Work

Minimally invasive topological light manipulation with lensless fiber endomicroscope

Year: 2026

Type: article

Abstract: Topological light fields, with their robust properties, offer transformative potential across photonics. However, achieving flexible manipulation and practical deployment of topological light fields in hard-to-reach areas remains challenging. To overcome this limitation, we propose an adaptive topological light endoscopic system (ATLES) and pioneer an integrated transceiver design based on a multi-core fiber, enabling minimally invasive detection with topological light field manipulation. Leveraging the ATLES framework, we reconfigure a 10,000-core fiber into a high-resolution modulator for phase, amplitude, and coherence control. This enables the on-demand creation of both coherent and incoherent topological light fields, tailored in their structures, directly from a bare fiber tip of just 350 μm in diameter. We demonstrate the power of this approach by performing highly precise rotational velocity measurements under endoscopic conditions, achieving a relative error below 0.055%. Our work establishes a versatile platform for the implementation of topological photonics in hard-to-reach areas, thereby paving the way for their application in biomedical imaging and optical computing. This study presents a 350 μm-wide lensless fiber endoscope that creates tailored topological light and measures rotation with relative errors below 0.055%, enabling precise optical control and sensing in hard-to-reach spaces.

Source: Nature Communications

DOI: 10.1038/s41467-026-78848-4