All-fiber electro-optical modulator based on graphene materials and method thereof

Abstract

The invention discloses an all-fiber electro-optical modulator based on graphene materials and a method of the all-fiber electro-optical modulator. The all-fiber electro-optical modulator based on the graphene materials comprises a single mode fiber, a silicon dioxide groove-type substrate, an Al2O3 transition thin layer and a graphene membrane, wherein the single mode fiber is arranged on the silicon dioxide groove-type substrate and fixed through sealed epoxy glue, a groove is formed in the single mode fiber, the Al2O3 transition thin layer is arranged in the groove, and the graphene membrane is arranged on the Al2O3 transition thin layer. Conductivity performance of graphene is changed through change of voltage applied on a metal electrode, therefore an imaginary part or a real part of an effective refractive index of a graphene composite layer structure is changed, and an electric absorption strength modulator or a phase modulator is achieved. The all-fiber electro-optical modulator based on the graphene materials and the method of the all-fiber electro-optical modulator can achieve design of the all-fiber electro-optical modulator, and have the advantages of being tiny in size, little in power consumption, low in insertion loss, high in modulating speed, beneficial for optical integration and the like. In addition, due to the fact that additional optoelectronic devices are not introduced, the all-fiber electro-optical modulator based on the graphene materials and the method of the all-fiber electro-optical modulator are suitable for being used in an all-fiber communication system and a dense wavelength division multiplexing (DWDM) system.

Description

technical field [0001] The invention belongs to the fields of optical communication, sensing technology and optoelectronic devices, and in particular relates to a graphene-based all-fiber electro-optic modulator and a method thereof. Background technique [0002] In the information society, the increasing development of data communication and the Internet has led to an increase in the market's demand for transmission rate and communication capacity, so that the demand for optical transmission networks has also increased rapidly. In large-capacity optical transmission systems, high-speed modulation of optical signals must be indispensable. The optical modulator is a key device for high-speed, long-distance optical communication and one of the most important integrated optical devices. Optical modulators can be divided into electro-optic, thermo-optic, acousto-optic, and all-optical according to their modulation principles. Among them, the electro-optic modulator is superior...

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Problems solved by technology

[0006] Existing optical communication systems use a large number of independently packaged single modulators. The graphene modulator based on waveguide structure needs to connect optical fibers at both ends in order to be compatible with optical communication systems; at the same time, the coupling between waveguide and optical fiber will produce large loss; and the cost of the waveguide package will also increase the cost of the device

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