Competition and coexistence of ultrashort pulses in passive mode-locked lasers under dissipative-soliton-resonance conditions

Dissipative soliton resonance and reverse saturable absorption in graphene oxide mode-locked All-Normal-Dispersion Yb-doped fiber laser

“…And most energy of the pulse concentrated near the central wavelength, as the flat-top part of pulse has little chirp. By mode competition, the spectrum became extremely narrow [4]. We should note that the spectrum width in simulation work is much narrower than experimental one's, since the latter has some fluctuations on the top of the pulse leading to stronger SPM effect which broadens the spectrum a bit (Fig.1 c).…”

“…The quintic nonlinear term seems to have little influence relatively in normal dispersion. However the quintic saturable term which stands for reverse saturable absorption plays a big role in pulse shaping from bell to square [4]. That is why most DSR phenomenon were reported in a fiber type mode-locking mechanism such as NPR and Nonlinear loop mirror, both of which have a nonlinear transmission of sine curve.…”

“…The pulse energy increases with pump power linearly up to 160nJ limited by the damage threshold of devices. The phenomenon has already been modelled by cubic-quintic Ginzburg-Landau equation [1][2][3][4], which has additional cubic and quintic saturable absorption terms and quintic nonlinear term, compared with conventional Ginzburg-Landau equation. The quintic nonlinear term seems to have little influence relatively in normal dispersion.…”

“…Dissipative soliton resonance (DSR) has been reported for years [1][2][3][4][5][6][7], which has characteristics of infinite pulse energy in theory, longer pulse duration and narrow spectral bandwidth, operating either in normal or anomalous dispersion regimes. It is an efficient way to enhance the level of the pulse energy, which increases linearly with pump power without wave breaking.…”

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

“…Ding et al proved that the DSR was achievable with realistic laser settings [24]. Komarov et al investigated the competition and coexistence of ultrashort laser pulses under the DSR conditions [25]. They found that the number of the DSR pulses in steady-state operation depended on the initial conditions, but would not change with increasing pump power.…”