Stability Properties of Correlated Emission Lasers

A numerical investigation of a homogeneously-broadened, three-level correlated emission laser (CEL) is performed. Analysis revealed that its stability properties do not differ significantly from those of a similar laser without correlated emission. Transitions to chaos similar to those accompanying the Haken-Lorenz instability and at similar threshold powers are also found. A second CEL model based on the experimental observation of reduced phase diffusion noise in a HeNe Zeeman laser is also examined. Results demonstrate that the presence of correlated emission introduces a time-dependence in the laser output that would not otherwise be present. However, transitions to chaos are shown to occur under similar operating conditions to a laser without correlated emission. These two properties do not impose any practical limitations on the operating levels of CELs in interferometers whose sensitivity is expected to increase with increasing laser power.