7th International Conference on X-Ray Lasers
J. Phys. IV France 11 (2001) Pr2-123-Pr2-126
DOI: 10.1051/jp4:2001224
Spatial coherence measurement of a high average power table-top soft X-ray laser
Yanwei Liu1, 2, M. Seminario3, F.G. Tomasel3, C. Chang4, 2, J.J. Rocca3 and D.T. Attwood1, 4, 21 Applied Science and Technology Graduate Program, University of California at Berkeley, U.S.A.
2 Center for X-ray Optics, Lawrence Berkeley National Laboratory, U.S.A.
3 Department of Electrical and Computer Engineering, Colorado State University, U.S.A.
4 Department of Electrical Engineering and Computer Science, University of California at Berkeley, U.S.A.
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.
© EDP Sciences 2001