# Observing the Effects of Legacy 10G on 100G Channels in Dispersion Managed Optical Systems

## TL;DR

This paper investigates how legacy 10G channels impact 100G channels in dispersion-managed optical systems, revealing noise effects and management strategies for amplitude and phase noise.

## Contribution

It demonstrates the specific noise interactions caused by 10G channels on 100G channels and discusses DSP robustness and guard-band considerations.

## Key findings

- 10G channels induce amplitude and phase noise on 100G channels
- Amplitude noise can be managed as ASE and NLI noise
- DSP robustness influences guard-band requirements

## Abstract

We show that 10G channels generate both amplitude and phase noise on 100G channels. Amplitude noise can be managed as the ASE and NLI noise, while the DSP robustness to the phase noise sets the guard-band.

---
Source: https://tomesphere.com/paper/1901.03373