The behavior of a three-level laser in the steady-state regime

John Carroll Ryan

Babak Parvin

Ramon A. Vilaseca, Germán J. de Valcárcel, V. Espinosa +1 more

The behavior of a cascade laser in which two fields are simultaneously amplified is theoretically investigated. Each field is coupled with one of the transitions of a ladder three- level atomic or molecular system in conditions of homogeneous broadening. Steady-state as well as dynamic solutions are considered. Cooperative emission of both fields is found in steady state regime. Single-field solutions can loose stability through two different types of Hopf bifurcations. One of them can appear below the Lorenz-Haken second laser threshold, and the `bad cavity' condition is not necessarily required. In the unstable regimes transitions to chaos via the quasiperiodicity road are found. The influence of cavity detuning and the passage from cascade to two-photon laser are considered.

Donna Maree Sheppard

Shangqing Gong

We, using a nonlinear theory of laser physics, investigate for a simple three-level atomic system the steady-state intensity behavior due to the effects of quantum coherence and decoherence. We find that the steady-state intensity of the laser field can arrive at a maximal value for a certain Rabi frequency of the driving field. We also find that the linear gain and the laser intensity tend to decrease for the linewidth of the driving field.

Babak Parvin