▎ 摘　　要

Environmentally-stable, all-polarizationmaintaining Q-switching ytterbium-doped fiber laser was demonstrated using graphene as saturable absorber. By optically driving deposition of graphene onto the fiber connector, the saturable absorber is fabricated and inserted into the laser cavity to construct the Q-switching fiber laser. The maximum average output power of 15.6 mW at a repetition rate of 110 kHz, which corresponds to a single pulse energy of 141.8 nJ, was achieved. They are the maximum average output power and the highest single pulse energy reported so far for graphene Q-switched fiber lasers. (C) 2012 by Astro, Ltd.