In situ characterization of few-cycle laser pulses in transient absorption spectroscopy.

  title={In situ characterization of few-cycle laser pulses in transient absorption spectroscopy.},
  author={Alexander Bl{\"a}ttermann and Christian D. Ott and Andreas Kaldun and Thomas Ding and Veit Stoo{\ss} and Martin Laux and Marc Rebholz and Thomas Pfeifer},
  journal={Optics letters},
  volume={40 15},
Attosecond transient absorption spectroscopy has thus far been lacking the capability to simultaneously characterize the intense laser pulses at work within a time-resolved quantum-dynamics experiment. However, precise knowledge of these pulses is key to extracting quantitative information in strong-field highly nonlinear light-matter interactions. Here, we introduce and experimentally demonstrate an ultrafast metrology tool based on the time-delay-dependent phase shift imprinted on a strong… 

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