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

Olivier Guilbaud; Alok-Kumar Pandey; Elsa Baynard; Irene papagiannouli; Fabrice Sanson; Julien Demailly; Sophie Kazamias; Moana Pittman; Olivier Neveu; Bruno Lucas; Annette Calisti; Andrea Le Marec; Annie Klisnick; Olivier Larroche; F. Harms; G. Beaugrand; G. Dovillaire; Ph. Balcou; David Ros

doi:10.1117/12.2593356

8 July 2021 Solid-target seeded soft X-ray laser for short pulses and optical vortex amplification

Olivier Guilbaud, Alok-Kumar Pandey, Elsa Baynard, Irene papagiannouli, Fabrice Sanson, Julien Demailly, Sophie Kazamias, Moana Pittman, Olivier Neveu, Bruno Lucas, Annette Calisti, Andrea Le Marec, Annie Klisnick, Olivier Larroche, F. Harms, G. Beaugrand, G. Dovillaire, Ph. Balcou, David Ros

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Proceedings Volume 11886, International Conference on X-Ray Lasers 2020; 118860B (2021) https://doi.org/10.1117/12.2593356
Event: XVII International Conference on X-Ray Lasers, 2020, Online Only

Abstract

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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Olivier Guilbaud, Alok-Kumar Pandey, Elsa Baynard, Irene papagiannouli, Fabrice Sanson, Julien Demailly, Sophie Kazamias, Moana Pittman, Olivier Neveu, Bruno Lucas, Annette Calisti, Andrea Le Marec, Annie Klisnick, Olivier Larroche, F. Harms, G. Beaugrand, G. Dovillaire, Ph. Balcou, and David Ros "Solid-target seeded soft X-ray laser for short pulses and optical vortex amplification", Proc. SPIE 11886, International Conference on X-Ray Lasers 2020, 118860B (8 July 2021); https://doi.org/10.1117/12.2593356

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