Improved dispersion tolerance of Miller coding by integrating duobinary coding
A MillerDuobinary coding scheme is proposed to increase optical transmission distance by compressing the optical spectrum compared with that of Miller coding and thereby demonstrating much larger tolerance against fiber dispersion. In this modulation scheme we investigate the dispersion tolerance of this code and found it to be nearly twice that of Miller coding only by employing single photodetector at 1dB power penalty. The transmission reach can further be extended for higher power penalty. The circuit complexity of the proposed scheme is comparable to traditional Duobinary coding. The dispersion tolerance of MillerDuobinary code obtained at 3dB power penalty is \(-971\) to \(+964\)ps/nm.
millerduobinary modulation format optical communication optical fiber