Generation of optical vortex lattices by a coherent beam combining system

Jinhu Long; Tianyue Hou; Qi Chang; Tao Yu; Rongtao Su; Rongtao Su; Pengfei Ma; Yanxing Ma; Pu Zhou; Pu Zhou; Lei Si; Lei Si

doi:10.1364/OL.425186

Optics Letters
Vol. 46,
Issue 15,
pp. 3665-3668
(2021)
•https://doi.org/10.1364/OL.425186

Generation of optical vortex lattices by a coherent beam combining system

Jinhu Long, Tianyue Hou, Qi Chang, Tao Yu, Rongtao Su, Pengfei Ma, Yanxing Ma, Pu Zhou, and Lei Si

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Jinhu Long, Tianyue Hou, Qi Chang, Tao Yu, Rongtao Su, Pengfei Ma, Yanxing Ma, Pu Zhou, and Lei Si, "Generation of optical vortex lattices by a coherent beam combining system," Opt. Lett. 46, 3665-3668 (2021)

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Abstract

Owing to the unique features in intensity and phase structures, optical vortex lattices (OVLs) have attracted intensive attention and promoted various applications. However, the power scaling of OVLs always presents a critical challenge. Here we take advantage of the brightness enhancement of coherent beam combining (CBC) technology and propose an architecture for creating OVLs based on the CBC system. In the experiment, by utilizing the stochastic parallel gradient descent algorithm, the dynamic phase noises were compensated. The desired piston phase shifting of each element for tailoring the structured wavefront was implemented by the liquid crystal. When the system in a closed loop, hexagonal close-packed OVL consists of spatially distributed orbital angular momentum, beams can be generated in the far-field. This work is an important step toward future implementation of high-power structured light beams.

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Supplementary Material (3)

Name	Description
Visualization 1	Illustration of customizing the number and arrangement of the OAM beams by modulating the fill-factor of the laser array at the source plane.
Visualization 2	Optimization procedure of the CBC architecture for tailoring OVLs.
Visualization 3	Intensity evolution of the combined optical field observed by the CCD2.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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