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Proceedings Paper

Laser amplifier based on Raman amplification in plasma (Conference Presentation)
Author(s): Gregory Vieux; Silvia Cipiccia; Nuno R. C. Lemos; Cristian Ciocarlan; Peter A. Grant; David W. Grant; Bernhard Ersfeld; MinSup Hur; Panagiotis Lepipas; Grace Manahan; David Reboredo Gil; Anna Subiel; Gregor H. Welsh; S. Mark Wiggins; Samuel R. Yoffe; John P. Farmer; Constantin Aniculaesei; Enrico Brunetti; Xue Yang; Robert Heathcote; Gagik Nersisyan; Ciaran L. S. Lewis; Alexander Pukhov; Joāo Mendanha Dias; Dino A. Jaroszynski

Paper Abstract

The increasing demand for high laser powers is placing huge demands on current laser technology. This is now reaching a limit, and to realise the existing new areas of research promised at high intensities, new cost-effective and technically feasible ways of scaling up the laser power will be required. Plasma-based laser amplifiers may represent the required breakthrough to reach powers of tens of petawatt to exawatt, because of the fundamental advantage that amplification and compression can be realised simultaneously in a plasma medium, which is also robust and resistant to damage, unlike conventional amplifying media. Raman amplification is a promising method, where a long pump pulse transfers energy to a lower frequency, short duration counter-propagating seed pulse through resonant excitation of a plasma wave that creates a transient plasma echelon that backscatters the pump into the probe. Here we present the results of an experimental campaign conducted at the Central Laser Facility. Pump pulses with energies up to 100 J have been used to amplify sub-nanojoule seed pulses to near-joule level. An unprecedented gain of eight orders of magnitude, with a gain coefficient of 180 cm−1 has been measured, which exceeds high-power solid-state amplifying media by orders of magnitude. High gain leads to strong competing amplification from noise, which reaches similar levels to the amplified seed. The observation of 640 Jsr−1 directly backscattered from noise, implies potential overall efficiencies greater than 10%.

Paper Details

Date Published: 13 June 2017
PDF: 1 pages
Proc. SPIE 10234, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources II, 1023407 (13 June 2017); doi: 10.1117/12.2269511
Show Author Affiliations
Gregory Vieux, Univ. of Strathclyde (United Kingdom)
Institute of Physics of the ASCR, v.v.i. (Czech Republic)
ELI Beamlines (Czech Republic)
Silvia Cipiccia, Univ. of Strathclyde (United Kingdom)
Nuno R. C. Lemos, Lawrence Livermore National Lab. (United States)
Cristian Ciocarlan, Univ. of Strathclyde (United Kingdom)
Peter A. Grant, Univ. of Strathclyde (United Kingdom)
David W. Grant, Univ. of Strathclyde (United Kingdom)
Bernhard Ersfeld, Univ. of Strathclyde (United Kingdom)
MinSup Hur, Ulsan National Institute of Science and Technology (Korea, Republic of)
Panagiotis Lepipas, Univ. of Strathclyde (United Kingdom)
Grace Manahan, Univ. of Strathclyde (United Kingdom)
David Reboredo Gil, Univ. of Strathclyde (United Kingdom)
Anna Subiel, Univ. of Strathclyde (United Kingdom)
Gregor H. Welsh, Univ. of Strathclyde (United Kingdom)
S. Mark Wiggins, Univ. of Strathclyde (United Kingdom)
Samuel R. Yoffe, Univ. of Strathclyde (United Kingdom)
John P. Farmer, Heinrich-Heine-Univ. Düsseldorf (Germany)
Constantin Aniculaesei, Univ. of Strathclyde (United Kingdom)
Enrico Brunetti, Univ. of Strathclyde (United Kingdom)
Xue Yang, Univ. of Strathclyde (United Kingdom)
Robert Heathcote, STFC Rutherford Appleton Lab. (United Kingdom)
Gagik Nersisyan, Queen's Univ. Belfast (United Kingdom)
Ciaran L. S. Lewis, Queen's Univ. Belfast (United Kingdom)
Alexander Pukhov, Heinrich-Heine-Univ. Düsseldorf (Germany)
Joāo Mendanha Dias, Instituto Superior Técnico (Portugal)
Dino A. Jaroszynski, Univ. of Strathclyde (United Kingdom)


Published in SPIE Proceedings Vol. 10234:
Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources II
Dino A. Jaroszynski, Editor(s)

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