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Optically induced spin echoes are observed. Two types of spin echoes, on- and off-resonant manipulations by the control pulse, are discussed. Possibility of spin rotation around arbitrary axis by using the off-resonant manipulation is given.
Propagation of optical pulses for the Rb D1 transition is studied. Negative delay was observed for large absorption, and deviation from the conventional group velocity domega/dk is investigated
Summary form only given. To understand the fundamental properties of an atom, precise measurement of the atomic resonance frequency is important. The main factor that restricts the precision is the spectral broadening. Spectral narrowing by recurrent use of free decay signal in magnetic resonance was proposed and demonstrated in the ground state of Rb atoms. In the present report we apply this technique...
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