Wavefront-correction for nearly diffraction-limited focusing of dual-color laser beams to high intensities

Zhao, Baozhen; Zhang, Jun; Chen, Shouyuan; Liu, Cheng; Golovin, Grigory; Banerjee, Sudeep; Brown, Kevin; Mills, Jared; Petersen, Chad; Umstadter, Donald

doi:10.1364/oe.22.026947

Cited by 9 publications

(5 citation statements)

References 20 publications

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“…Here, based on a 300 nm (700-1000 nm) broadband intense laser pulsed beam, the simulation shows that SSSF has limited spectral dependence due to a short interaction length in media (see Figure 19d,e), while long-distance free propagation in air/vacuum introduces obvious spatiospectral coupling (accordingly spatiotemporal coupling) in both amplitude (intensity) and phase (wavefront) (see Figure 19f,g). Typically, in order to suppress this diffraction distortion, image relay (e.g., telescope) and adaptive optics (e.g., deformable mirror) technologies have been introduced in almost all large-aperture high-energy or high-peak-power laser facilities, [285,[287][288][289] and free propagations are controlled within their Rayleigh lengths. In addition, for a broadband short-pulse PW laser, the traditional transmission telescopes should be replaced by all-reflection or achromatic telescopes for broadband image relay.…”

Section: Beam Qualitymentioning

confidence: 99%

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: Beam Qualitymentioning

confidence: 99%

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

Leng

2022

Laser & Photonics Reviews

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“…The 80% reflected beam was compressed to 34 fs and focused by a f/14 parabolic mirror to a 20 um (FWHM) Gaussian focal spot. An adaptive optic loop composed of a deformable mirror and a wavefront sensor was used to compensate the optical aberrations 44 . We also used an adaptive closed loop to compensate spectral phase distortion 45 .…”

Section: Methodsmentioning

confidence: 99%

Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging

Golovin

Banerjee

Liu

et al. 2016

Sci Rep

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The recent combination of ultra-intense lasers and laser-accelerated electron beams is enabling the development of a new generation of compact x-ray light sources, the coherence of which depends directly on electron beam emittance. Although the emittance of accelerated electron beams can be low, it can grow due to the effects of space charge during free-space propagation. Direct experimental measurement of this important property is complicated by micron-scale beam sizes, and the presence of intense fields at the location where space charge acts. Reported here is a novel, non-destructive, single-shot method that overcame this problem. It employed an intense laser probe pulse, and spectroscopic imaging of the inverse-Compton scattered x-rays, allowing measurement of an ultra-low value for the normalized transverse emittance, 0.15 (±0.06) π mm mrad, as well as study of its subsequent growth upon exiting the accelerator. The technique and results are critical for designing multi-stage laser-wakefield accelerators, and generating high-brightness, spatially coherent x-rays.

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“…We chose the tight focusing geometry to maximize the injector pulse intensity and access the regime of ponderomotive drift and wake-wake interference injection. Adaptive closed-loop feedback-control systems corrected the spectral phase distortions [35] and spatial aberrations [36] of both pulses. The pulses were polarized in the horizontal plane and intersected at an oblique angle (155°) inside a 2-mm gas jet [37].…”

mentioning

confidence: 99%

Electron Trapping from Interactions between Laser-Driven Relativistic Plasma Waves

et al. 2018

Self Cite

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Interactions of large-amplitude relativistic plasma waves were investigated experimentally by propagating two synchronized ultraintense femtosecond laser pulses in plasma at oblique crossing angles to each other. The electrostatic and electromagnetic fields of the colliding waves acted to preaccelerate and trap electrons via previously predicted, but untested injection mechanisms of ponderomotive drift and wake-wake interference. High-quality energetic electron beams were produced, also revealing valuable new information about plasma-wave dynamics.

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Wavefront-correction for nearly diffraction-limited focusing of dual-color laser beams to high intensities

Abstract: -correction for nearly diffraction limited focusing of dual-color laser beams to high intensities" (2014 Eidmann, C. Gahn, A. Machacek, J. S. Wark, and K. Witte, "Role of the plasma scale length in the harmonic generation from solid targets," Phys. Rev. E Stat.

Cited by 9 publications

References 20 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

Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging

Electron Trapping from Interactions between Laser-Driven Relativistic Plasma Waves

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