A 1.55 µm, 271 fs and 1.07 µm, 294 fs simultaneously mode-locked Er- and Yb-doped fiber laser with a single SWNT/PVA saturable absorber

Abstract

We demonstrate simultaneous femtosecond pulse generation at 1.55 and 1.07 µm using a passively mode-locked Er- and Yb-doped fiber laser whose two ring cavities share the same SWNT saturable absorber. Pulse widths as short as 270∼290 fs were simultaneously obtained at both wavelengths.