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arXiv · 2611.04427

Reference-Beam-Assisted Perturbation-Resistant Imaging Through A Single Multimode Fiber

Bowen Sun·Maohan Li·Jingwei Luo·Zhuoren Wan·Zhaoyang Wen·Yuan Chen·Wending Huang·Zijian Wang·Ming Yan·Heping Zeng
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Abstract

Multimode fiber (MMF) imaging is highly sensitive to mechanical perturbations, which alter modal coupling and disrupt the speckle-to-target mapping. Here, we propose a reference-beam-assisted method for image reconstruction across multiple fiber configurations. An independent reference beam propagates through the same MMF as the imaging signal without target modulation, providing target-independent transmission-state information through its speckle patterns without requiring a separate configuration-sensing structure. A neural network jointly processes the signal and reference speckles to reconstruct target images. Experiments with MNIST and Fashion-MNIST across 10 fiber configurations demonstrate improved reconstruction quality, faster training convergence, and more accurate configuration identification. Further evaluation across 40 configurations confirms the reconstruction benefit of reference-beam assistance over a larger set of perturbed fiber states. These results provide a foundation for developing perturbation-adaptive MMF imaging systems for flexible endoscopy and minimally invasive optical diagnostics.

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Bowen Sun, Maohan Li, Jingwei Luo, Zhuoren Wan, Zhaoyang Wen, Yuan Chen, Wending Huang, Zijian Wang, Ming Yan, Heping Zeng. 2026-11-03. Reference-Beam-Assisted Perturbation-Resistant Imaging Through A Single Multimode Fiber. https://arxiv.org/abs/2611.04427

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