# Four-dimensional polarization-ring-switching for dispersion-managed optical fibre systems

## TL;DR

This paper investigates a novel four-dimensional polarization-ring-switching format in dispersion-managed optical fiber systems, demonstrating a 25% increase in reach due to its nonlinear tolerance and advanced demapping techniques.

## Contribution

It introduces and evaluates a new 4D polarization-ring-switching format, showing significant performance gains over existing modulation formats in optical fiber systems.

## Key findings

- 25% increase in system reach
- Enhanced nonlinear tolerance of the format
- Effective 4D demapper with correlated noise assumptions

## Abstract

The recently introduced 4D 64-ary polarisation-ring-switching format is investigated in dispersion-managed systems. Numerical simulations show a reach increase of $25\%$ with respect to PM-8QAM. This gain is achieved from the nonlinear tolerance of the format and a 4D demapper using correlated noise assumptions.