Experimental Investigation of Mode Diversity Reception Using an Optical Turbulence Generator and Digital Holography

TL;DR

This paper experimentally investigates mode diversity reception in turbulent optical conditions, demonstrating improved fiber coupling efficiency and reduced coupling loss by utilizing multiple modes with digital holography and turbulence simulation.

Contribution

It introduces an experimental setup combining optical turbulence generation and digital holography to analyze mode diversity reception, highlighting the benefits of multi-mode fibers under turbulence.

Findings

Multi-mode fibers improve coupling efficiency under turbulence.

Digital holography enables effective mode demultiplexing.

Coupling loss decreases with mode diversity.

Abstract

Mode diversity reception is experimentally investigated using an optical turbulence generator, off-axis digital holography, and digital demultiplexing. The results confirm improved fibre coupling efficiency when receiving the optical field using a multi-mode fibre instead of a single-mode fibre under turbulent conditions, specifically beam wander. The coupling loss is reduced by receiving additional modes.