Abstract
A newly-developed normal mode model of laser dynamics in a generalised array of waveguides is applied to extend the spin-flip model (SFM) to pairs of evanescently-coupled spin-VCSELS. The effect of high birefringence is explored, revealing new dynamics and regions of bistability. It is shown that optical switching of the polarisation states of the lasers may be controlled through the optical pump and that, under certain conditions, the polarisation of one laser may be switched by controlling the intensity and polarisation in the other.
Highlights
R ECENT years have seen a growth of research interest in the nonlinear dynamics of arrays of vertical cavity surface-emitting lasers (VCSELs) and in potential applications of these effects
In the present contribution we explore some of the dynamics predicted for coupled pairs of spin-VCSELs based on a newly-developed theoretical treatment [17] that extends the spin-flip model (SFM) to apply to VCSEL arrays
1) Switching Both Lasers Together on Pump Power: We have examined the dynamics within the bistable regions via time series solutions of the rate equations using the Runge Kutta method
Summary
R ECENT years have seen a growth of research interest in the nonlinear dynamics of arrays of vertical cavity surface-emitting lasers (VCSELs) and in potential applications of these effects. Conventional CMT describes only the amplitude and phase of the electric field of the photons and the total concentration of the electrons Whilst this is adequate for modelling many phenomena occurring in laser arrays, it cannot be adapted to include the effects of optical polarisation or electron spin that are often relevant in vertical cavity lasers. For this purpose, the spin flip model (SFM) [12] is well-established as the method of choice, and has been successfully extended to model mutually coupled VCSELs by adding delayed optical injection terms [13].
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