Research on orbital angular momentum mode adaptive control theory in large mode area fiber based on the 5×1 photonic lantern

Hao Yang; Zongfu Jiang; Wenguang Liu; Qiong Zhou; Jiangbin Zhang; Yao Lu

doi:10.1117/12.2692056

6 November 2023 Research on orbital angular momentum mode adaptive control theory in large mode area fiber based on the 5×1 photonic lantern

Hao Yang, Zongfu Jiang, Wenguang Liu, Qiong Zhou, Jiangbin Zhang, Yao Lu

Author Affiliations +

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 129215A (2023) https://doi.org/10.1117/12.2692056
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

Adaptive mode control system based on photonic lanterns has been made great progress in achieving stable fundamental mode in large mode area fiber, but there are still difficulties in generating specific spatial mode, such as orbital angular momentum mode. In this paper, purity of the target mode which is obtained by optical correlation filtering method based on computational holograms is chosen to be the evaluation function of the stochastic parallel gradient descent algorithm. The schematic diagram of the adaptive mode control system is improved, which consists of the photonic lantern, phase modulators, optical correlation filtering, detector, controller, etc. A simulation model combining optical correlation filtering method based on computational hologram and stochastic parallel gradient descent algorithm is established, and the numerical simulation results show that the orbital angular momentum mode with topological charge of ±1 and ± 2 is realized, and the corresponding mode purity is above 95% by using this adaptive mode control method based on a 5×1 photonic lantern.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Hao Yang, Zongfu Jiang, Wenguang Liu, Qiong Zhou, Jiangbin Zhang, and Yao Lu "Research on orbital angular momentum mode adaptive control theory in large mode area fiber based on the 5×1 photonic lantern", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 129215A (6 November 2023); https://doi.org/10.1117/12.2692056

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KEYWORDS

Control systems

Optical filters

Tunable filters

Adaptive control

Multimode fibers

Spatial light modulators

Angular momentum

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