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Constantin Aniculaesei
초강력 레이저과학 연구단
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An ultra-high gain and efficient amplifier based on Raman amplification in plasma

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Title
An ultra-high gain and efficient amplifier based on Raman amplification in plasma
Author(s)
Vieux, G; Cipiccia, S; Grant, DW; Lemos, N; Grant, P; Ciocarlan, C; Ersfeld, B; Hur, MS; Lepipas, P; Manahan, GG; Raj, G; Gil, DR; Subiel, A; Welsh, GH; Wiggins, SM; Yoffe, SR; Farmer, JP; C. Aniculaesei; Brunetti, E; Yang, X; Heathcote, R; Nersisyan, G; Lewis, CLS; Pukhov, A; Dias, JM; Jaroszynski, DA
Publication Date
2017-05
Journal
SCIENTIFIC REPORTS, v.7, no., pp.2399 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Raman amplification arising from the excitation of a density echelon in plasma could lead to amplifiers that significantly exceed current power limits of conventional laser media. Here we show that 1-100 J pump pulses can amplify picojoule seed pulses to nearly joule level. The extremely high gain also leads to significant amplification of backscattered radiation from "noise", arising from stochastic plasma fluctuations that competes with externally injected seed pulses, which are amplified to similar levels at the highest pump energies. The pump energy is scattered into the seed at an oblique angle with 14 J sr(-1), and net gains of more than eight orders of magnitude. The maximum gain coefficient, of 180 cm(-1), exceeds high-power solid-state amplifying media by orders of magnitude. The observation of a minimum of 640 J sr(-1) directly backscattered from noise, corresponding to approximate to 10% of the pump energy in the observation solid angle, implies potential overall efficiencies greater than 10%. © The Author(s) 2017
URI
http://pr.ibs.re.kr/handle/8788114/3626
DOI
10.1038/s41598-017-01783-4
ISSN
2045-2322
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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