The Research On Optical Communication Technology Based On Dammann Grating

The popularization of 5G technology brings a brand new way of life to the human society.In the context of the "Internet of everything",the information transmission network will experience an enormous challenge.On the other hand,the surging number of Internet users,the growing number of applications and the urgent demand for traffic are all warning of a capacity crisis.However,China's vast territory and large population also coincides with the critical period of reform and opening up.Politics,military,culture,education,medical treatment and urban construction all have a great dependence on the information transmission network.Therefore,it is urgent to develop a new generation of information transmission network.As an important part of information transmission network,optical transmission network has made great progress in recent years.As a new optical communication technology,air division multiplexing technology has attracted more and more people's attention and is expected to become an important multiplexing method in the next generation of transmission networks.As the signal carrier of air division multiplexing technology,the application of singularities beam in the field of optical communication has developed rapidly in recent years.In the face of the need of developing a new generation of information transmission network,it seems that using the singularities beam as the signal carrier of the air division multiplexing technology is an excellent choice.As a new generation of information transmission network,how to efficiently reuse and demultiplexing singularities has become an important link towards practical application.This paper discusses the main situation of singularities beam in the field of optical communication,compares several multiplexing and demultiplexing modes of singularities beam,and carries out research on optical communication based on dammann grating mainly including two aspects according to the application requirements of demultiplexer:(1)the modulation principle of OAM beam by vortex-dammann grating is analyzed,the multiplexing and demultiplexing of OAM beam by vortex-dammann grating is studied,the scheme of demultiplexer using vortex-dammann grating channel efficiently is designed,and the experiment of multiplexing and demultiplexing is verified.(2)the modulation principle of vortex dammann grating for CVBs beam was analyzed,a highintegration multiplexer for CVBs beam was designed by making full use of the optical characteristics of CVBs beam,and the multiplexing and demultiplexing experiments of CVBs optical communication were carried out for many times to verify the design performance of the device.In general,this paper is based on the singularity beam as the main line,through the use of dammann grating to solve the singularity beam multiplexing and demultiplexing technical problems.