A novel method for controlling chaos in external cavity semiconductor laser

In this paper, at first the stability of the dynamics of semiconductor laser is analyzed through the Lyapunov exponent spectra, bifurcation diagrams and time series of electric field intensity. The analysis is performed with respect to applied feedback phase (C-p) and feedback strength (eta) of the laser. Then the dynamical chaos control method introduced by Behnia and Akhshani (2009) [26] is used for controlling dynamical behavior of an External Cavity Semiconductor Laser (ECSL). A great virtue of this method is its flexibility. Also, unlike other chaos control techniques, in this method not need to know more than one variable. In this paper, by considering a chaotic dynamical system as a pump current source, the ECSL is stabilized properly. Furthermore, the proposed method is used to design a simple circuit as a controller. (C) 2012 Elsevier GmbH. All rights reserved.