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Stability control in laser is still an emerging field of research. In thispaper the dynamics of External cavity semiconductor lasers (ECSLs) is widelystudied applying the methods of chaos physics. The stability is analyzedthrough plotting the Lyapunov exponent spectra, bifurcation diagrams and timeseries. The oscillation of the electric field E has been reported to be eitherperiodic (P1,P2,..) or chaotic. The results of the study show that the richnonlinear dynamics of the electric field |E|^2 includes saddle nodebifurcations, quasi-periodicity and regular pulse packages. The issue offinding the conditions for creating stable domains has been studied. Byconsidering the dynamical pumping current system coupled with laser, a methodfor the creation of the stable domain has been introduced.

Dynamic analysis and continuous control of semiconductor lasers