We derive a novel expression for the mutual-coherence function for plasma x-ray lasers using generalized matrix optics. The expression is valid when optical systems can be described by complex <i>ABCDGH</i> beam matrices and when gain saturation can be ignored. The model is used to analyze the output-beam characteristics and the spatial-coherence properties of a general class of x-ray lasers that contain exploding-foil, slab, and curved targets. Comparison of our results with numerical solutions of the paraxial wave equation and previous experimental data shows good agreement.
© 1999 Optical Society of America
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(080.2730) Geometric optics : Matrix methods in paraxial optics
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
Jun Yang, Dianyuan Fan, Shiji Wang, and Yuan Gu, "Generalized matrix-optics description of soft-x-ray lasers," J. Opt. Soc. Am. B 16, 1016-1024 (1999)