Dynamics Maps and Scenario Transitions for a Semiconductor Laser Subject to Dual-Beam Optical Injection

Compared with single-beam injection, dual-beam optical injection increases the complexity and enriches the nonlinear dynamics of a semiconductor laser. The nonlinear dynamics of a dual-beam optically injected semiconductor laser system under various operating conditions are numerically studied by comprehensive comparisons of the output spectra of single-beam injection and dual-beam injection. Complete mapping of the different scenarios induced by dual-beam optical injection is shown for various combinations of detuning frequencies and injection strengths of the two injection beams. Complex dual-beam injection dynamics are mapped, and the dynamics in different scenarios are linked through transitional regions. Characteristics of the transition from one scenario to another are traced and analyzed by comparing the resonance frequency of each dual-beam injection optical spectrum with that of the dominant single-beam injection optical spectrum. Two different types of chaos, each following a period-doubling route, are identified in two different scenarios.