1.5 µm Synchronously Pumped Mode-locked Fiber Laser

We have realized a 1.5 μm synchronously pumped mode-locked fiber laser based on pump-induced cross phase modulation (XPM). The maximum repetition rate of the fundamental mode-locked pulses is up to 9.28 MHz, which is the highest repetition rate demonstrated in synchronously pumped Er-doped all-fiber mode-locked lasers. Moreover, integral and rational harmonic mode-locked pulses have also been demonstrated.