Study On Flattented Dispersion Characteristics Of All Solid Multicore Microstructure Fiber

With the development of optical fiber communication technology,the microstructure fiber has been applied on many fields,such as scientific research,daily life,military application and so on.However,all solid microstructure fibers use quartz columns instead of air holes in the cladding of fiber,which maintains the structure of fiber in the drawing process to obtain the desired characteristics.Therefore,it has important practical significance to study all solid microstructure fibers in research.In this paper,the flattened dispersion of all solid microstructure fibers is researched.The main contents of this paper are as follows:First,this paper briefly describes the background and significance of microstructure fiber.Several common numerical simulation methods are introduced.Then,the research status of all solid microstructure fibers,flattened dispersion microstructure fibers and multi-core fibers are introduced.Second,two kinds of single-core and multi-core fibers are designed.The influence on the changes of the structure parameters on the dispersion characteristics of single-core and multi-core fibers is studied.A new dispersion regulation mechanism is found,which is mode coupling mechanism.Third,using the mode coupling mechanism and the modulation ability of the waveguide dispersion to the total dispersion,an all solid microstructural fiber with two-layer quartz columns is designed.By changing the quartz column spacing,the aperture of the quartz columns and the refractive index of the quartz columns,it can be found that the fiber can effectively achieve the dispersion flatness.Fourth,based on the all solid flattened dispersion microstructure fiber to change the structure,through the insertion of a high doped silica column in the fiber core to design an all solid microstructure fiber with three-layer quartz columns.Through numerical simulation,it can be found that the all solid microstructure fibers can not only achieve flattened dispersion,but also effectively reduce the bending loss.Finally,based on all solid microstructure fibers to study on the characteristics of effective mode area.A large effective mode area,flattened dispersion all solid microstructure fiber with four layers of quartz column structure is designed.The influence of the structural parameters on the characteristics of dispersion and the effective mode area of the optical fiber is also studied.