1 kJ Petawatt Laser System for SG-II-U Program

Xu, Guangyu; Wang, Tao; Li, Zhaoyang; Dai, Yaping; Zhang, Lin; Gu, Yuming; Zhu, Jianqiang

doi:10.2184/lsj.36.1172

Cited by 37 publications

(16 citation statements)

References 4 publications

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“…The following is a summary, by country/institute, of the ultra-high-power lasers in Asia. At SIOM's National Laboratory on High Power Laser and Physics (NLHPLP) the first Nd:glass petawatt laser in China was built as an auxiliary beamline to the Shenguang (Divine Light) SG-II high-energy facility [119] and is still operational. SG-II was an eight-beam Nd:glass laser facility operating at a total of 6 kJ IR or 2 kJ at 3ω.…”

Section: Geographic Overview Of Facilities -Asiamentioning

confidence: 99%

Petawatt and exawatt class lasers worldwide

Danson

Haefner

Bromage

et al. 2019

High Pow Laser Sci Eng

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In the 2015 review paper ‘Petawatt Class Lasers Worldwide’ a comprehensive overview of the current status of high-power facilities of ${>}200~\text{TW}$ was presented. This was largely based on facility specifications, with some description of their uses, for instance in fundamental ultra-high-intensity interactions, secondary source generation, and inertial confinement fusion (ICF). With the 2018 Nobel Prize in Physics being awarded to Professors Donna Strickland and Gerard Mourou for the development of the technique of chirped pulse amplification (CPA), which made these lasers possible, we celebrate by providing a comprehensive update of the current status of ultra-high-power lasers and demonstrate how the technology has developed. We are now in the era of multi-petawatt facilities coming online, with 100 PW lasers being proposed and even under construction. In addition to this there is a pull towards development of industrial and multi-disciplinary applications, which demands much higher repetition rates, delivering high-average powers with higher efficiencies and the use of alternative wavelengths: mid-IR facilities. So apart from a comprehensive update of the current global status, we want to look at what technologies are to be deployed to get to these new regimes, and some of the critical issues facing their development.

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Section: Geographic Overview Of Facilities -Asiamentioning

confidence: 99%

Petawatt and exawatt class lasers worldwide

Danson

Haefner

Bromage

et al. 2019

High Pow Laser Sci Eng

Self Cite

790

406

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“…The parameters of the analyzed large aperture high power short pulse model are those of the SG-II laser system [18] . A short pulse of 290 mm near-field diameter (ninth-order FGB) and 5 ps pulse width (Gaussian) at a center wavelength of 1053 nm is focused by an OAP of 800 mm focal length and 320 mm diameter.…”

Section: Resultsmentioning

confidence: 99%

Output temporal contrast simulation of a large aperture high power short pulse laser system

Zhu

Xie

Ouyang

et al. 2014

High Pow Laser Sci Eng

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The work presented in this paper is a study of output temporal contrast degradation by near-field quality deterioration, such as intensity modulation and wavefront deviation, in a large aperture high power short pulse laser system. A twostep focusing algorithm with a coordinate transform based on the Fresnel approximation in the space domain is used for simulating the output focused by an off-axis parabolic mirror. The temporal contrast degradation by intensity modulation and wavefront deviation is analyzed and the influence of the diameter on the temporal contrast degradation is revealed. The simulation and assumption results based on the parameters of the Shen Guang-II laser system are compared with the online experimental temporal contrast data. The near-field quality deterioration might lead to temporal contrast degradation, hindering higher temporal contrast in large aperture high power short pulse laser systems.

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“…The parameters used for modeling large aperture high power short pulse system are based on SG-II laser system 19 . A short pulse of 5 ps pulse width (Gaussian) at center wavelength of 1053 nm is focused by an OAP of 800 mm focal length and 320 mm diameter.…”

Section: Resultsmentioning

confidence: 99%

Analysis of temporal contrast degradation due to wave front deviation in large aperture ultra-short pulse focusing system

et al. 2014

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In extremely intense laser system used for plasma physics experiments, temporal contrast is an important property of the ultra-short pulse. In this paper, we theoretically study the temporal contrast degradation due to wave front deviation in large aperture ultra-short pulse focusing system. Two-step focusing fast Fourier transform (FFT) algorithm with the coordinate transform based on Fresnel approximation in space domain and Fourier integral transform method in time domain were used to simulate the focusing process spatially and temporally, in which the spatial distribution of ultrashort pulse temporal contrast characteristics at the focal spot is related to the wave front in large aperture off-axis parabolic mirror focusing optical system. Firstly, temporal contrast degradation due to wave front noise with higher spatial frequency is analyzed and appropriate evaluation parameter for large aperture ultra-short pulse focusing system is put forward from the perspective of temporal contrast. Secondly, the influence of wave front distortion with lower spatial frequency on temporal contrast is revealed comparing different degradation characteristics of various aberrations. At last, a method by controlling and optimizing the wave front to prevent temporal contrast degradation in large aperture ultrashort laser system is proposed, which is of great significance for high temporal contrast petawatt laser facilities.

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1 kJ Petawatt Laser System for SG-II-U Program

Cited by 37 publications

References 4 publications

Petawatt and exawatt class lasers worldwide

Petawatt and exawatt class lasers worldwide

Output temporal contrast simulation of a large aperture high power short pulse laser system

Analysis of temporal contrast degradation due to wave front deviation in large aperture ultra-short pulse focusing system

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