In this contribution we describe recent results on the generation and control of temporal localiz... more In this contribution we describe recent results on the generation and control of temporal localized structures in a passively mode-locked Vertical-Cavity Surface-Emitting Laser mounted in an external cavity closed by a resonant saturable absorber mirror. When the cavity roundtrip is much larger than the medium timescales, this system exhibits a temporal aspect-ratio large enough to host pulses which can be individually addressed. These localized pulses have been proposed as information bits and the possibility of their manipulation opens interesting perspectives for information processing. We will show that a modulation of the pumping current leads to control the position and the speed of the localized pulses within the cavity. In addition to pin the pulses at well-defined positions, which enables clocking the bit flow, the pulses can be driven to collide one against the other, thus unveiling the purely repulsive mutual interaction.
Quantum and Semiclassical Optics: Journal of the European Optical Society Part B, 1998
It is shown that the polarization ellipticity of light emitted by a VCSEL, which is optically pum... more It is shown that the polarization ellipticity of light emitted by a VCSEL, which is optically pumped with circularly polarized light, depends significantly on the strength of the transverse magnetic field. This dependence can be used for a precise determination of the electron ...
2011 Numerical Simulation of Optoelectronic Devices, 2011
We present a general method allowing to perform a direct bifurcation diagram and to determine the... more We present a general method allowing to perform a direct bifurcation diagram and to determine the stability of the solutions of a Traveling wave model. We exemplify the cases of the two level atom and the semiconductor quantum well lasers. I. INTRODUCTION The Maxwell-Bloch equations governing the laser dynamics can be regarded as a singularly perturbed problem: the fast re-
... Permissions & Reprints. Full length article. Mode competition in a Fabry-Perot se... more ... Permissions & Reprints. Full length article. Mode competition in a Fabry-Perot semiconductor laser: travelling wave model with asymmetric dynamical gain. M. Homar, S. Balle b , a and M. San Miguel b , a. ... Pll S00304018(96)002349 M. Homar et al. ...
The noise properties of non-degenerate parametric amplifiers with absorption losses which are dif... more The noise properties of non-degenerate parametric amplifiers with absorption losses which are different for the two beams are analysed by means of a semiclassical approach which enables the direct derivation of the Langevin equations for the optical fields from the quantum Heisenberg equations. Several statistical quantities are calculated and the implications of the present results for sub shot-noise absorption measurements are discussed finally.
Phase-locked semiconductor laser arrays are attractive sources for applications requiring high ou... more Phase-locked semiconductor laser arrays are attractive sources for applications requiring high output powers in diffraction-limited beams [1]. Both gain-guided and index-guided devices have been reported, showing in all cases a limited range of stable operation [2]. The dynamics of index- guided structures have been successfully modeled [3], though there is a little amount of analysis on gain-guided arrays. In a previous work [4] a deterministic model relying on a variable-waveguide approach has been applied to gain-guided arrays, though in this model phase-sensitive interactions were not included. Nevertheless, it has been shown that phase-sensitive interactions strongly influences the dynamics of multimode semiconductor lasers [3],[5], though it is not clear yet how far the fluctuations induced by spontaneous emission noise affect the phase-sensitive interactions .
In this contribution we describe recent results on the generation and control of temporal localiz... more In this contribution we describe recent results on the generation and control of temporal localized structures in a passively mode-locked Vertical-Cavity Surface-Emitting Laser mounted in an external cavity closed by a resonant saturable absorber mirror. When the cavity roundtrip is much larger than the medium timescales, this system exhibits a temporal aspect-ratio large enough to host pulses which can be individually addressed. These localized pulses have been proposed as information bits and the possibility of their manipulation opens interesting perspectives for information processing. We will show that a modulation of the pumping current leads to control the position and the speed of the localized pulses within the cavity. In addition to pin the pulses at well-defined positions, which enables clocking the bit flow, the pulses can be driven to collide one against the other, thus unveiling the purely repulsive mutual interaction.
Quantum and Semiclassical Optics: Journal of the European Optical Society Part B, 1998
It is shown that the polarization ellipticity of light emitted by a VCSEL, which is optically pum... more It is shown that the polarization ellipticity of light emitted by a VCSEL, which is optically pumped with circularly polarized light, depends significantly on the strength of the transverse magnetic field. This dependence can be used for a precise determination of the electron ...
2011 Numerical Simulation of Optoelectronic Devices, 2011
We present a general method allowing to perform a direct bifurcation diagram and to determine the... more We present a general method allowing to perform a direct bifurcation diagram and to determine the stability of the solutions of a Traveling wave model. We exemplify the cases of the two level atom and the semiconductor quantum well lasers. I. INTRODUCTION The Maxwell-Bloch equations governing the laser dynamics can be regarded as a singularly perturbed problem: the fast re-
... Permissions & Reprints. Full length article. Mode competition in a Fabry-Perot se... more ... Permissions & Reprints. Full length article. Mode competition in a Fabry-Perot semiconductor laser: travelling wave model with asymmetric dynamical gain. M. Homar, S. Balle b , a and M. San Miguel b , a. ... Pll S00304018(96)002349 M. Homar et al. ...
The noise properties of non-degenerate parametric amplifiers with absorption losses which are dif... more The noise properties of non-degenerate parametric amplifiers with absorption losses which are different for the two beams are analysed by means of a semiclassical approach which enables the direct derivation of the Langevin equations for the optical fields from the quantum Heisenberg equations. Several statistical quantities are calculated and the implications of the present results for sub shot-noise absorption measurements are discussed finally.
Phase-locked semiconductor laser arrays are attractive sources for applications requiring high ou... more Phase-locked semiconductor laser arrays are attractive sources for applications requiring high output powers in diffraction-limited beams [1]. Both gain-guided and index-guided devices have been reported, showing in all cases a limited range of stable operation [2]. The dynamics of index- guided structures have been successfully modeled [3], though there is a little amount of analysis on gain-guided arrays. In a previous work [4] a deterministic model relying on a variable-waveguide approach has been applied to gain-guided arrays, though in this model phase-sensitive interactions were not included. Nevertheless, it has been shown that phase-sensitive interactions strongly influences the dynamics of multimode semiconductor lasers [3],[5], though it is not clear yet how far the fluctuations induced by spontaneous emission noise affect the phase-sensitive interactions .
Uploads
Papers by Salvador Balle