10 kW rectangular laser beam generation with incoherent space combiner | |
Tian, Xiao2,3; Bai, Yang3; Lei, Guangzhi1; Yu, Lidong3; Zhou, Jingfeng3; Li, Ben3; Wang, Yi3 | |
刊名 | Optik |
2022-06 | |
卷号 | 260 |
关键词 | Incoherent space laser beam combination 10 kW beam combiner Rectangular uniform beam spot Multi-beam laser volumetric heat source Finite element methods Optical lens Thermo-mechanical properties |
ISSN号 | 00304026 |
DOI | 10.1016/j.ijleo.2022.169011 |
产权排序 | 3 |
英文摘要 | In this paper, we report an incoherent space laser beam combiner for rectangular beam combination with 18 fiber-transmitted semiconductor lasers at 972 nm wavelength. The coupled thermo-mechanical properties of all the optical lenses in the combiner were analyzed to evaluate the long-term reliability of the combiner subjected to beyond 10 kW high-power laser irradiation. An experiment-based numerical model was developed on the basis of the multi-beam laser volumetric heat source, and the performance of lenses irradiated by 10 kW combined laser for 1000 s was studied with finite element method (FEM). The maximum temperature among all lenses was 427.27 K which is much lower than the softening point temperature of fused silica material made of lenses. And the 0.1 aperture number corresponding to the maximum thermal deformation of 4.53 µm is much smaller than the conventional optical lens processing tolerance. The maximal stress of 12.73 MPa is far less than the yield stress of 4.5 GPa for the material. The manufactured laser beam combiner realized a highest output power of 10.641 kW at a power combination efficiency of 98.5%, a combination length of 200 mm and a rectangular focal beam spot of 30 mm × 10 mm. Our method provides a valuable choice for realizing fast and flexible laser surface heat treatment. © 2022 Elsevier GmbH |
语种 | 英语 |
出版者 | Elsevier GmbH |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/95847] |
专题 | 西安光学精密机械研究所_空间光学应用研究室 |
通讯作者 | Bai, Yang |
作者单位 | 1.Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China 2.School of Science, Xi'an Aeronautical University, Xi'an; 710077, China; 3.National Key Laboratory of Photonics and Photon-Technology, Northwest University, Xi'an; 710127, China; |
推荐引用方式 GB/T 7714 | Tian, Xiao,Bai, Yang,Lei, Guangzhi,et al. 10 kW rectangular laser beam generation with incoherent space combiner[J]. Optik,2022,260. |
APA | Tian, Xiao.,Bai, Yang.,Lei, Guangzhi.,Yu, Lidong.,Zhou, Jingfeng.,...&Wang, Yi.(2022).10 kW rectangular laser beam generation with incoherent space combiner.Optik,260. |
MLA | Tian, Xiao,et al."10 kW rectangular laser beam generation with incoherent space combiner".Optik 260(2022). |
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