Entity

Time filter

Source Type


Javaloyes J.,University Of Les Illes Baleares | Marconi M.,CNRS Non-Linear Institute of Nice | Giudici M.,CNRS Non-Linear Institute of Nice
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2014

We study theoretically the nonlinear polarization dynamics of vertical-cavity surface-emitting lasers in the presence of an external cavity providing delayed optical feedback and cross-polarized reinjection. We show that, far from the laser threshold, the dynamics remains confined close to the equatorial plane of a Poincaré sphere with a fixed radius. It entails that the evolution of the system is described by two phase variables: the orientation phase of the quasilinear polarization and the optical phase of the field. We explore the complex modal structure given by the double reinjection configuration and how it evolves between the cases of single cross-polarized reinjection and single optical feedback, hence disclosing the relationship with the Lang-Kobayashi model. We also reinterpret the square-wave switching observed by J. Mulet et al. [Phys. Rev. A 76, 043801 (2007)PLRAAN1050-294710.1103/ PhysRevA.76.043801] in terms of phase kinks. © 2014 American Physical Society. Source


Javaloyes J.,University Of Les Illes Baleares | Camelin P.,CNRS Non-Linear Institute of Nice | Marconi M.,CNRS Non-Linear Institute of Nice | Giudici M.,CNRS Non-Linear Institute of Nice
Physical Review Letters | Year: 2016

A great variety of nonlinear dissipative systems are known to host structures having a correlation range much shorter than the size of the system. The dynamics of these localized structures (LSs) has been investigated so far in situations featuring parity symmetry. In this Letter we extend this analysis to systems lacking this property. We show that the LS drifting speed in a parameter varying landscape is not simply proportional to the parameter gradient, as found in parity preserving situations. The symmetry breaking implies a new contribution to the velocity field which is a function of the parameter value, thus leading to a new paradigm for LSs manipulation. We illustrate this general concept by studying the trajectories of the LSs found in a passively mode-locked laser operated in the localization regime. Moreover, the lack of parity affects significantly LSs interactions which are governed by asymmetrical repulsive forces. © 2016 American Physical Society. Source


Javaloyes J.,University Of Les Illes Baleares | Balle S.,University of the Balearic Islands
IEEE Journal of Quantum Electronics | Year: 2011

All-optical directional switching of bistable semiconductor ring lasers is studied by numerical simulations of a traveling-wave model. We discuss how the reversal depends on the bias current applied to the laser as well as on the energy, duration, and wavelength of the trigger pulses. For pulse durations longer than the cavity roundtrip time, the reversal occurs smoothly with a transient that exhibits relaxation oscillations, otherwise, the transient is composed of large long-lived spikes that reveal its multimode character. In the former case, the switching speed can be defined like in electronics systems, but not in the latter, which requires an operational definition of the maximum speed based on, e.g., bit-error rate measurements. Our model includes the light extraction sections present in real devices, which allows us to discuss the experimental problems posed by the differences existing between intracavity fields and output fields. © 2011 IEEE. Source


Marconi M.,CNRS Non-Linear Institute of Nice | Javaloyes J.,University Of Les Illes Baleares | Balle S.,CSIC - Mediterranean Institute for Advanced Studies | Giudici M.,CNRS Non-Linear Institute of Nice
IEEE Journal on Selected Topics in Quantum Electronics | Year: 2014

We show experimentally and theoretically that an electrically biased 200μm multitransverse mode vertical-cavity surface-emitting laser can be passively mode-locked using optical feedback from a distant resonant saturable absorber mirror. This is achieved when one cavity is placed at the Fourier plane of the other. Such nonconventional optical feedback leads to the formation of two tilted plane waves traveling in the external cavity with opposite transverse components and alternating in time at every round-trip. Each of these plane waves gives birth to a train of mode-locked pulses separated by twice the external cavity round-trip, while the two trains are time shifted by a round-trip. A large portion of the transverse section of the device contributes to mode-locked emission leading to pulses of approximately 1-W peak power and 10-ps width. We discuss how inhomogeneities in the transverse section of the saturable absorber select the emitted tilted waves, thus leading to tunable emission over 4 nm. © 2014 IEEE. Source


Javaloyes J.,University Of Les Illes Baleares | Ackemann T.,University of Strathclyde | Hurtado A.,University of Strathclyde
Physical Review Letters | Year: 2015

Motionless domain walls representing connecting temporal or spatial orbits typically exist only for very specific parameters, around the so-called Maxwell point. This report introduces a novel mechanism for stabilizing temporal domain walls away from this peculiar equilibrium, opening up new possibilities to encode information in dynamical systems. It is based on antiperiodic regimes in a delayed system close to a bistable situation, leading to a cancellation of the average drift velocity. The results are demonstrated in a normal form model and experimentally in a laser with optical injection and delayed feedback. © 2015 American Physical Society. Source

Discover hidden collaborations