Broadband Wavelength-Tunable Harmonically Mode-Locked Fiber Ring Laser Using a Bismuth-Oxide-Based Erbium-Doped Fiber and a Bismuth-Oxide-Based Highly Nonlinear Fiber

We demonstrate a harmonically mode-locked laser employing a 151-cm-long bismuth-oxide-based erbium-doped fiber and a 250-cm-long bismuth-oxide-based nonlinear fiber. Stable 10-GHz short pulses are obtained with a 60-nm tuning range covering both the C- and L-bands.