Noise-like pulse generation with coherence spike in all-fiber passively mode-locked Yb-doped fiber laser

Abstract

We report a noise-like pulse generation with coherence spike from an all-fiber passively mode-locked Yb-doped fiber laser in all-normal dispersion region. It is implemented by using a fiber-pigtailed spectral bandpass filter. The output pulse duration of the noise-like pulse is achieved approximately 15.77 ps and its coherence spike pulse is measured to be 120 fs.