engleski

Amplitude and phase control of direct frequency comb spectroscopy by atomic filter

Frequency comb may be virtually seen in the direct observation of the velocity selective optical pumping of the rubidium ground state hyperfine levels induced by a train of femtosecond pulses. The accumulation effects can be easily observed by using a weak cw scanning probe laser transmitted collinearly with the femtosecond laser centered on the D2 or D1 resonance lines. Experiments with Doppler broadened rubidium hyperfine lines illuminated by the femtosecond laser beam modified by another atomic filter (Rb vapor filled sapphire cell) will be presented and discussed.

frequency comb spectroscopy; rubidium

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