Abstract
The absolute frequencies of rubidium two-photon transitions at 760 nm are measured to an accuracy of 20 kHz with an optical frequency comb based on a mode-locked femtosecond Ti:sapphire laser. The rubidium two-photon transitions are potential candidates for frequency standards and serve as important optical frequency standards for telecommunication applications. The accuracy of the hyperfine constant of the state is improved by a factor of 5 in comparison with previous results.
© 2005 Optical Society of America
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