Yu Xin, Wang Xingyue, Liang Jing, Liu Cai, Ni Xiaolong, Bai Suping, Li Jiasu, Liu Zeping, Hou Lijie
School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China.
Railway Locomotive and Rolling Stock Faculty, Jilin Railway Technology College, Jilin 132299, China.
Micromachines (Basel). 2024 Dec 30;16(1):38. doi: 10.3390/mi16010038.
In this paper, we present a method based on the conjugate image principle and micro-nano optics to detect tilt aberrations of a phased fiber laser array system. A co-aperture optics system was adapted to detect the tilt aberrations of a seven-element phased fiber laser array system simultaneously. A Kepler telescope was designed to construct the conjugate relation between the exit pupil of a fiber optic laser array system and a microlens array and also to match the size of the seven beams and the microlens array. The apochromatic theory was used to meet the multispectral (1064 ± 0.3 nm, 1030 ± 0.3 nm, and 633 ± 0.2 nm) detection needs. A far-field detection unit was also designed to evaluate beam quality. When the actual beam was offset by 1 pixel, the beam tilt was about 0.7 µrad. The maximum detection error of the seven-element system was about 7 µrad. It could not only directly detect the beam's tilt angle but also maintained detection accuracy while reducing the algorithm complexity.
在本文中，我们提出了一种基于共轭成像原理和微纳光学的方法来检测相控光纤激光器阵列系统的倾斜像差。采用共孔径光学系统同时检测七元相控光纤激光器阵列系统的倾斜像差。设计了一台开普勒望远镜，用于构建光纤激光器阵列系统出瞳与微透镜阵列之间的共轭关系，同时匹配七束光与微透镜阵列的尺寸。利用复消色差理论满足多光谱（1064±0.3nm、1030±0.3nm和633±0.2nm）检测需求。还设计了一个远场检测单元来评估光束质量。当实际光束偏移1个像素时，光束倾斜约为0.7微弧度。七元系统的最大检测误差约为7微弧度。它不仅可以直接检测光束的倾斜角度，还能在降低算法复杂度的同时保持检测精度。
