Dynamic analysis and continuous control of semiconductor lasers

TL;DR

This paper investigates the complex nonlinear dynamics of external cavity semiconductor lasers using chaos physics methods, analyzing stability through bifurcation diagrams and Lyapunov spectra, and proposing a method to create stable operating domains.

Contribution

It introduces a novel approach to stabilize ECSLs by dynamically controlling the pumping current based on chaos analysis techniques.

Findings

Electric field oscillates periodically or chaotically.

Rich nonlinear behaviors including bifurcations and quasi-periodicity.

Proposed method effectively creates stable laser operation domains.

Abstract

Stability control in laser is still an emerging field of research. In this paper the dynamics of External cavity semiconductor lasers (ECSLs) is widely studied applying the methods of chaos physics. The stability is analyzed through plotting the Lyapunov exponent spectra, bifurcation diagrams and time series. The oscillation of the electric field E has been reported to be either periodic (P1,P2,..) or chaotic. The results of the study show that the rich nonlinear dynamics of the electric field |E|^2 includes saddle node bifurcations, quasi-periodicity and regular pulse packages. The issue of finding the conditions for creating stable domains has been studied. By considering the dynamical pumping current system coupled with laser, a method for the creation of the stable domain has been introduced.