Showing papers by "Guy Millot published in 1999"
TL;DR: In this paper, a set of experimental observations that demonstrate the generation of vector trains of dark-soliton pulses in the orthogonal axes of a highly birefringent optical fiber is presented.
Abstract: We present a set of experimental observations that demonstrate the generation of vector trains of dark-soliton pulses in the orthogonal axes of a highly birefringent optical fiber. We generated dark-soliton trains with terahertz repetition rate in the normal group-velocity dispersion regime by inducing a polarization modulational instability by mixing two intense, orthogonal continuous laser beams. Numerical solutions of the propagation equations were used to optimize the emission of vector dark pulses at the fiber output.
36 citations
TL;DR: In this article, the authors investigated the phenomenon of polarization modulational instability in the conditions of effective isotropy of the Kerr medium and showed that birefringence in spun fibers can be negligibly small as compared to nonlinear effects.
Abstract: By means of a very low birefringence spun fiber, we investigate experimentally the phenomenon of polarization modulational instability in the conditions of effective isotropy of the Kerr medium. By showing that birefringence in spun fibers can be negligibly small as compared to nonlinear effects, our results open up new prospects in the development of applied nonlinear fiber optics. This aspect is illustrated through the generation of polarization domain walls whose interest for optical fiber data transmissions has been recently discussed.
35 citations
TL;DR: Characterization of the intensity and the phase of the PDW train shows complete switching between adjacent domains of counterrotating circular polarizations and directly confirms predictions based on numerical simulations of the incoherently coupled nonlinear Schrödinger equations.
Abstract: Polarization domain-wall (PDW) trains have been generated at a repetition rate of 0.6 THz in an ultralow-birefringence spun optical fiber and measured by use of an adapted frequency-resolved optical gating technique. Characterization of the intensity and the phase of the PDW train shows complete switching between adjacent domains of counterrotating circular polarizations and directly confirms predictions based on numerical simulations of the incoherently coupled nonlinear Schrodinger equations.
22 citations
TL;DR: In this paper, a 2.5 THz train of dark solitons in an optical fiber is characterized using an adapted frequency-resolved optical gating technique, which is in good agreement with numerical simulations.
Abstract: Complete intensity and phase characterisation of optical pulse trains at terahertz repetition rates is carried out using an adapted frequency-resolved optical gating technique. The experimental characterisation of a 2.5 THz train of dark solitons in an optical fibre is in good agreement with numerical simulations.
12 citations
TL;DR: Modulational instability in a normally dispersive bimodal fiber under modal group-velocity-matching conditions and higher order sideband harmonics detected in the output spectra as well as autocorrelation measurements reveal the formation of subpicosecond domain- wall structures reminiscent of the domain-wall soliton.
Abstract: We study experimentally modulational instability in a normally dispersive bimodal fiber under modal group-velocity-matching conditions. In the strong pump depletion regime, higher order sideband harmonics detected in the output spectra as well as autocorrelation measurements reveal the formation of subpicosecond domain-wall structures. Across these temporal structures the electromagnetic field distribution switches abruptly between the two transverse modes of the fiber. These structures are reminiscent of the so-called domain-wall soliton. Our results constitute therefore an experimental indication of the existence of this fundamental soliton.
10 citations
01 Sep 1999
TL;DR: It is well known that intense quasi-CW fields injected into optical fibers can evolve into ultrafast periodic pulse trains at THz repetition rates as a result of the interplay between nonlinear and dispersive effects as discussed by the authors.
Abstract: It is well-known that intense quasi-CW fields injected into optical fibers can evolve into ultrafast periodic pulse trains at THz repetition rates as a result of the interplay between nonlinear and dispersive effects.
01 Sep 1999
TL;DR: In optical fibers, the interplay of the optical Kerr effect and chromatic dispersion leads to modulational instability as discussed by the authors, where a continuous wave undergoes a modulation of its amplitude or phase in the presence of quantum noise or a frequency shifted signal wave (induced-MI).
Abstract: In optical fibers, the interplay of the optical Kerr effect and chromatic dispersion leads to modulational instability (MI) [1]: a continuous wave undergoes a modulation of its amplitude or phase in the presence of quantum noise or a frequency shifted signal wave (induced-MI).
01 Sep 1999
TL;DR: The instabilities that arise from electromagnetic wave propagation in optical fibers have been the subject of extensive study in recent years as mentioned in this paper and have been identified as a major cause of optical fiber failures.
Abstract: The instabilities that arise from electromagnetic wave propagation in optical fibers have been the subject of extensive study in recent years.
01 Jan 1999
TL;DR: In this article, it has been shown that scalar MI only occurs when the group velocity dispersion (GVD) is negative (anomalous dispersion regime) for a single pump wave propagating in a standard non birefringe.
Abstract: In optical fibers, the interaction between nonlinear and dispersive effects leads to phenomena such as modulational instability (MI)[1, 2, 3, 4, 5, 6], in which a continuous or quasi-continuous wave undergoes a modulation of its amplitude or phase in the presence of noise or any other small perturbation. The perturbation can originate from quantum noise (spontaneous-MI) or from a frequency shifted signal wave (induced-MI). MI has been observed for the first time for a single pump wave propagating in a standard non birefringe.nt fiber (scalar MI)[7]. It has been shown that scalar MI only occurs when the group velocity dispersion (GVD) is negative (anomalous dispersion regime).
01 Sep 1999