Salvador Balle

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Cavity solitons are localized intensity peaks that can form in a homogeneous background of radiation. They are generated by shining laser pulses into optical cavities that contain a nonlinear medium driven by a coherent field (holding beam). The ability to switch cavity solitons on and off and to control their location and motion by applying laser pulses(More)
We demonstrate, experimentally and theoretically, excitable nanosecond optical pulses in optoelectronic integrated circuits operating at telecommunication wavelengths (1550 nm) comprising a nanoscale double barrier quantum well resonant tunneling diode (RTD) photo-detector driving a laser diode (LD). When perturbed either electrically or optically by an(More)
We report a calculation of the eld spectrum of a single-mode semiconductor laser with weak optical feedback and compare it with numerical simulations. We show that the change in the spectral properties induced by weak feedback can be obtained by a simpler model which introduces frequency dependent losses. The increase in the asymmetry of the side peaks of(More)
We show experimentally and theoretically that an 1 electrically biased 200μm multi-transverse mode Vertical-Cavity 2 Surface-Emitting Laser can be passively mode-locked using 3 optical feedback from a distant Resonant Saturable Absorber 4 Mirror. This is achieved when one cavity is placed at the Fourier 5 plane of the other. Such non conventional optical(More)
Multimode dynamics in bidirectional laser cavities can be accurately described by folding space into time delay. This results in a set of delayed algebraic equations that preserve the dynamics of all cavity modes while drastically reducing number of degrees of freedom. This reduction allows for both linear stability analysis and bifurcation diagram(More)
We report on fabrication and characterization of single-longitudinal- and transverse-mode semiconductor ring lasers. A bifurcation from bidirectional stable operation to a regime with alternate oscillations of the counterpropagating modes was observed experimentally and is theoretically explained through a two-mode model. Analytical expressions for the(More)
G. Vaschenko,1 M. Giudici,2 J. J. Rocca,1 C. S. Menoni,1 J. R. Tredicce,2,3 and S. Balle3 1Center for Optoelectronic Computing Systems and Department of Electrical Engineering, Colorado State University, Fort Collins, Colorado 80523 2Institut Non Lineaire de Nice, UMR 129 CNRS-UNSA, 06560 Valbonne, France 3Departament de Fı́sica Interdisciplinar, IMEDEA(More)
We introduce a new class of excitable systems with two-dimensional fast dynamics that includes inertia. A novel transition from excitability to relaxation oscillations is discovered where the usual Hopf bifurcation is followed by a cascade of period doubled and chaotic small excitable attractors and, as they grow, by a new type of canard explosion where a(More)
Experimental evidence of stochastic resonance in an excitable optical system is reported. We apply a sinusoidal forcing to the system and, for a finite external noise level, we find a frequency for which the excitable pulsing occurs periodically at the frequency imposed by the modulation. This resonant frequency matches the inverse of the average escape(More)