Fast transmission matrix measurement of a multimode fiber with common path reference

TL;DR

This paper presents an improved method for measuring the transmission matrix of multimode fibers using a common path reference, enabling efficient light focusing and shaping within the fiber.

Contribution

The authors introduce a novel scheme that co-propagates the reference with the signal, improving measurement accuracy and efficiency for multimode fiber transmission matrices.

Findings

Successful measurement of a 1.6 m multimode fiber guiding 104 LP modes

Enhanced light focusing at the fiber exit

Effective shaping of transmission channels

Abstract

We report an improved scheme for the measurement of the transmission matrix of multimode waveguides in which the reference field co-propagates with the signal wave. The performance of the technique is demonstrated with the measurement of a 1.6 m long multimode optical fiber guiding 104 LP modes at 1064nm. The transmission matrix permitted efficient focusing of the light delivered at the fiber exit as well as shaping in the fiber transmission channels.