Advantage of Coherent Optical Transmission System
*High Chromatic Dispersion (CD) Robustness
•Can avoid Dispersion Compensation Units (DCUs)
•No need to have precise Fiber Characterization
•Simpler Network Design
•Latency improvement due to no DCUs
*High Polarization Mode Dispersion (PMD) Robustness
•High Bit Rate Wavelengths deployable on all Fiber types
•No need for “fancy”PMD Compensator devices
•No need to have precise Fiber Characterization
*Low Optical Signal-to-Noise Ratio (OSNR) Needed
•More capacity at greater distances w/o OEO Regeneration
•Possibility to launch lower per-channel Power
•Higher tolerance to Channels Interferences
