Energy-Efficient Transponder Configuration for FMF-Based Elastic Optical Networks

We propose an energy-efficient procedure for transponder configuration in few-mode fiber-based elastic optical networks in which bit error rate and physical constraints are guaranteed and joint optimization of temporal, spectral, and spatial resources are addressed. We use geometric convexification techniques to provide convex formulations for the signal-to-interference plus noise ratio, transponder power consumption, and transponder configuration problem. Simulation results demonstrate that the proposed convex formulation for the transponder configuration problem is considerably faster than its mixed-integer nonlinear counterpart. We consider transmit optical power as a configurable transponder parameter and show its optimization reduces total transponder power consumption more than 20%. We also analyze the impact of mode coupling and number of available modes on power consumption of different transponder elements.