Over 70 nm broadband-tunable Yb-doped fiber pulse laser based on trilaminar graphene

Abstract

An all-fiberized tunable Q-switched ring cavity laser was demonstrated to exploit a trilaminar graphene saturable absorber. Wavelength-tunable operation was achieved using a narrow-bandwidth tunable filter with a tunable range spanning from 1020.0 nm to 1090.4 nm. To the best of our knowledge, this is the widest tunable range for a Q-switched fiber laser in the 1 µm range. The linewidth of the emitting wavelength is less than 0.2 nm over the whole tunable range. This wavelength-tunable Q-switched pulse laser could provide a simple, low-cost and convenient light source for practical use.