Generating vortex beams by transforming near-field coordinates of coherent beam combining system
Year: 2025
Type: article
Abstract: In this study, we introduce a method of generating vortex beams based on coherent beam combining (CBC) configuration. By utilizing a pair of static optical elements with specific phase distributions, the near-field of array beams is transformed from Cartesian to polar coordinate. After the converted light field is focused, the focal point is associated with the wavefront. With the aid of CBC configuration and active phase control, it is easy to switch orbital angular momentum (OAM) modes by controlling the position of focal point. Hence, the OAM modes can be measured and generated simultaneously. The performance of the method has been numerically explored, and different OAM modes including integer and fraction topological charge have been generated efficiently.
Source: Optics Express
DOI: 10.1364/oe.558291
Authors: Hongxiang Chang, Xingliang Xie, Wenguo Zhu, Bowang Shu, Yuqiu Zhang, Pu Zhou, Zhe Chen
Institution: National University of Defense Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G1720441513, G4714043537
OpenAlex ID: W4408568781