vuv frequency-comb spectroscopy of atomic xenon
Akira Ozawa and Yohei Kobayashi
Accepted
Direct frequency comb spectroscopy of a single photon transition (5p6-5p56s) in 132Xe is performed with a vacuum ultraviolet (vuv) frequency comb at 147 nm. The vuv comb is generated from an Yb-doped fiber laser system at a repetition rate of ~ 79 MHz via high harmonic generation (HHG) in a Kr gas jet placed at the focus point of an external enhancement cavity. For Doppler-reduced spectroscopy, a collimated atomic beam of isotope-selected 132Xe is used as a target. Repeated measurements with different repetition frequencies and highly sensitive time-resolved detection allow us to determine the absolute transition frequency with an uncertainty of 140 MHz in vuv region.