Proceedings of SPIE - the International Society for Optical Engineering
Spatial Domain Multiplexing (SDM) is a novel technique in optical fiber communications. Single mode fibers are used to launch Gaussian beams of the same wavelength into a multimode step index fiber at specific angles. Based on the launch angle, the channel follows a helical path. The helical trajectory is explained with the help of vortex theory. The electromagnetic wave based vortex formation and propagation is mathematically modeled for multiple channels and the results are compared against experimental and simulated data. The modeled output intensity is analyzed to show a relationship between launch angle and the electric field intensity.
Murshid, S. H., Zahir, E., Biswas, R., & Chakravarty, A. (2010). SDM propagation model for multiple channels using electromagnetic theory and vortex analysis. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, 7682 doi:10.1117/12.850584