We apply an optimal control technique (OCT) to design a secondary coupling pulse that can control the amplification of a given primary optical pulse in a dense media of coherently prepared three-level λ-type atoms without population inversion. Effects of pulse absorption, amplification, and reshaping by the medium are incorporated in the OCT. We demonstrate numerically that shape-invariant as well as shape-distorted amplification without population inversion can be achieved by properly designing the shape of the coupling pulse. The maximum amplification obtainable is shown to be dependent on the initial atomic coherence as well as the upper bound of the coupling pulse intensity. The group velocity of the primary pulse can also be controlled by the coupling pulse.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - 1996|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics