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Spatial coherence measurement of a high average power table-top soft X-ray laser

Date

2001

Authors

Attwood, D. T., author
Rocca, Jorge J., author
Chang, C., author
Tomasel, F. G., author
Seminario, M., author
Lui, Yanwei, author
EDP Sciences, publisher

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Abstract

An extraordinarily high degree of spatial coherence from a high average power tabletop 46.9 nm laser was observed in two-pinhole interference experiments. Refractive anti-guiding and gain guiding along a capillary discharge-produced plasma column causes a rapid increase of the spatial coherence with amplifier length. Full spatial coherence was approached with a 36 cm long plasma of very high axial uniformity and a length to diameter ratio exceeding 1000: 1.

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