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Design and Performance Investigation of Graphene-Based Modulators for 1550 and 1310 nm Optical Communication Wavelengths

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

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Author NameUniversity of Author
Abstract (2. Language): 
This paper addresses the design and performance investigation of grapheme-based optical modulators (GBOMs) for 1550 and 1310 nm optical communication wavelengths. The design stands heavily on two commercial software packages, namely COMSOL Multiphysics and LUMERICAL. The graphene optoelectronic properties, such as surface conductivity, relative permittivity, and refractive index, are first calculated theoretically as a function of operating wavelength and applied voltage. These calculations are useful to model the graphene as a new element in the software package element library. Accordingly, four GBOMs configurations are designed, two waveguide modulators (WGMs) and two Mach-Zehnder modulators (MZMs). Each modulator is based on either square or rectangular cross section silicon waveguide covered with a graphene layer. The calculations and simulation results reveal that the modulator bandwidth is enhanced by 50 % at 1550 nm and 35 % at 1310 nm when the square waveguide is replaced by a rectangular one. Further, both WGM and MZM modulators have almost the same bandwidth. At 1550 nm wavelength, the waveguide modulator offers 324.4 and 162.2 GHz bandwidth for 100- and 200 μm-waveguide lengths, respectively.
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International Journal of Science and Engineering Investigations, Volume 6, Issue 61, February 2017 166
www.IJSEI.com Paper ID: 66117-21
ISSN: 2251-8843
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