Abstract
This work presents a theoretical investigation on the per-
formance of directly modulated/detected (DM/DD) optical orthogonal
frequency division multiplexed (OOFDM) systems subject to optical filter-
ing. The impact of both linear and nonlinear distortion effects are taken into
account to calculate the effective signal-to-noise ratio of each subcarrier.
These results are then employed to optimize the design parameters of
two simple optical filtering structures: a Mach Zehnder interferometer
and a uniform fiber Bragg grating, leading to a significant optical power
budget improvement given by 3.3 and 3dB, respectively. These can be
further increased to 5.5 and 4.2dB respectively when balanced detection
configurations are employed. We find as well that this improvement is
highly dependent on the clipping ratio
