Pohle, Dennis;
Barbosa, Fabio A;
Ferreira, Filipe M;
Czarske, Jürgen;
Rothe, Stefan;
(2023)
Intelligent self calibration tool for adaptive few-mode fiber multiplexers using multiplane light conversion.
Journal of the European Optical Society-Rapid Publications
, 19
(1)
, Article 29. 10.1051/jeos/2023020.
Preview |
Text
Ferreira_Intelligent self calibration tool for adaptive few-mode fiber multiplexers using multiplane light conversion_VoR.pdf - Published Version Download (1MB) | Preview |
Abstract
Space division multiplexing (SDM) is promising to enhance capacity limits of optical networks. Among implementation options, few-mode fibres (FMFs) offer high efficiency gains in terms of integratability and throughput per volume. However, to achieve low insertion loss and low crosstalk, the beam launching should match the fiber modes precisely. We propose an all-optical data-driven technique based on multiplane light conversion (MPLC) and neural networks (NNs). By using a phase-only spatial light modulator (SLM), spatially separated input beams are transformed independently to coaxial output modes. Compared to conventional offline calculation of SLM phase masks, we employ an intelligent two-stage approach that considers knowledge of the experimental environment significantly reducing misalignment. First, a single-layer NN called Model-NN learns the beam propagation through the setup and provides a digital twin of the apparatus. Second, another single-layer NN called Actor-NN controls the model. As a result, SLM phase masks are predicted and employed in the experiment to shape an input beam to a target output. We show results on a single-passage configuration with intensity-only shaping. We achieve a correlation between experiment and network prediction of 0.65. Using programmable optical elements, our method allows the implementation of aberration correction and distortion compensation techniques, which enables secure high-capacity long-reach FMF-based communication systems by adaptive mode multiplexing devices.
| Type: | Article |
|---|---|
| Title: | Intelligent self calibration tool for adaptive few-mode fiber multiplexers using multiplane light conversion |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/jeos/2023020 |
| Publisher version: | https://doi.org/10.1051/jeos/2023020 |
| Language: | English |
| Additional information: | © The Authors 2023. Original content in this paper is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10171280 |
Archive Staff Only
 |
View Item |
