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

TL;DR

This paper demonstrates the generation of broadband noise-like pulses up to 61.4 nm in all-normal-dispersion fiber lasers, utilizing Raman scattering and intracavity polarization control to achieve the broadest NLP in such lasers.

Contribution

It introduces a method to generate the broadest noise-like pulses in all-normal-dispersion fiber lasers using Raman scattering and intracavity polarization tuning.

Findings

Achieved broadband NLP with 61.4 nm bandwidth.

Raman scattering can be filtered or utilized for pulse shaping.

Demonstrated stable dissipative solitons and noise-like pulses in the laser.

Abstract

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