Beam modulation due to thermal deformation of grating in a spectral beam combining system

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 中科院强激光材料重点实验室

	Beam modulation due to thermal deformation of grating in a spectral beam combining system
	Li, Linxin; Chen, Junming; Wang, Leilei; Shao, Jianda; Kong, Fanyu; Jin, Yunxia
刊名	Appl. Optics
	2017
卷号	56 期号:19 页码:5511
通讯作者	yxjin@siom.ac.cn ; jdshao@siom.ac.cn
英文摘要	As the power of a spectral beam combining (SBC) system increases, the temperature of the multilayer dielectric grating (MDG) inevitably rises under the influence of high-power continuous-wave (CW) laser irradiation. Hence, thermal deformation of the MDG occurs, along with degeneration of the combined beam properties. In this study, we experimentally and theoretically investigate the influence of the MDG thermal deformation on the combined beam properties. An experimental setup is first proposed, in which beam quality M-2, beam profile, and MDG wavefront deformation are investigated. The experimental results indicate that the beam quality clearly degrades and the MDG wavefront deformation becomes more significant with increasing pump-CW power density. On this basis, a calculation model for MDG thermal deformation in SBC systems is proposed. The results indicate that MDG wavefront deformation becomes more significant, combined beam profile becomes deformed, and beam quality of the combined beam degrades with increasing power density. Further, thermal expansion of the substrate is a crucial factor that induces MDG wavefront deformation and far-field intensity modulation. .
收录类别	SCI
资助信息	National Natural Science Foundation of China (NSFC) [10704079, 11104295]
WOS记录号	WOS:000404745800051
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/28028]
专题	上海光学精密机械研究所_中科院强激光材料重点实验室
作者单位	中国科学院上海光学精密机械研究所
推荐引用方式 GB/T 7714	Li, Linxin,Chen, Junming,Wang, Leilei,et al. Beam modulation due to thermal deformation of grating in a spectral beam combining system[J]. Appl. Optics,2017,56(19):5511.
APA	Li, Linxin,Chen, Junming,Wang, Leilei,Shao, Jianda,Kong, Fanyu,&Jin, Yunxia.(2017).Beam modulation due to thermal deformation of grating in a spectral beam combining system.Appl. Optics,56(19),5511.
MLA	Li, Linxin,et al."Beam modulation due to thermal deformation of grating in a spectral beam combining system".Appl. Optics 56.19(2017):5511.