Linear autocorrelation of partially coherent extreme-ultraviolet lasers: a quantitative analysis

Marec, A. Le; Larroche, O.; Klisnick, A.

doi:10.1364/ol.42.004958

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…This behavior is consistent with a relatively higher electron density in the gain region that leads to a larger spectral bandwidth and hence, a smaller coherence time. 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.…”

Section: Seeded Soft X-ray Laser Platformmentioning

confidence: 99%

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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Section: Seeded Soft X-ray Laser Platformmentioning

confidence: 99%

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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Temporal modes of stationary and pulsed quasistationary electromagnetic beams

et al. 2018

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We present a novel time-domain coherent-mode representation for random, stationary electromagnetic beams. We subsequently introduce random, quasistationary pulsed electromagnetic beams and develop an analogous (pseudo) mode decomposition for them as well. The former decomposition is valid provided the time window in which the field is considered is much longer than the coherence time, while the latter requires the field to vanish outside the window. For stationary beams, the theory is demonstrated by an example illustrating the role of polarization in the representation. In both cases, the data needed for the construction of the mode decomposition are straightforward to measure. The formalisms enable us to treat random vector-light beams in the time domain in terms of deterministic fields. We expect that the modal representations will find a wide range of applications in problems involving spatiotemporal propagation of temporally partially coherent light in optical systems.

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

Pandey¹,

Papagiannouli²,

Sanson³

et al. 2020

Opt. Express

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We investigate the coherence of plasma-based soft X-ray laser (XRL) for different conditions that can alter the electron density in the gain region. We first measure the source temporal coherence in amplified spontaneous emission (ASE) mode. We develop a data analysis procedure to extract both its spectral width and pulse duration. These findings are in agreement with the spectral line shape simulations and seeded operation experimental results. Utilizing the deduced spectral width and pulse duration in a one-dimensional Bloch-Maxwell code, we reproduce the experimental temporal coherence properties of the seeded-XRL. Finally, we demonstrate efficient lasing in ASE and seeded mode at an electron density two times higher than the routine conditions. In this regime, using Bloch-Maxwell modeling, we predict the pulse duration of the seeded XRL to be ∼500fs.

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Linear autocorrelation of partially coherent extreme-ultraviolet lasers: a quantitative analysis

Cited by 4 publications

References 21 publications

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

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

Temporal modes of stationary and pulsed quasistationary electromagnetic beams

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

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