Active mode-locking of an InGaAsP 1.55 μm laser in a fibre resonator with an integrated single-mode-fibre output port

Abstract

We describe the first 1.55 μm InGaAsP optical-fibre composite-cavity laser with an integrated single-mode-fibre output port. Mode-locked pulsewidths of 4.8 ps at a 2 GHz repetition rate, with peak powers of 56 mW, are demonstrated. These are the shortest reported mode-locked pulses from InGaAsP lasers.