Self-pulsing and dynamic bistability in cw-pumped Brillouin fiber ring lasers

CW-pumped polarization-maintaining Brillouin fiber ring laser: I. Self-structuration of Brillouin solitons

“…[ (1) to (6) Our experiments and the corresponding numerical simulations show also that the roundtrip time decreases uniformly vs. pump power or energy per pulse (figures 18 and 19), which corroborates our theoretical prediction that in the vicinity of the nonlinear threshold, the pulse are subluminous, but superluminous near the bifurcation [6]. The lack of a flat zone in these curves clearly shows that the nonlinear interaction can never be neglected.…”

“…At the bifurcation point appears a periodic modulation of the Stokes signal, either at a frequency equal to the cavity free spectral range for the large values of R ef f , or at twice this frequency when R ef f is lower (figure 4) in agreement with the stability analysis [6]. When the pump power is still decreasing, these oscillating regimes are replaced by a pulsed regime with a frequency close to the ring FSR.…”

“…The three-wave coherent model we have introduced several years ago for the description of stimulated Brillouin scattering (SBS) in single-mode optical fiber resonators [1], derived from the model developed for fluids [2] [3], has been the tool for finding Brillouin soliton self-structuration [4] - [6], and has been now largely adopted by the scientific community [7], because it gives simple explanations of features such that the finite Brillouin gain bandwidth [8], generation of Stokes pulses called dissipative Brillouin solitons [4] in the fiber ring cavity, the bifurcation between the stationary Brillouin mirror and the pulsed dynamics in the cw-pumped fiber cavity leading to stable soliton pulses [5], and quantitative agreement with the experiments in the whole self-pulsing domain [6], which are elsewhere impossible to describe through the older incoherent model of intensity equations [9]. The two governing ideas of this coherent model are that (1.)…”

“…We have experimentally and numerically determined the whole soliton localisation domain as function of I p and R for different pump wavelengths λ p , from visible to infrared, and different cavity lengths L in non polarization-maintaining fiber-ring cavities [6].…”

Stimulated Brillouin scattering slow light in high nonlinearity silica microstructure fiber

“…In the other path, the light is amplified by another EDFA (EDFA2), then is injected into a fiber ring cavity, which serves as a Brillouin laser, with a circulator, a piece of 60-m long SMF, a PC and a 1:99 coupler. If the gain of the ring cavity is proper, Brillouin self pulsing (BSP) will be generated in the ring cavity [8]. In this experiment, the stable BSP output of the ring cavity with a full width at half maximum (FWHM) of 70 ns and a pulse period of 400 ns (shown in Fig.…”