Mapping of the Optical Frequency Comb to the Atom Velocity Comb
A mode-locked fs laser is used to map the laser frequency comb into the velocity comb of the excited Rb atoms at room temperature. Upon resonant excitation by discrete optical frequencies the velocity distribution of the excited Rb atoms shows comb-like structure. Simultaneously, velocity selective population transfer occurs between ground state hyperfine levels. Both facts are observed by modified direct frequency comb spectroscopy and verified by detailed density matrix treatment of the multilevel system in resonant field.
KeywordsFrequency Comb Optical Frequency Comb Hyperfine Level Ultra Cold Atom Absorption Line Profile
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