Dynamical Description of Transient X-Ray Lasers Seeded with High-Order Harmonic Radiation through Maxwell-Bloch Numerical Simulations

Al’Miev, I. R.; Larroche, O.; Benredjem, D.; Dubau, J.; Kazamias, S.; Möller, C.; Klisnick, A.

doi:10.1103/physrevlett.99.123902

Cited by 46 publications

(35 citation statements)

References 15 publications

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“…This means that the laser gain in the plasma amplifier lasts in total 8 ps after the plasma creation or 5 ps after the amplification peak. The final amplified pulse will have a temporal envelope starting from the HOH pulse and growing after it as a wake [4,7]. Its temporal extension will be limited by the plasma gain duration.…”

mentioning

confidence: 99%

Fourier-limited seeded soft x-ray laser pulse

et al. 2010

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confidence: 99%

Fourier-limited seeded soft x-ray laser pulse

et al. 2010

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“…Seeding of the amplification can allow much more spatially uniform and coherent laser output as long as the amplification of the seeded beam dominates ASE (the subject of this paper). Using Maxwell-Bloch simulations, recent work by Al'miev et al (2007) has shown that short duration, broad bandwidth harmonic radiation injected into a plasma amplifier with a narrow gain bandwidth leads to an amplified output pulse of temporal duration consistent with the gain bandwidth rather than the harmonic bandwidth.…”

Section: Introductionmentioning

confidence: 91%

The output of a laser amplifier with simultaneous amplified spontaneous emission and an injected seed

Huang

Tallents

2009

Laser Part. Beams

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The minimum irradiance needed to overcome amplified spontaneous emission (ASE) of a seed beam injected into a laser amplifier is evaluated. The treatment is particularly applicable to extreme ultraviolet (EUV) and X-ray laser schemes to inject laser harmonic radiation as a seed into (1) plasma laser amplifiers and (2) free-electron lasers. Simple expressions and calculations are given for the minimum injected irradiance required for amplification of the injected seed beam to exceed ASE from the amplifier, including the effects of gain saturation, assuming one dimensional radiative transfer.

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“…For longer distances, the interaction between the electric field and the atomic populations starts developing Rabi oscillations, saturating the gain, and reducing the duration of the wake. At 4 mm, the typical structure of the beam is fully developed: a barely amplified HHG pulse and a wake presenting Rabi oscillations and polarization decay [62][63][64]. After 4 mm, ASE starts to become important.…”

Section: The Bloch-maxwell Treatmentmentioning

confidence: 97%

Towards Tabletop X‐Ray Lasers

Zeitoun

Oliva

et al. 2014

Attosecond and XUV Physics

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Short pulses in the X-ray regime offer unique opportunities for the study of ultrafast processes in biology, chemistry and physics. The absorption of X-rays can occur with high spectral selectivity for direct chemical or physical analysis, the very low diffraction limit of X-rays is useful for imaging and physical analysis, and the short wavelength supports extremely short pulses in the attosecond (1 as D 10 18 s) and even zeptosecond (1 zs D 10 21 s) range [1,2]. Over the past few years, X-ray sources have reached higher and higher intensities by either reducing the pulse duration and the size of the focal spot, or by increasing the energy available in the generating process.The availability of X-ray pulses with ultrahigh intensity has opened new avenues for nonlinear physics and ultrafast imaging (see Chapter 17). A major concern in the field of ultrafast imaging is the danger of sample decomposition due to ionization by X-rays before the diffraction image (2D or 3D) is acquired. A theoretical study by Neutze et al. proposed that the ideal light source for this type of imaging should have about 10 12 photons in a fully coherent pulse with 5 fs duration or less, and with 12 keV photon energy [3]. For soft X-ray imaging (typically 30 eV to 1 keV photon energy), the parameters differ significantly. This energy range corresponds to wavelengths from 30 nm down to 1 nm, allowing experiments with diffraction-limited resolution of a few nanometers. Unlike the case discussed by Neutze, diffraction will not occur on molecular electrons but on nanoscale structures or sample structural variation. The bulk matter structure does not evolve as fast as molecular electrons, which often acquire relativistic speed. The relevant time scales are therefore defined by the speed of sound, typically 10 4 ms 1 for the density and temperature under consideration. To reach a target spatial resolution of 1 nm, the soft X-ray pulse duration should be on the order of 100 fs to prevent blurring during image exposure at the irradiation levels considered.Soft X-rays are often absorbed by the sample, reducing the signal flux at the detector. Hence the experiments require a high energy per pulse. To find an esAttosecond and XUV Physics, First Edition. Edited by Thomas Schultz and Marc Vrakking.

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Dynamical Description of Transient X-Ray Lasers Seeded with High-Order Harmonic Radiation through Maxwell-Bloch Numerical Simulations

Cited by 46 publications

References 15 publications

Fourier-limited seeded soft x-ray laser pulse

Fourier-limited seeded soft x-ray laser pulse

The output of a laser amplifier with simultaneous amplified spontaneous emission and an injected seed

Towards Tabletop X‐Ray Lasers

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