Simulation Analysis of Multicore Concentric Fibers by Space Division Multiplexing (PDF)

Master's Thesis from the year 2017 in the subject Engineering - Communication Technology, grade: 3.13/4, , course: Optical Fiber Communication, language: English, abstract: Due to rapidly growing technological trends higher data rate support has become the key feature in future communication medium selection. Multi-mode optical fiber cable and Multi-core optical fiber is well matched for high data rate throughput requirements due to its tendency to support multiple modes through one core at a time which results in to higher data rates. But with multi-mode modal dispersion, crosstalk is the main limiting factor.

So in this research work we have investigated the fiber design parameters core diameter (µm), Wavelength (nm), refractive index profile to achieve Few mode fiber , their number of channels, curves of group delay, material losses , Bending losses , PMD and effective Nonlinear Refractive Index for each guided mode. Space Division Multiplexing is promising future technology which uses few mode fiber in parallel to form multicore fiber.

This research work also includes the calculation of radial distance, guided modes and there losses through 12 cores single mode fiber. Then designed a 12 cores few mode fiber with different refractive index and core diameter. These tests are done on standard 2nd window wavelength 1550 µm. Simulations and results of different designs according to standard area of 125µm have been presented in this thesis. Conclusion of this research is we can design concentric cores single mode fiber (CCSMF) up-to 4 layers within 125 µm , and can enhance bandwidth of fiber. Concentric core Fiber can be used for military purpose i.e. inner core can be used for message signal whereas outer cladding will keep alarm signal in it.