Coexisting attractors in a laser with an injected signal

Some general dynamical properties of a homogeneously broadened ring laser driven by an external coherent signal are explored. By combining the information obtained from time-dependent solutions, their power spectra, Poincare surface of sections, and Liapunov exponents, detailed evidence is provided of the bifurcation structure of a laser with injected signal under high-gain conditions and the existence of up to three basins of attraction for the same range of operating parameters is shown. The behavior of this system for experimentally accessible ranges of the gain is also discussed and evidence for the persistence of a number of interesting pulsation phenomena is provided.