▎ 摘　　要

Graphene pasted on the surface of a nanostructure, e.g., microfiber, enables such graphene-based devices to have excellent photonic and electronic properties. In this paper, an all-optical modulator based on a polymer-supported bilayer graphene film half-wrapped on the surface of the microfiber has been theoretically presented and discussed to make the best use of its ultrawide bandwidth. According to the theoretical analyses on the graphene-microfiber modulator, 100 Gbit/s 8 channel synchronous modulation has been realized with similar to 14.88 and similar to 14.80 dB modulation depth, respectively, for two polarized modes. The channel wavelength of such modulator covers C, L, and U bands. To ensure the extinction ratio of 16 channel synchronous modulation to be larger than 5 dB, the bilayer graphene-microfiber interaction length of the modular should be greater than 93.06 mu m and the diameter of the microfiber be around 1.8 mu m. Under this condition, it also has a tolerance on signal deterioration, as it could effectively decrease the noise of "0" signal. (C) 2016 Optical Society of America