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arXiv · 2607.15644

Radially correlated partially coherent beams with a deterministic vortex structure

Xinru Lian·Yaning Zhou·Xin Liu·Zhao Zhang·Qian Chen·Keyu Zhou·Weining Wang·Chunhao Liang·Yangjian Cai·Jingsong Liu
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Abstract

Partially coherent beams have attracted considerable attention due to their intrinsic resilience against complex environmental perturbations. However, the intrinsic wavefront fluctuations make it fundamentally challenging to preserve well-defined orbital angular momentum during propagation. In this work, we propose and experimentally demonstrate a class of radially correlated, partially coherent beams that carry deterministic vortex structures, generated via optical conformal mapping from Cartesian to log-polar coordinates. The resulting beams exhibit a ring-shaped coherence distribution, characterized by low coherence in the radial direction and high coherence in the azimuthal direction. This unique feature of such a beam supports a well-defined deterministic vortex phase, thereby enabling the beam to preserve its ring-shaped coherence distribution during propagation through a focusing system. Our results provide new insights into the design of new partially coherent beams and may facilitate the development of applications in optical encoding, free-space information transmission, and ultrafast light-matter interactions.

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Xinru Lian, Yaning Zhou, Xin Liu, Zhao Zhang, Qian Chen, Keyu Zhou, Weining Wang, Chunhao Liang, Yangjian Cai, Jingsong Liu. 2026-07-17. Radially correlated partially coherent beams with a deterministic vortex structure. https://arxiv.org/abs/2607.15644

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