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Proceedings Paper

Focusability of a capillary discharge-pumped soft x-ray laser beam
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Paper Abstract

Soft x-ray lasers have become practical light sources for applications such as interferometric diagnosis of plasmas, the measurement of optical constants, and the characterization of EUV optics. For many potential applications involving light-matter interaction and nonlinear physics, the achievable light intensity is a critical parameter. High intensity could be realized by focusing high pulse energy light with good beam quality. Recent progress at Colorado State University has realized milli-joule level pulse energy at 46.9 nm from a capillary discharge-pumped tabletop soft x-ray laser. Direct measurements of the spatial coherence of the laser beam using a two-pinhole interference method have shown very high spatial coherence of the beam. These results imply the possibility of achieving very high intensity in the soft x-ray region. In this paper we report the results of a focusing experiment conducted with the laser mentioned above and designed to measure the focusability of the beam. The spatial profile of the focused beam is measured with knife-edge scanning technique and characterized with an M-squared factor. The results suggest that 1013 W/cm2 intensity is achievable with modestly tight focusing.

Paper Details

Date Published: 12 December 2001
PDF: 6 pages
Proc. SPIE 4505, Soft X-Ray Lasers and Applications IV, (12 December 2001); doi: 10.1117/12.450601
Show Author Affiliations
Yanwei Liu, Univ. of California/Berkeley and Lawrence Berkeley National Lab. (United States)
Jared Caffey, Colorado State Univ. (United States)
Igor Artioukov, P.N. Lebedev Physical Institute (Russia)
Alexander V. Vinogradov, P.N. Lebedev Physical Institute (Russia)
Jorge J. G. Rocca, Colorado State Univ. (United States)
David T. Attwood, Univ. of California/Berkeley and Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 4505:
Soft X-Ray Lasers and Applications IV
Ernst E. Fill; Jorge J. G. Rocca, Editor(s)

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