Data centre optical wireless downlink with WDM and multi-access point support

TL;DR

This paper presents a high-speed optical wireless data centre downlink using WDM with RYGB laser diodes and multi-access points, employing innovative receiver designs for improved performance.

Contribution

It introduces a WDM scheme with RYGB laser diodes and evaluates novel receiver configurations for multi-rack data centre communication.

Findings

High data rates achieved with RYGB LDs and WDM

Improved SINR for each rack with proposed setup

Effective multi-access communication with simple modulation

Abstract

The ability to provide very high data rates is a significant benefit of optical wireless communication (OWC) systems. In this paper, an optical wireless downlink in a data centre that uses wavelength division multiple access (WDMA) is designed. Red, yellow, green and blue (RYGB) laser diodes (LDs) are used as transmitters to provide a high modulation bandwidth. A WDMA scheme based on RYGB LDs is used to provide communication for multiple racks at the same time from the same light unit. Two types of optical receivers are examined in this study; an angle diversity receiver (ADR) with three branches and a 10 pixel imaging receiver (ImR). The proposed data centre achieves high data rates with a higher signal-to-interference-plus-noise ratio (SINR) for each rack while using simple on-off-keying (OOK) modulation.