We have measured the absolute frequency of the excited state transition in a atom with a femtosecond frequency comb, utilizing the recently developed spectroscopic technique of the double resonance optical pumping method. The absolute energy level of the state is determined by measuring the absolute frequency of the transition simultaneously. The hyperfine structure constants of the state are obtained by using the measured frequency. The magnetic dipole constant, A, is determined to be with an uncertainty reduced 60-fold compared with a previous result. The electric quadrupole constant, B, is determined, for what is to our knowledge the first time, to be .
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CorrectionsWon-Kyu Lee, Han Seb Moon, and Ho Suhng Suh, "Measurement of the absolute energy level and hyperfine structure of the 87Rb 4D5/2 state: erratum," Opt. Lett. 40, 2111-2111 (2015)