University Of Les Illes Baleares

Mallorca, Spain

University Of Les Illes Baleares

Mallorca, Spain
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Javaloyes J.,University Of Les Illes Baleares | Marconi M.,French National Center for Scientific Research | Giudici M.,French National Center for Scientific Research
Physical Review Letters | Year: 2017

Dissipative solitons often behave as quasiparticles, and they may form molecules characterized by well-defined bond distances. We show that pointwise nonlocality may lead to a new kind of molecule where bonds are not rigid. The elements of this molecule can shift mutually one with respect to the others while remaining linked together, in a manner similar to interlaced rings in a chain. We report experimental observations of these chains of nested dissipative solitons in a time-delayed laser system. © 2017 American Physical Society.


Marconi M.,CNRS Non-Linear Institute of Nice | Javaloyes J.,University Of Les Illes Baleares | Barland S.,CNRS Non-Linear Institute of Nice | Balle S.,CSIC - Mediterranean Institute for Advanced Studies | Giudici M.,CNRS Non-Linear Institute of Nice
Nature Photonics | Year: 2015

We show that the nonlinear polarization dynamics of a vertical-cavity surface-emitting laser placed in an external cavity lead to the emission of temporal dissipative solitons. These are vectorial solitons because they appear as localized pulses in the polarized output, but leave the total intensity constant. When the cavity roundtrip time is much longer than the soliton duration, several independent solitons as well as bound states (molecules) may be hosted in the cavity. All these solitons coexist together and with the background solution. The experimental results are well described by a theoretical model that can be reduced to a single delayed equation for the polarization orientation, which allows the vectorial solitons to be interpreted as polarization kinks. A Floquet analysis is used to confirm the mutual independence of the observed solitons. © 2015 Macmillan Publishers Limited.


Marconi M.,CNRS Non-Linear Institute of Nice | Javaloyes J.,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
Physical Review Letters | Year: 2014

We investigate the relationship between passive mode locking and the formation of time-localized structures in the output intensity of a laser. We show how the mode-locked pulses transform into lasing localized structures, allowing for individual addressing and arbitrary low repetition rates. Our analysis reveals that this occurs when (i) the cavity round-trip is much larger than the slowest medium time scale, namely the gain recovery time, and (ii) the mode-locked solution coexists with the zero intensity (off) solution. These conditions enable the coexistence of a large quantity of stable solutions, each of them being characterized by a different number of pulses per round-trip and with different arrangements. Then, each mode-locked pulse becomes localized, i.e., individually addressable. © 2014 American Physical Society.


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.


Marconi M.,CNRS Non-Linear Institute of Nice | Javaloyes J.,University Of Les Illes Baleares | Barland S.,CNRS Non-Linear Institute of Nice | Giudici M.,CNRS Non-Linear Institute of Nice | Balle S.,CSIC - Mediterranean Institute for Advanced Studies
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2013

We study theoretically and experimentally the combined effects of polarization-selective optical feedback and of crossed-polarization reinjection in a vertical-cavity surface-emitting laser. We show that the application of polarization-selective optical feedback, which induces an effective dichroism in the system, allows one to generate a robust and regular square-wave output signal in each polarization component. The period of the square-wave signal is determined by twice the reinjection delay. We analyze the regularity of the induced modulation as a function of laser bias current, dichroism, and of the levels and delays of reinjection and feedback, thus revealing the robustness of the square-wave emission in the parameter space. We also show that the feedback is more effective when acting on the long-wavelength polarization mode, which can be traced to the asymmetry of the bistable region of the vertical-cavity surface-emitting lasers for low dichroism. © 2013 American Physical Society.


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.


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.


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.


Javaloyes J.,University Of Les Illes Baleares
Physical Review Letters | Year: 2016

We demonstrate the existence of stable three-dimensional dissipative localized structures in the output of a laser coupled to a distant saturable absorber. These phase invariant cavity light bullets are individually addressable and can be envisioned for three-dimensional optical information storage. An effective theory provides for an intuitive picture and allows us to relate their formation to the morphogenesis of static spatial autosolitons and temporal cellular patterns. © 2016 American Physical Society.


Javaloyes J.,University Of Les Illes Baleares | Balle S.,CSIC - Mediterranean Institute for Advanced Studies
Optics Letters | Year: 2011

The performance of two-section, passively mode-locked semiconductor lasers is theoretically analyzed for different cavity designs. Placing the saturable absorber section close to an antireflection-coated facet leads to a substantial increase in output power and a reduction in amplitude and timing jitter. Moreover, it broadens the bias current region of stable passive mode-locking operation. © 2011 Optical Society of America.

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