Open AccessOptical filtering in directly modulated/detected OOFDM systems
Author(s) -
Christian Sánchez,
B. Ortega,
Jinlong Wei,
J. Capmany
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.030591
Subject(s) - optics , fiber bragg grating , optical power , subcarrier multiplexing , distortion (music) , interferometry , multiplexing , optical filter , filter (signal processing) , subcarrier , optical fiber , materials science , physics , computer science , orthogonal frequency division multiplexing , telecommunications , channel (broadcasting) , laser , bandwidth (computing) , amplifier , computer vision
This work presents a theoretical investigation on the performance of directly modulated/detected (DM/DD) optical orthogonal frequency division multiplexed (OOFDM) systems subject to optical filtering. 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.