Precision spectroscopy with a single 40Ca+ ion in a Paul trap*
Guan Huaa),b), Huang Yaoa),b), Liu Pei-Lianga),b), Bian Wua),b),c), Shao Hua),b),c), Gao Ke-Lina),b)†
       
(a) Measured AOM offset frequency Δ f ( i ); (b) measured probe laser frequency f c( i ) using the comb referenced to the H-maser; (c) frequency of the clock transition ν 0( i ) calculated from Δ f ( i ) and f c( i ); (d) histogram of the ν 0( i ) with a Gaussian fitting.