Multi-wavelength dissipative soliton operation of an erbium-doped fiber laser

Abstract

We report on the generation of multi-wavelength dissipative soliton (DS) in an all normal dispersion fiber laser passively mode-locked with a semiconductor saturable absorber mirror (SESAM). We show that depending on the strength of the cavity birefringence, stable single-, dual- and triple-wavelength DSs can be formed in the laser. The multi-wavelength soliton operation of the laser was experimentally investigated, and the formation mechanisms of the multi-wavelength DSs are discussed.

Polarization attractors in harmonic mode-locked fiber laser

“…The pulses at the fundamental and 3rd harmonic have different group velocities and were drifting on the scope from each other. Similar results obtained for figure-of-eight and SESAM-based fibre lasers suggest that this dual-wavelength behavior can be attributed to the birefringence-induced filtering effect [19,20]. The laser output demonstrated a slowly evolving SOP with a sector-type attractor on the Poincaré sphere.…”

“…The pump power increase to 147 mW yielded the dual-wavelength laser operation with central wavelengths at 1555.5 and 1531 nm. This complex optical spectrum corresponded to a co-existence of vector solitons traveling at the fundamental and 3rd harmonics and can be attributed to the birefringence-induced filtering effect [19,20].…”

Compact graphene mode-locked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion

“…To achieve wavelength tuning of a mode locked laser, conventionally a tunable bandpass filter is inserted in the cavity to limit the effective laser gain bandwidth [13]. In our experiments in order to simplify the laser configuration, we have made use of the intrinsic artificial birefringence filter effect of the lasers [10]. To this end we intentionally introduced strong cavity birefringence into the laser cavities through over bending the fibers looped in polarization controller.…”

7-GHz high-repetition-rate mode-locked pulse generation using short-cavity phosphate glass fiber laser

“…The mode spacing for every wavelength is 0.056 nm (7 GHz). However, this mode locked fiber laser is very different from the multi wavelength mode locking mentioned in [22], where the mentioned three wave length mode locking appears at the same time once the pump power is over the threshold. This feature results from the filter effect of the nonlinear polarization evo lution (NPE) mode locked technique.…”