Institution: | (1) Institut Non-linéaire de Nice, UMR 6618 CNRS, Université de Nice Sophia-Antipolis, 06560 Valbonne, France;(2) Dipartimento di Scienze, Universitá dellInsubria, INFM, Via Valleggio 11, 22100 Como, Italy;(3) Dipartimento di Fisica Interateneo, Universitá e Politecnico di Bari, INFM, Via Orabona 4, 70126 Bari, Italy |
Abstract: | We analyze experimentally the spatio-temporal dynamics of the
transverse structures appearing in broad area edge-emitting
semiconductor amplifiers under CW optical injection. We
demonstrate that, in certain conditions, the light reflected by
the system exhibits a multipeaked structure whose dependence on
the parameters suggests an interpretation in terms of
cavity solitons. These structures can exhibit self-pulsations with
periods of the order of few milliseconds, which we explain in
terms of regenerative thermal oscillations. In a particular device,
we generate two single-peak structures which are spatially
uncorrelated, as required for cavity solitons. A microscopic model
shows good agreement with the main body of the experimental
results. |