Persistent properties of period doubling in directly modulated semiconductor lasers

Abstract

In this paper the inherent properties of period-doubling behavior in deeply modulated laser diodes were investigated. The thresholds for the period doubling in terms of the controlling parameters were indicated. With the consideration of Langevin noise in the single-mode rate equations, it was indicated that the noise acted as a virtual Hopf precursor for the event of period doubling. The linewidth and frequency shifting of the noise bump were predicted by Floquet multipliers. Finally, a comparison of the noise bumps obtained from the simulated and analytic methods was also presented.