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Avalanche of stimulated forward scattering in high harmonic generation

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10.1364/OE.24.008028
 
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hdl:2117/86479

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Serrat Jurado, CarlesMés informacióMés informacióMés informació
Roca, David
Budesca, Josep M.
Seres, Jozsef
Seres, Enikoe
Aurand, Bastian
Hoffmann, Andreas
Namba, Shinichi
Kuehl, Thomas
Spielmann, Christian
Document typeArticle
Defense date2016-04-05
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Optical amplifiers in all ranges of the electromagnetic spectrum exhibit an essential characteristic, namely the input signal during the propagation in the amplifier medium is multiplied by the avalanche effect of the stimulated emission to produce exponential growth. We perform a theoretical study motivated and supported by experimental data on a He gas amplifier driven by intense 30-fs-long laser pulses and seeded with attosecond pulse trains generated in a separated Ne gas jet. We demonstrate that the strong-field theory in the frame of high harmonic generation fully supports the appearance of the avalanche effect in the amplification of extreme ultraviolet attosecond pulse trains. We theoretically separate and identify different physical processes taking part in the interaction and we demonstrate that X-ray parametric amplification dominates over others. In particular, we identify strong-field mediated intrapulse X-ray parametric processes as decisive for amplification at the single-atom level. We confirm that the amplification takes place at photon energies where the amplifier is seeded and when the seed pulses are perfectly synchronized with the driving strong field in the amplifier. Furthermore, propagation effects, phase matching and seed synchronization can be exploited to tune the amplified spectral range within the seed bandwidth.
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© 2016 [Optical Society of America]. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.
CitationSerrat, C., Roca, D., Budesca, J., Seres, J., Seres, E., Aurand, B., Hoffmann, A., Namba, S., Kuehl, T., Spielmann, C. Avalanche of stimulated forward scattering in high harmonic generation. "Optics express", 05 Abril 2016, vol. 24, núm. 8, p. 8028-8044. 
URIhttp://hdl.handle.net/2117/86479
DOI10.1364/OE.24.008028
ISSN1094-4087
Publisher versionhttps://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-8-8028
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