Femtosecond laser pulse train effect on Doppler profile of cesium
resonance lines |
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Authors: | N Vuji?i? S Vdovi? D Aumiler T Ban H Skenderovi? G Pichler |
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Institution: | (1) Institute of Physics, Bijenička 46, 10000 Zagreb, Croatia |
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Abstract: | We present direct observation of the velocity-selective optical pumping of
the Cs ground state hyperfine levels induced by the femtosecond (fs) laser
oscillator centered at either D2 (6 2S1/2↦6 2P3/2,
852 nm) or D1 (6
P1/2, 894 nm) cesium
line. We utilized previously developed modified direct frequency comb
spectroscopy (DFCS) which uses a fixed frequency comb for the excitation and
a weak cw scanning probe laser centered at the 133Cs 6
2S1/2↦6 2P3/2 transition (D2 line) for ground
levels population monitoring. The frequency comb excitation changes the
usual Doppler absorption profile into a specific periodic, comblike
structure. The mechanism of the velocity selective population transfer
between the Cs ground state hyperfine levels induced by fs pulse train
excitation is verified in a theoretical treatment of the multilevel atomic
system subjected to a pulse train resonant field interaction. |
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Keywords: | 32 80 Qk Coherent control of atomic interactions with photons 42 50 Gy Effects of atomic coherence on propagation absorption and amplification of light electromagnetically induced transparency and absorption |
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