultrashort laser systems, all based on the chirped-pulse amplification (CPA) technique, but with very different output characteristics. This measurement campaign reveals spatio-temporal effects with various sources, and motivates the expanded use of STC characterization throughout CPA laser chains, as well as in a wider range of types of ultrafast laser systems. In this way knowledge will be gained not only about potential defects, but also about the fundamental dynamics and operating regimes of advanced ultrashort laser systems.

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Section: Hhg Spectroscopymentioning

confidence: 99%

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

Jeandet,

Jolly,

Borot

et al. 2021

Preprint

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“…Current worldwide activities concerning PW laser systems and further envisions to attain lasers are summarized in Danson et al. (2019) and Li, Kato & Kawanaka (2021).…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray flash in the interaction of a tightly focused single-cycle ultra-intense laser pulse with a solid target

et al. 2022

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We employ the $\lambda ^{3}$ regime where a near-single-cycle laser pulse is tightly focused, thus providing the highest possible intensity for the minimal energy at a certain laser power. The quantum electrodynamics processes in the course of the interaction of an ultra-intense laser with a solid target are studied via three-dimensional particle-in-cell simulations, revealing the generation of copious $\gamma$ -photons and electron–positron pairs. A parametric study of the laser polarisation, target thickness and electron number density shows that a radially polarised laser provides the optimal regime for $\gamma$ -photon generation. By varying the laser power in the range of 1 to 300 PW we find the scaling of the laser to $\gamma$ -photon energy conversion efficiency. The laser-generated $\gamma$ -photon interaction with a high- $Z$ target is further studied using Monte Carlo simulations revealing further electron–positron pair generation and radioactive nuclide creation.

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“…Large values of B-integral enable a significant increase of the compression ratio. Also worthy of notice is the demonstration of two-stage compression [19,20] and the theoretical works on detailed numerical modeling [21][22][23] and on expanding the capabilities of the technique aimed at simultaneous contrast enhancement [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Use of KDP crystal as a Kerr nonlinear medium for compressing PW laser pulses down to 10 fs

Shaykin

Гинзбург

Yakovlev

et al. 2021

High Pow Laser Sci Eng

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The input pulse of the laser PEARL with energy of 18 J and pulse duration of about 60 fs was compressed to 10 fs after passage through a 4-mm thick KDP crystal and reflection at two chirped mirrors with sum dispersion −200 fs 2 . The experiments were performed for the В-integral values from 5 to 19 without visible damages of the optical elements, which indicates that small-scale self-focusing is not a significant issue. It was shown that, by virtue of the low dispersion of the group velocity, the KDP crystal has some advantages over silica: a larger pulse compression coefficient, especially at a small value of the В-integral (B=5…9), lower absolute values of chirped mirror dispersion, and also a possibility to control the magnitude of nonlinearity and dispersion by changing crystal orientation.

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Simulating an ultra-broadband concept for Exawatt-class lasers

Cited by 38 publications

References 72 publications

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

A Survey of Spatio-Temporal Couplings throughout High-Power Ultrashort Lasers

Gamma-ray flash in the interaction of a tightly focused single-cycle ultra-intense laser pulse with a solid target

Use of KDP crystal as a Kerr nonlinear medium for compressing PW laser pulses down to 10 fs

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