Lyapunov Potential Description for Laser Dynamics

Details Lyapunov Potential Description for Laser Dynamics Lyapunov Potential Description for Laser Dynamics

1999-05-28

arxiv.org/abs/cond-mat/9905423v1

Physics

Condensed Matter

13 pages (including 7 figures) LaTeX file. To appear in Phys Rev.A (June 1999)

Scientific paper

10.1103/PhysRevA.59.4690

We describe the dynamical behavior of both class A and class B lasers in terms of a Lyapunov potential. For class A lasers we use the potential to analyze both deterministic and stochastic dynamics. In the stochastic case it is found that the phase of the electric field drifts with time in the steady state. For class B lasers, the potential obtained is valid in the absence of noise. In this case, a general expression relating the period of the relaxation oscillations to the potential is found. We have included in this expression the terms corresponding to the gain saturation and the mean value of the spontaneously emitted power, which were not considered previously. The validity of this expression is also discussed and a semi-empirical relation giving the period of the relaxation oscillations far from the stationary state is proposed and checked against numerical simulations.

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