The radial memory effect in multimode optical fibres

2025/08/15 by Ulas Gokay (22085993), Ulas Gokay, Robert J. Kilpatrick (22085996) +12 · 1 voice
Engineering · Materials Science · Physics and Astronomy · #Glass properties and applications #Optical Network Technologies #Photonic Crystal and Fiber Optics #physics.optics

paper · pdf · doi:10.48550/arxiv.2508.11389

openalex publication_date 2025/08/19 · openalex created_date 2025/12/10 · openalex updated_date 2026/07/14

Abstract

We present a study of a novel memory effect in multimode optical fibres, which manifests itself as an output ring of excess energy at the same radius as an input focussed spot. This effect is robust against fibre perturbations, and we discuss its possible use for spatial multiplexing.

Discussions

• New paper on #ArXiv! When (coherent) light propagates in a multimode fibre, each mode accumulates a slightly different phase, so the output looks like a random speckle patter. But it is NOT random! (v [bsky, 16 points, 3 comments]

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