# Experimental Demonstration of Eight-dimensional Modulation Formats for Long-haul Optical Transmission

## TL;DR

This paper experimentally demonstrates two new 8-dimensional modulation formats for long-haul optical transmission, achieving higher reach and nonlinear tolerance compared to existing formats, thus advancing optical communication capabilities.

## Contribution

The paper introduces two novel 5.5 bit/4D modulation formats and experimentally validates their superior reach and nonlinear tolerance over standard PM-8QAM in long-distance transmission.

## Key findings

- 29.4% reach increase over PM-8QAM
- Enhanced nonlinear tolerance
- Successful experimental demonstration over 9680 km

## Abstract

Two novel 5.5 bit/4D modulation formats are experimentally demonstrated to transmit over 9680 km of SSMF. A reach increase of 29.4% over the 6 bit/4D PM-8QAM is shown. Furthermore, increased nonlinear tolerance with respect to PM-8QAM is shown.