DYNAMIC CONTROL OF MICROMASER AND LASER-EMISSION FROM DRIVEN 3-LEVEL ATOMS

The master equations for the field in the micromaser and laser operati ng on three-level atoms driven by an external coherent field are prese nted, and exact solutions for the steady-state photon distributions ar e derived. We focus mainly on V-type atoms and study both the transien t and steady-state behavior of the mean photon number and photon numbe r fluctuations of the cavity field. It is shown that the external fiel d enables us to control the photon statistics and to realize an optica l NOT gate. In particular, we can enhance and suppress the maser and l aser radiation and its intensity noise via mechanisms such as the dyna mic Stark shift and lasing without inversion. An experimental scheme i s suggested.