Raman-scattering-assistant broadband noise-like pulse generation in all-normal-dispersion fiber lasers

摘要

We report on the observation of both stable dissipative solitons andnoise-like pulses with the presence of strong Raman scattering in a relativelyshort all-normal-dispersion Yb-doped fiber laser. We show that Raman scatteringcan be filtered out by intracavity filter. Furthermore, by appropriateintracavity polarization control, the Raman effect can be utilized to generatebroadband noise-like pulses (NLPs) with bandwidth up to 61.4 nm. To the best ofour knowledge, this is the broadest NLP achieved in all-normal-dispersion fiberlasers