Table-top interferometry on extreme time and wavelength scales

Extreme ultraviolet Attosecond Autocorrelator
DOI: 10.1364/oe.446563 Publication Date: 2021-11-10T12:30:46Z
ABSTRACT
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 quasi amplitude splitting mode is presented. The works under grazing incidence angle broad (10 nm - 1 μm) providing collinear propagation of both pulse replicas thus constant phase difference across beam profile. compact instrument allows for XUV autocorrelation measurements time domain with single-digit attosecond precision useful scan length about ps enabling decent resolution E/ΔE = 2000 at 26.6 eV. Its performance selected spectroscopic applications requiring moderate short wavelengths demonstrated by characterizing sharp electronic transition eV Ar gas. absorption 11th harmonic frequency-doubled Yb-fiber laser leads to well-known 3s3p64p1P1 Fano resonance atoms. We benchmark our time-domain interferometry results high-resolution grating spectrometer find an excellent agreement. common-path interferometer opens up new opportunities short-wavelength femtosecond on scales various research fields.
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