Temporal contrast enhancement of ultrashort pulses using a spatiotemporal plasma-lens filter

Zhu, Ping; Zigler, A.; Xie, Xinglong; Zhang, Dongjun; Yang, Qingxi; Sun, Meizhi; Papeer, J.; Kang, Jun; Gao, Qi; Liang, Xiao; Zhu, Hongsong; Guo, Ainlin; Liang, Yan; Ji, Shengzhe; Ren, Lei; Liu, Huiya; Kang, Ning; Zhao, Yao; Zhu, Jianqiang

doi:10.1364/ol.388391

Cited by 6 publications

(5 citation statements)

References 25 publications

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“…Similar as the above two methods, a plasma-lens filter method recently was proposed, however, the experiment result shows that the contrast improvement, especially around the main signal pulse, was very limited. [274] In conclusion, the recent status is, at the front-end, by using the XPW, a >10 11 temporal contrast clean pulse can be produced experimentally. However, at the rear-end, the contrast improvement is relatively limited (generally about 100-1000 times), no matter using the nonlinear Fourier filter or the plasma mirror, and the transmission efficiency of these two methods is not high (around 40-50%).…”

Section: Temporal Contrastmentioning

confidence: 92%

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Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Leng

2022

Laser & Photonics Reviews

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The petawatt (PW) laser has experienced a rapid development in the past two decades, and tens of giant facilities have been constructed worldwide. After realizing 10–100 PW, it seems to be close to some sort of engineering limit but its focused peak intensity still is much lower than the Schwinger limit, and therefore some technology improvements or innovations become indispensable for further increasing the peak power as well as the focused peak intensity. By quick reviewing the development of the PW laser in history, it is shown that reducing the pulse duration to near a single optical cycle is a feasible (easy and cheap) choice for this purpose. Here, technologies for the optical‐cycle pulse generation, ultrabroadband amplification, and capability boosting that aim to provide possible approaches for optical‐cycle PW lasers are briefly reviewed and discussed. Meanwhile, key bottlenecks that challenge the current as well as the future short‐pulse PW lasers and their possible solutions are summarized and discussed. This technology review aims to provide a possible roadmap for the next‐stage development of the short‐pulse PW laser.

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Section: Temporal Contrastmentioning

confidence: 92%

“…Similar as the above two methods, a plasma‐lens filter method recently was proposed, however, the experiment result shows that the contrast improvement, especially around the main signal pulse, was very limited. [ 274 ]…”

Section: Bottlenecksmentioning

confidence: 99%

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Leng

2022

Laser & Photonics Reviews

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“…An exceptional result was introduced in 2020, with an approach based on a spatial NL plasma lens that was generated by an auxiliary pump beam [ 17 ] . While achieving contrast enhancement (CE) of two orders of magnitude, with impressive efficiency of approximately 80%, such a method entails significant awkwardness, as it necessitates slaving a secondary laser into the process and accurately synchronizing it with the main laser.…”

Section: Introductionmentioning

confidence: 99%

A simple method for pulse contrast enhancement via self-focusing

Refaeli,

Marcus,

Shamir

2023

High Pow Laser Sci Eng

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Here we report on a simple-to-implement and cost-effective approach for laser pulse contrast enhancement, based on the χ (3) nonlinear self-focusing effect. An intentionally induced and gently controlled self-focusing in a thin glass transforms the time-dependent intensity into variation in beam divergence. Followed by a spatial discriminating filter, only the strongly focused fraction traverses the setup, at the expense of efficiency. A numerical model, accounting for the pulse and material parameters via a Gaussian ABCD matrix, provides an estimate for the instantaneous beam waist and transmission efficiency, which enables us to evaluate the resulting contrast enhancement. The estimated contrast enhancement spans between 0.5 and 2.5 orders of magnitude, in conjunction with approximately 25%-90% estimated efficiency, depending on the pulse parameters. In a preliminary experiment we demonstrated the effect with 10s-µJ sub GW regime with approximately 40% efficiency and a contrast improvement of more than or equal to 20 dB.

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“…These are so intricately intertwined that it is difficult to eliminate them. To solve these problems, various methods have been developed to improve temporal contrast actively, including Pockels cells, cross-polarized waves [15] , saturable absorbers [16] , second harmonic conversion [17] and plasma lens filters [18] . Plasma mirrors (PMs) [19][20][21] have been adopted in many experimental facilities to improve temporal contrast at full power with TW to PW lasers after pulse compression, just before the target.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the plasma mirror system at the J-KAREN-P facility

Kon

Nishiuchi²,

Fukuda³

et al. 2022

High Pow Laser Sci Eng

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We report on the design and characterisation of the plasma mirror system installed on the J-KAREN-P laser at the National Institutes for Quantum Science and Technology, Kansai Photon Science Institute. The reflectivity of the single plasma mirror system exceeded 80%. Additionally, the temporal contrast was improved by two orders of magnitude at 1 ps before the main pulse. Furthermore, the laser near field spatial distribution after the plasma mirror was kept constant at plasma mirror fluence <100 kJ/cm2. We also

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Temporal contrast enhancement of ultrashort pulses using a spatiotemporal plasma-lens filter

Cited by 6 publications

References 25 publications

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

Further Development of the Short‐Pulse Petawatt Laser: Trends, Technologies, and Bottlenecks

A simple method for pulse contrast enhancement via self-focusing

Characterization of the plasma mirror system at the J-KAREN-P facility

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