Fringe formation and coherence of a soft-x-ray laser beam illuminating a Mach-Zehnder interferometer

We investigated the fringe visibility produced by a Mach-Zehnder interferometer illuminated by a collisionally pumped yttrium x-ray laser operating at 15.5 nm. Fringe visibility varied as a function both of relative path delay and of relative spatial overlap of the beams. This visibility information...

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Veröffentlicht in:Optics Letters 1995-09, Vol.20 (18), p.1907-1909
Hauptverfasser: Celliers, P, Weber, F, Da Silva, L B, Barbee, Jr, T W, Cauble, R, Wan, A S, Moreno, J C
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Sprache:eng
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Zusammenfassung:We investigated the fringe visibility produced by a Mach-Zehnder interferometer illuminated by a collisionally pumped yttrium x-ray laser operating at 15.5 nm. Fringe visibility varied as a function both of relative path delay and of relative spatial overlap of the beams. This visibility information was extracted quantitatively from several interferograms and analyzed to produce a characterization of the temporal coherence, yielding a gain-narrowed linewidth of 1.3 pm for the 15.5-nm laser transition and spatial coherence consistent with an effective source size of approximately 220 microm +/- 50% at the x-ray laser output.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.20.001907