Electronic dispersion compensation using full optical-field reconstruction in 10Gbit/s OOK based systems.

Area of Science:

• Optical Communications
• Signal Processing
• Photonics

Background:

• 10Gbit/s on-off keyed transmission systems are often limited by optical signal-to-noise ratio (OSNR).
• Traditional optical dispersion compensation methods can be costly and complex.
• Electronic dispersion compensation (EDC) offers a potential alternative for managing signal impairments.

Purpose of the Study:

• To investigate the design of electronic dispersion compensation (EDC) using full optical-field reconstruction.
• To achieve significant transmission distances without optical dispersion compensation in 10Gbit/s systems.
• To enhance the tolerance of EDC schemes to system parameter variations.

Main Methods:

• Full optical-field reconstruction for EDC in 10Gbit/s on-off keyed systems.
• Suppression of low-frequency component amplification in phase reconstruction.
• System configuration design to mitigate fiber nonlinearity and thermal noise.
• Numerical investigation of performance sensitivity to system parameters.

Main Results:

• A 4.8dB OSNR margin was achieved for 2160km single-mode fiber transmission without optical dispersion compensation.
• Effective suppression of impairments related to low-frequency amplification, fiber nonlinearity, and thermal noise.
• A novel method was proposed to enhance tolerance to differential phase misalignment in asymmetric Mach-Zehnder interferometers.

Conclusions:

• Full optical-field EDC is a viable and potentially cost-effective solution for dispersion compensation.
• The study provides crucial design guidelines for implementing EDC in future transparent optical networks.
• Optimized EDC design can significantly improve OSNR margins and transmission reach in high-speed optical systems.