Mechanism of Dissipative-Soliton-Resonance Generation in Passively Mode-Locked All-Normal-Dispersion Fiber Lasers

Abstract

Numerical simulations on dissipative-solitonresonance generation in an all-normal-dispersion fiber ring laser are presented. Situations with monotonic and periodical saturable absorption are both considered. The multipulse operation in dissipative soliton laser is found to be caused by the spectral filtering effect that limits the spectral maximum width. And the multipulsing can be fully circumvent by inducing strong peak-power-clamping effect of a sinusoidal saturable absorber in the cavity. When the cavity peak-power-clamping effect is strong enough that the pulse peak-power and the pulse spectral width are both confined at a low value, the spectral filtering effect induced multipulse operation is prevented and the dissipative-soiton-resonance is generated. Otherwise, the spectral filtering effect causes pulse breaking before the pulse peak power reaches the saturation point. Further results show that under the dissipative-soliton-resonance, the generated pulse peak power can be directly controlled by the cavity peak-power-clamping effect, which is determined by the saturation power of the saturable absorber.

Impact of Spectral Filtering on Multipulsing Instability in Mode-Locked Fiber Lasers

“…The pulse evolution in the gain fiber of the laser cavity is modeled by the nonlinear Schrödinger equation (NLS) with gain as [14], (1) where β2, β3 and γ are the second order dispersion, third order dispersion, and nonlinear coefficients, respectively. We focus on fiber lasers in the anomalous dispersion regime since these are more common.…”

“…Broadband pulses experience larger losses due to the spectral filter. Thus pulses with different energies (and associated bandwidths) experience an energy dependent loss even though the filtering action is only a frequency dependent [13,14].…”

“…The impact of spectral filtering on mode-locked fiber lasers is well known [13][14][15][16]. When a narrow-band spectral filter is used in a normally dispersive fiber cavity, self-similar pulse propagation in the gain fiber greatly enhances the pulse quality [17], but with spectral filtering remaining a trigger for the multi-pulsing instability [14].…”

“…When a narrow-band spectral filter is used in a normally dispersive fiber cavity, self-similar pulse propagation in the gain fiber greatly enhances the pulse quality [17], but with spectral filtering remaining a trigger for the multi-pulsing instability [14]. The pulse evolution in an anomalously dispersive fiber laser cavity is more complex, and hence periodic and chaotic dynamics are observed in addition to the multi-pulsing transition [18][19][20].…”

Dissipative soliton mediated radiations in active silicon-based waveguides

“…The additional balance of gain and loss results in solutions which are fixed (but not a family of solution) in parameter space [14]. Unlike bright Kerr solitons, the DSs are found both in anomalous dispersion (AD) [15], [16] and normal dispersion (ND) regime [17], [18]. The spectral characteristics of DS differ significantly in ND, where we observe a flat top spectra [19].…”