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 |
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Format: | Artikel |
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. |
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ISSN: | 0146-9592 1539-4794 |
DOI: | 10.1364/OL.20.001907 |