Impact of fiber nonlinearity on the performance of mode division multiplexing systems

Abstract EN

In this paper, an analytical model is developed to estimate a nonlinear phase noise (NPN) due to Kerr fiber nonlinearity and its interaction with amplifier noise in mode division multiplexing (MDM) systems.

Our analysis uses generalized coupled multimode nonlinear Schrödinger equations(MM- NLSE) that describe the propagation of the mode superimposing in the optical fiber.

The nonlinear phase noise versus channel power and transmission distance is evaluated by implementing our analytical model for LP01, LP11a, and LP11b spatial modes.

Each mode carries a 4-QAM signal at a symbol rate of 20 Gsymbol/s.

The results reveal that LP11 mode has a lower phase noise variance than LP01 mode over entire transmission distances.

finally, the error vector magnitude (EVM) versus channel power is quantified using an analytical model.