Joint Subcarrier Phase Recovery for Nonlinearity Mitigation

TL;DR

This paper introduces a low-complexity phase recovery method that effectively reduces laser phase noise and fiber nonlinearity in multi-subcarrier optical communication systems, improving performance with minimal computational effort.

Contribution

It presents a novel joint subcarrier phase recovery scheme that mitigates both laser phase noise and fiber nonlinearity simultaneously, with low computational complexity.

Findings

Achieves 0.9 dB gain in a long single-span link with Raman amplification.

Requires only 99 real multiplications per complex symbol.

Demonstrates effective nonlinearity mitigation in optical communication.

Abstract

We propose a low-complexity phase recovery scheme that simultaneously mitigates laser phase noise and fiber nonlinearity across several subcarriers. In a long single-span link with Raman amplification, the scheme achieves 0.9 dB gain with 99 real multiplications per complex symbol.