Journal
OPTICS EXPRESS
Volume 29, Issue 24, Pages 40333-40344Publisher
Optica Publishing Group
DOI: 10.1364/OE.446563
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Funding
- Fraunhofer Cluster of Excellence Advanced Photon Sources (CAPS)
- Innovation Pool of the Research Field Matter of the Helmholtz Association (ECRAPS)
- Deutsche Forschungsgemeinschaft through the Cluster of Excellence 'Advanced Imaging of Matter' [EXC 2056, 390715994]
- Collaborative research center 'Light-induced Dynamics and Control of Correlated Quantum Systems' [SFB-925, 170620586, KI 482/20-1, LA 1431/5-1]
- Bundesministerium fur Bildung und Forschung (BMBA) [13N12082]
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This contribution presents a high-precision XUV pulse autocorrelator for short-pulse metrology and dynamic studies, demonstrating its performance in characterizing electronic transitions in argon gas. The results are compared with a high-resolution XUV grating spectrometer, showing excellent agreement and opening up new opportunities for femtosecond and attosecond pulse metrology and dynamic studies in various research fields.
Short-pulse metrology and dynamic studies in the extreme ultraviolet (XUV) spectral range greatly benefit from interferometric measurements. In this contribution a Michelson-type all-reflective split-and-delay autocorrelator operating in a quasi amplitude splitting mode is presented. The autocorrelator works under a grazing incidence angle in a broad spectral range (10 nm - 1 mu m) providing collinear propagation of both pulse replicas and thus a constant phase difference across the beam profile. The compact instrument allows for XUV pulse autocorrelation measurements in the time domain with a single-digit attosecond precision and a useful scan length of about 1 ps enabling a decent resolution of E/Delta E = 2000 at 26.6 eV. Its performance for selected spectroscopic applications requiring moderate resolution at short wavelengths is demonstrated by characterizing a sharp electronic transition at 26.6 eV in Ar gas. The absorption of the 11th harmonic of a frequency-doubled Yb-fiber laser leads to the well-known 3s3p64p1P1 Fano resonance of Ar atoms. We benchmark our time-domain interferometry results with a high-resolution XUV grating spectrometer and find an excellent agreement. The common-path interferometer opens up new opportunities for short-wavelength femtosecond and attosecond pulse metrology and dynamic studies on extreme time scales in various research fields.
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