The degree of spatial coherence in the direction perpendicular to the target surface is reported for a transient nickellike silver x-ray laser at 13.9 nm. An x-ray laser plasma column was produced by irradiating a slab silver target with a single shaped picosecond laser pulse with energy less than 3 J. Young’s double-slit method was applied to measure the fringe visibility as a function of the slit separation for different target lengths. The diameter of the equivalent incoherent source and the coherence radius of the output radiation were determined as well.
© 2004 Optical Society of America
(030.1640) Coherence and statistical optics : Coherence
(030.1670) Coherence and statistical optics : Coherent optical effects
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(340.7450) X-ray optics : X-ray interferometry
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)
A. Lucianetti, K. A. Janulewicz, R. Kroemer, G. Priebe, J. Tümmler, W. Sandner, P. V. Nickles, and V. I. Redkorechev, "Transverse spatial coherence of a transient nickellike silver soft-x-ray laser pumped by a single picosecond laser pulse," Opt. Lett. 29, 881-883 (2004)