Abstract

The high-frequency recoil component is suppressed in the optical Ramsey resonance by utilizing optical pumping from the ground state to one of the magnetic sublevels of the upper state. This method requires no extra laser for suppression. With a moderate pump power and an exact tuning of the magnetic field, the high-frequency recoil component of the Ca intercombination line $^{1}$${\mathit{S}}_{0\mathrm{\ensuremath{-}}}^{3}$${\mathit{P}}_{1}$ was suppressed completely.

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