Marc Sciamanna
Supélec,
Laboratoire Matériaux Optiques, Photonique et Systèmes,
CNRS - UMR 7132,
Dynamical diversity in
VCSELs with optical injection
We report on the dynamics of the
polarization modes and high order transverse modes that occur when
VCSELs are
subject to optical injection. Several dynamical scenarios shall be
discussed
and compared to those typically encountered in conventional laser
problems
using edge-emitting lasers. In particular the two polarization mode
competition
that typically underlies VCSEL light emission induces new
injection-locking
steady states and modifies the bifurcation that delimits the injection
locking
boundaries. Depending on the injection strength and master-slave
frequency detuning,
polarization switching and transverse mode switching can be observed
and
accompanied by dynamical instabilities (period doubling, chaos etc.).
Theoretical analysis based on continuation of VCSEL models will be
compared
with experimental observations. Finally we shall report on the
influence of
polarization mode competition on the synchronization of
unidirectionally
coupled VCSELs and its use for chaos secure communication systems.