An inverted crossover resonance aiding laser cooling of171 yb

  title={An inverted crossover resonance aiding laser cooling of171 yb},
  author={John J. McFerran},
  journal={Journal of The Optical Society of America B-optical Physics},
  • J. McFerran
  • Published 3 March 2016
  • Physics
  • Journal of The Optical Society of America B-optical Physics
We observe an inverted crossover resonance in π-driven four-level systems, where F′−F=0,+1. The signal is observed through saturated absorption spectroscopy of the (6s2)S01−(6s6p)P13 transition in Yb171, where the nuclear spin I=1/2. The enhanced absorption signal is used to generate a dispersive curve for 556 nm laser frequency stabilization and the stabilized light cools Yb171 atoms in a two-stage magneto-optical trap, achieving temperatures of 20 μK. The Doppler-free spectroscopy scheme is… 

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