Passive Harmonic Mode-Locked Soliton Fiber Laser Stabilized Using An Optically Pumped Saturable Bragg Reflector

Stabilization of passive harmonic mode-locking is achieved for the first time in an Er/Yb soliton fiber laser by optically pumping the semiconductor saturable absorber above band gap. Results show 35-dB mode suppression of undesired harmonics.