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
Journal Title
Journal ISSN
Volume Title
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.