Toward compact and ultra-intense laser-based soft x-ray lasers

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Title
Toward compact and ultra-intense laser-based soft x-ray lasers
Author(s)
S Sebban; A Depresseux; E Oliva; J Gautier; F Tissandier; J Nejdl; M Kozlova; G Maynard; J P Goddet; A Tafzi; A Lifschitz; Hyung Taek Kim; S Jacquemot; P Rousseau; P Zeitoun; A Rousse
Publication Date
2018-01
Journal
PLASMA PHYSICS AND CONTROLLED FUSION, v.60, no.1, pp.014030 -
Publisher
IOP PUBLISHING LTD
Abstract
We report here recent work on an optical field ionized (OFI), high-order harmonic-seeded EUV laser. The amplifying medium is a plasma of nickel-like krypton obtained by OFI when focusing a 1 J, 30 fs, circularly-polarized, infrared pulse into a krypton-filled gas cell or krypton gas jet. The lasing transition is the 3d(9)4d (J = 0) -> 3d(9)4p (J = 1) transition of Ni-like krypton ions at 32.8 nm and is pumped by collisions with hot electrons. The gain dynamics was probed by seeding the amplifier with a high-order harmonic pulse at different delays. The gain duration monotonically decreased from 7 ps to an unprecedented shortness of 450 fs full width at half-maximum as the amplification peak rose from 150 to 1200 with an increase of the plasma density from 3 x 10(18) to 1.2 x 10(20) cm(-3). The integrated energy of the EUV laser pulse was also measured, and found to be around 2 mu J. It is to be noted that in the ASE mode, longer amplifiers were achieved (up to 2 cm), yielding EUV outputs up to 14 mu J. © 2017 IOP Publishing Ltd Printed in the UK
URI
https://pr.ibs.re.kr/handle/8788114/4039
ISSN
0741-3335
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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