Search

Weak interactions of temporal cavity solitons resulting from gain saturation and recovery in a delay differential model of a long cavity semiconductor laser were studied numerically and analytically using an asymptotic approach. This paper shows that in addition to the usual soliton repulsion leading to a harmonic mode-locking regime, soliton attraction is also possible in a laser with a nonzero linewidth enhancement factor. It is shown numerically that this attraction can lead either to pulse merging or to pulse bound-state formation.

Weak interactions of temporal cavity solitons resulting from gain saturation and recovery in a delay differential model of a long cavity semiconductor laser were studied numerically and analytically using an asymptotic approach. This paper shows that in addition to the usual soliton repulsion leading to a harmonic mode-locking regime, soliton attraction is also possible in a laser with a nonzero linewidth enhancement factor. It is shown numerically that this attraction can lead either to pulse merging or to pulse bound-state formation. [ABSTRACT FROM AUTHOR]

We propose and analyze a theoretical scheme of an injected Kerr cavity, where the chromatic dispersion is induced by propagation of light through two Lorentzian spectral filters with different widths and central frequencies. We show that this setup can be modeled by a second order delay differential equation that can be considered as a generalization of the Ikeda map with included spectral filtering, dispersion, and coherent injection terms. We demonstrate that this equation can exhibit modulational instability and bright localized structures formation in the anomalous dispersion regime.

We propose and analyze a theoretical scheme of an injected Kerr cavity, where the chromatic dispersion is induced by propagation of light through two Lorentzian spectral filters with different widths and central frequencies. We show that this setup can be modeled by a second order delay differential equation that can be considered as a generalization of the Ikeda map with included spectral filtering, dispersion, and coherent injection terms. We demonstrate that this equation can exhibit modulational instability and bright localized structures formation in the anomalous dispersion regime. [ABSTRACT FROM AUTHOR]

In this paper, we report a new method to generate tunable high-repetition-rate temporal cavity solitons (TCSs) in a nonlinear fiber cavity, which is driven by dual Brillouin laser pulses. This method is more feasible than generating solitons via a continuous optical-driven nonlinear cavity because of the enhanced four-wave mixing process triggered by the high peak intensity Brillouin laser pulses. The generated TCSs lock to the beating signal arriving from dual Brillouin pulses, which allows the repetition rate of the solitons to be directly tuned all- optically. The TCSs can be continuously tuned over a repetition rate range of 140∼242 GHz by controlling the external dual-wavelength spacing, and the pulse duration can be accordingly adjusted from 0.9 ps to 513 fs. Such TCSs with tunable high-repetition-rate can provide a practical solution for the low-noise controllable millimeter-wave and terahertz sources.

In this paper, we report a new method to generate tunable high-repetition-rate temporal cavity solitons (TCSs) in a nonlinear fiber cavity, which is driven by dual Brillouin laser pulses. This method is more feasible than generating solitons via a continuous optical-driven nonlinear cavity because of the enhanced four-wave mixing process triggered by the high peak intensity Brillouin laser pulses. The generated TCSs lock to the beating signal arriving from dual Brillouin pulses, which allows the repetition rate of the solitons to be directly tuned all- optically. The TCSs can be continuously tuned over a repetition rate range of 140∼242 GHz by controlling the external dual-wavelength spacing, and the pulse duration can be accordingly adjusted from 0.9 ps to 513 fs. Such TCSs with tunable high-repetition-rate can provide a practical solution for the low-noise controllable millimeter-wave and terahertz sources. [ABSTRACT FROM AUTHOR]

Nonlinear localised structures appear as solitary states in systems with multistability and hysteresis. In particular, localised structures of light known as temporal cavity solitons were observed recently experimentally in driven Kerr-cavities operating in the anomalous dispersion regime when one of the two bistable spatially homogeneous steady states exhibits a modulational instability. We use a distributed delay system to study theoretically the formation of temporal cavity solitons in an optically injected ring semiconductor-based fiber laser, and propose an approach to derive reduced delay-differential equation models taking into account the dispersion of the intracavity fiber delay line. Using these equations we perform the stability and bifurcation analysis of injection-locked continuous wave states and temporal cavity solitons. [ABSTRACT FROM AUTHOR]

A semiconductor ring laser with a long cavity supports propagating localised structures with a chiral charge, named phase solitons. In this paper we study the dependence of the velocity and of the duration of the phase solitons on the characteristic time scales of the laser, namely the photon lifetime and the carrier lifetime. We show numerically that phase solitons are stable over a large range of those parameters and verify that the propagation velocity decreases linearly with the ratio of the carrier lifetime to the photon lifetime, while the duration is proportional to the ratio of the carrier lifetime to the cavity roundtrip time. [ABSTRACT FROM AUTHOR]

A semiconductor ring laser with a long cavity supports propagating localised structures with a chiral charge, named phase solitons. In this paper we study the dependence of the velocity and of the duration of the phase solitons on the characteristic time scales of the laser, namely the photon lifetime and the carrier lifetime. We show numerically that phase solitons are stable over a large range of those parameters and verify that the propagation velocity decreases linearly with the ratio of the carrier lifetime to the photon lifetime, while the duration is proportional to the ratio of the carrier lifetime to the cavity roundtrip time.

We report on the experimental observation of bunching dynamics with temporal cavity solitons (CSs) in a continuously-driven passive fibre resonator. Specifically, we excite a large number of ultrashort CSs with random temporal separations, and observe in real time how the initially random sequence self-organizes into regularly-spaced aggregates. To explain our experimental observations, we develop a simple theoretical model that allows long-range acoustically-induced interactions between a large number of temporal CSs to be simulated. Significantly, results from our simulations are in excellent agreement with our experimental observations, strongly suggesting that the soliton bunching dynamics arise from forward Brillouin scattering. In addition to confirming prior theoretical analyses and unveiling a new CS self-organization phenomenon, our findings elucidate the manner in which sound interacts with large ensembles of ultrashort pulses of light.