Measurement of excited-state transitions in cold calcium atoms by direct femtosecond frequency-comb spectroscopy

J. E. Stalnaker, Y. Le Coq, T. M. Fortier +3

We apply direct frequency-comb spectroscopy, in combination with precision cw spectroscopy, to measure the ${4s4p}^3{P}_1\to {4s5s}^3{S}_1$ transition frequency in cold calc…