Research On Electro-optical Control Technology Of Graphene Coated D-type Fiber

With the development of information science and technology,optical modulators,as the most important component in the field of optical fiber communication systems and integrated optics,are developing towards high speed,wide bandwidth,high extinction ratio,low loss,easy integration,and low cost.Due to the limitations of their own material properties,the existing traditional electro-optical materials can no longer meet the needs of current modulators.Therefore,the fabrication of novel electro-optical modulators has become the focus of current research.Graphene is a new material with a two-dimensional honeycomb structure.It has the advantages of zero band gap,high carrier mobility,no wavelength selection for light absorption,low integration cost and CMOS process compatibility.When graphene materials are used in modulators,the performance of modulators can be further improved by adjusting the interaction between graphene and light.In this paper,the electro-optical modulation characteristics of graphene-coated D-mode multimode fiber are studied.The mathematical model is established and simulated theoretically.Furthermore,an in-depth experimental study of the electro-optical modulation characteristics is carried out.The main continent includes:Firstly,based on a large number of domestic and foreign references,the current research status of electro-optical modulators is reviewed.Besides,the realization methods and technical characteristics of light modulators based on graphene materials are summarized,and the research significance of this subject is expounded.Secondly,the structure and properties of the new graphene material are analyzed.It includes the study of the special optical properties,electrical properties,mechanical properties and thermal conductivity of the graphene.Meanwhile,the preparation and transfer methods of the graphene are also researched.Thirdly,the principle of electrical modulation of graphene is studied,and the performance parameters of the electrical modulator are analyzed.The modulation structure of the D-type multimode fiber is designed.Moreover,the influence of the graphene layer on the light absorption efficiency of D-type fiber modulator is researched by finite element method and simulation software.Furthermore,the structure and parameters of the proposed graphene-coated D-type fiber electro-optic modulator are theoretically analyzed by finite element method,including the polishing depth of the D-type optical fiber,the number of graphene layers and the transition material.On this basis,a graphene coated double D structure fiber modulator structure is proposed.Finally,an experimental system for the electro-optical modulation characteristics of the graphene-coated D-type optical fiber is designed.The detailed experimental study is carried out,and the experimental results are deeply analyzed.The graphene-coated D-type fiber electro-optic modulator designed in this paper possesses outstanding advantages such as simple structure and easy manufacturing and processing.The research results provide a theoretical basis and experimental reference for the development of a new type of electro-optic modulator.