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Publication Citation: Femtosecond frequency comb measurement of absolute frequencies and hyperfine coupling constants in cesium vapor

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Author(s): Jason Stalnaker; Vela Mbele; Vladislav Gerginov; Tara M. Fortier; Scott A. Diddams; Leo Hollberg; C E. Tanner;
Title: Femtosecond frequency comb measurement of absolute frequencies and hyperfine coupling constants in cesium vapor
Published: April 29, 2010
Abstract: We report measurements of absolute transition frequencies and hyperfine coupling constants for the 8S1/2 , 9S1/2 , 7D3/2 , and 7D5/2 states in 133 Cs vapor. The stepwise excitation through either the 6P1/2 or 6P3/2 intermediate state is performed directly with broadband laser light from a stabilized femtosecond laser optical-frequency comb. The laser beam is split, counter-propagated and focused into a room-temperature Cs vapor cell. The repetition rate of the frequency comb is scanned and we detect the fluorescence on the 7P1/2,3/2 → 6S1/2 branch of the decay of the excited states. The excitations to the different states are isolated by the introduction of narrow bandwidth interference filters in the laser beam paths. Using a nonlinear least squares method we find measurements that are in agreement with other recent measurements for the 8S state and provide a two-order of magnitude improvement over previously published results for the 9S and 7D states.
Citation: Physical Review A (Atomic, Molecular and Optical Physics)
Volume: 81
Pages: 12 pp.
Keywords: cesium;frequency measurement;optical frequency comb;atomic spectroscopy
Research Areas: Physics, Optical Technology, Optical Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (651KB)