Towards subpicosecond pulses from solid target plasma based seeded soft X-ray laser

Pandey, Alok Kumar; Papagiannouli, Irène; Sanson, F.; Baynard, Elsa; Demailly, J.; Kazamias, S.; Pittman, M.; Neveu, O.; Lucas, Bruno; Marec, A. Le; Klisnick, A.; Calisti, A.; Larroche, O.; Ros, D.; Guilbaud, Olivier

doi:10.1364/oe.399339

Cited by 8 publications

(8 citation statements)

References 29 publications

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“…1. High-harmonic generation is driven by the low-energy beamline of the LASERIX multibeam platform at the University of Paris-Saclay [9]. The near-infrared (IR) beam of central wavelength 815 nm, pulse duration ~45 fs, and diameter ~24 mm at 1/ 2 , drives HHG at a 10 Hz repetition rate.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Single-shot wavefront characterization of high topological charge extreme-ultraviolet vortex

Pandey

Guilbaud

Sanson

et al. 2021

International Conference on X-Ray Lasers 2020

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We present an experimental intensity and wavefront characterization of the infrared vortex driver as well as the extreme ultraviolet vortex obtained through high harmonic generation in an extended generation medium. In a loose focusing geometry, an intense vortex beam obtained through phase-matched absorption-limited high harmonic generation in a 15 mm long Argon filled gas-cell permits single-shot characterization of the vortex structure. Moreover, our study validates the multiplicative law of momentum conservation even for such an extended generation medium.

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

Single-shot wavefront characterization of high topological charge extreme-ultraviolet vortex

Pandey

Guilbaud

Sanson

et al. 2021

International Conference on X-Ray Lasers 2020

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“…1 [13]. The lasing medium comprises an elongated laserproduced plasma in which Ne-like Titanium ions are excited by the plasma hot electrons through transient collisional excitation [14].…”

Section: Seeded Soft X-ray Laser Platformmentioning

confidence: 99%

“…The transient population inversion obtained between the 3p − 3s (J = 0 -1) ionic transition corresponds to the lasing wavelength λ = 32.6 nm. The lasing plasma is obtained in two steps [13,15]. A frequency-doubled 400 mJ Qswitched Nd YAG laser pulse of duration 10 ns is focused at normal incidence on a 4 mm Titanium target using a cylindrical lens to form a 5 mm × 80 μm focal line.…”

Section: Seeded Soft X-ray Laser Platformmentioning

confidence: 99%

“…Following the approach proposed by Le Marec et al [18,19], a curve fitting procedure has been developed to perform a quantitative analysis of these results. Further details of this analysis can be found in [13]; only a summary of the said procedure will be presented here. It is well known that the fringe visibility V(τ) is related to the Fourier transform of the laser spectral lineshape.…”

Section: Seeded Soft X-ray Laser Platformmentioning

confidence: 99%

“…The presented experimental results indicate that the efficient lasing and seeded operation observed for Φ = 32° pumping configuration was indeed achieved at an electron density two times higher than the routine conditions. One-dimensional Bloch Maxwell simulations have been performed to predict the seeded-XRL pulse duration in both configurations [13].…”

Section: Seeded Soft X-ray Laser Platformmentioning

confidence: 99%

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Solid-target seeded soft X-ray laser for short pulses and optical vortex amplification

Guilbaud

Pandey

Baynard

et al. 2021

International Conference on X-Ray Lasers 2020

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We report temporal coherence measurement of solid-target plasma-based soft X-ray laser (XRL) in amplified spontaneous emission (ASE) mode. By changing the XRL pumping angle, we generate lasing at two-times higher electron density than the routine condition. A relatively shorter coherence time at a higher pumping angle indicates a clear spectral signature of higher electron density in the gain region. We probe the amplification dynamics of XRL in routine, and high electron density conditions to confirm gain-duration reduction resulting from ionization gating in the latter case. We also present recent results on the seeding of a vortex beam carrying orbital angular momentum (OAM) in XRL plasma. A small part of the high topological charge extreme ultraviolet (EUV) vortex is injected in XRL. These preliminary results suggest that the vortex seed indeed can be efficiently amplified. In the end, we propose a pathway towards the seeding of the complete vortex beam and wavefront characterization of the amplified beam.

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Formation of Intense Attosecond Pulses in the Sequence of a Resonant Absorber and Active Medium of a Plasma-Based X-Ray Laser Modulated by an Optical Field

Khairulin

Antonov

Kocharovskaya

2021

Radiophys Quantum El

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We study the possibility of transforming quasi-monochromatic seeding X-ray radiation into an attosecond pulse train in the system composed of a resonant absorber (the plasma of hydrogen-like ions) and an active medium of a plasma-based X-ray laser (the plasma of identical ions in the excited state), which are modulated by the same optical field. In this case, the formation of pulses occurs in a modulated absorber, while the active medium is used for their subsequent amplification. It is shown that this approach significantly increases the energy of the pulses and improves their shape in comparison with the pulse formation directly in the modulated active medium of an X-ray laser. The obtained analytical solution shows that the pulse formation in the modulated absorber is due to the existence of a multifrequency structure of the resonant radiation, which propagates in the medium without absorption. It is shown, both analytically and numerically, that the spectraltemporal characteristics of the pulses are insensitive to changes in the optical thickness of each medium (absorbing and amplifying) over a wide range. The possibility of forming X-ray pulses with a wavelength of the order of 3.4 nm, having a duration of less than 200 as and a peak intensity exceeding 10 13 W/cm 2 , in the plasma of hydrogen-like C 5+ ions is shown.

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Towards subpicosecond pulses from solid target plasma based seeded soft X-ray laser

Cited by 8 publications

References 29 publications

Single-shot wavefront characterization of high topological charge extreme-ultraviolet vortex

Single-shot wavefront characterization of high topological charge extreme-ultraviolet vortex

Solid-target seeded soft X-ray laser for short pulses and optical vortex amplification

Formation of Intense Attosecond Pulses in the Sequence of a Resonant Absorber and Active Medium of a Plasma-Based X-Ray Laser Modulated by an Optical Field

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