Simulation and Experimental Studies of DWDM Nonlinear Phase/Polarization/Power Crosstalk Between DFOS and Communication Channels in 27.6-Tb/s 800ZR Metro Network

TL;DR

This paper investigates fiber nonlinearity crosstalk in high-capacity DWDM networks, demonstrating that pulse-compression DAS is compatible with legacy transceivers, unlike conventional pulse-based DAS.

Contribution

It provides a comprehensive analysis of nonlinear crosstalk effects and experimentally compares pulse-based and pulse-compression DAS in a 27.6-Tb/s DWDM system.

Findings

Conventional pulse-based DAS causes significant crosstalk penalties.

Pulse-compression DAS exhibits negligible penalties with legacy transceivers.

Experimental validation in an 800-Gb/s, 90-km setup supports the analysis.

Abstract

We comprehensively analyze the fiber nonlinearity crosstalks between DAS and communication channels through numerical results and 40 x 800-Gb/s 90-km experimental demonstration. Our findings indicate that conventional pulse-based DAS is unsuitable for in-band DWDM coexistence system, whereas pulse-compression DAS shows negligible penalties with legacy coherent transceivers.