Sequential reset method of phase shifter in beam phase control

Yuxin Jiang; Jianfeng Sun; Peipei Hou; Weijie Ren; Lingling Xu; Chaoyang Li; Longkun Zhang; Hanrui Pan; Wendi Gao

doi:10.1117/12.2676243

3 October 2023 Sequential reset method of phase shifter in beam phase control

Yuxin Jiang, Jianfeng Sun, Peipei Hou, Weijie Ren, Lingling Xu, Chaoyang Li, Longkun Zhang, Hanrui Pan, Wendi Gao

Proceedings Volume 12691, Laser Communication and Propagation through the Atmosphere and Oceans XII; 126910Z (2023) https://doi.org/10.1117/12.2676243
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

In the phase control of multiple beams, when multiple phase shifters reach the boundary at the same time, the traditional method is to reset multiple phase shifters at the same time. However, this approach leads to a significant drop in the combined beam optical power. To address this issue, we propose a new reset method. This method resets the phase shifters that reach the boundary at the same time in sequence. It helps to avoid the problems that cause large phase fluctuations and dramatic decreases in optical power. This paper presents the principle of coherent multibeam beam combining and compares the power fluctuations resulting from two different resetting methods. Theoretical derivations and numerical simulations are employed to analyze the effects. The results demonstrate that the sequential reset method yields smaller power jitter compared to the traditional reset method. Furthermore, the suppression of power jitter becomes more pronounced as the number of beams reaching the boundary simultaneously increases. To validate the feasibility of the sequential reset method, an experimental system is constructed. The experimental results reveal a remarkable 36.78% improvement in power stability when compared to the traditional reset method.

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

Citation Download Citation

Yuxin Jiang, Jianfeng Sun, Peipei Hou, Weijie Ren, Lingling Xu, Chaoyang Li, Longkun Zhang, Hanrui Pan, and Wendi Gao "Sequential reset method of phase shifter in beam phase control", Proc. SPIE 12691, Laser Communication and Propagation through the Atmosphere and Oceans XII, 126910Z (3 October 2023); https://doi.org/10.1117/12.2676243

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