Absolute frequency measurement of rubidium 5S-7S two-photon transitions with a femtosecond laser comb.
The absolute frequencies of rubidium 5S-7S 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 5S-7S 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 7S1/2 state is improved by a factor of 5 in comparison with previous results.
Chui
Hsiang-Chen
HC
Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan. hcchui@itri.org.tw
Ko
Ming-Sheng
MS
Liu
Yi-Wei
YW
Shy
Jow-Tsong
JT
Peng
Jin-Long
JL
Ahn
Hyeyoung
H