Abstract

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 14.88 and 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 μm and the diameter of the microfiber should be around 1.8 μm. Under this condition, it also has a tolerance on signal deterioration, as it could effectively decrease the noise of “0” signal.

© 2016 Optical Society of America

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