Measurement of absolute frequencies and hyperfine structure constants of4D5/2and4D3/2levels ofRb87andRb85using an optical frequency comb

Abstract

We report the absolute frequency values of all (ten) hyperfine transitions of $5{P}_{3/2}\ensuremath{-}4{D}_{5/2}$ and $5{P}_{3/2}\ensuremath{-}4{D}_{3/2}$ for $^{87}\mathrm{Rb}$ and $^{85}\mathrm{Rb}$ atoms via the use of an optical frequency comb by measuring the frequency of a laser diode stabilized onto the line centers of the double-resonance optical pumping spectra. Here we report on the absolute frequencies for the two transitions $[{}^{85}\mathrm{Rb},\phantom{\rule{0.16em}{0ex}}5{P}_{3/2}({F}^{\ensuremath{'}}=4)\ensuremath{-}4{D}_{5/2}\phantom{\rule{0.16em}{0ex}}({F}^{\ensuremath{'}\ensuremath{'}}=3,4)]$. Furthermore, the frequency uncertainties are reduced significantly for the other transitions. Moreover, the magnetic dipole and the electric quadrupole hyperfine structure constants of $4{D}_{5/2}$ for $^{87}\mathrm{Rb}$ and $^{85}\mathrm{Rb}$ are determined by using the measured values of the absolute frequency.