▎ 摘　　要

In this paper, a desirably simple, convenient and inexpensive saturable absorber mirror has been fabricated based on graphene, which has no wavelength selectivity. Moreover, there are no changes in the structure and characteristics of graphene. By inserting the graphene-PMMA SA mirror to the Nd:YAG laser, the shortest pulse width of 260 ns can be obtained with the single-pulse energy of about 8.32 mu J. The experimental results prove that our graphene-PMMA SA mirror is feasible and suitable for Q-switched lasers. (C) 2011 Elsevier B.V. All rights reserved.