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Beam nonuniformity compensating by the programmable spatial shaper for the integration test bed
Author(s): Junpu Zhao; Yue Liang; Sen Li; Zhaoyu Zong; Jun Tang; Wenyi Wang; Ping Li; Runchang Zhao; Fa Zeng; Yanwen Xia; Lin Chen; Bo Chen; Kuixing Zheng; Xiaofeng Wei; Qihua Zhu
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Paper Abstract

The Integration Test Bed (ITB) is a large-aperture single-beam Nd:glass laser system, built to demonstrate the key technology and performance of the laser drivers. The phase II designed output of the ITB at 1053nm is 18.2kJ with the peak power of 3.6TW. So it is important to keep a flat spatial intensity profile at the end of the system to avoid optical elements damage or small-scale self-focusing. Applying the Liquid Crystal Programmable Spatial Shaper (LCPSS) to compensate the beam non-uniformity related to amplification and transmission is an effective way at present. In this paper, we attempt to pre-compensate the beam nonuniformity by the LCPSS. Experiments were carried out to study the spatial fluence modulation and contrast improvement at the main laser output of the ITB laser facility. The results show that the peak-to-average fluence modulation in the near-field is typically 1.35:1; the contrast is about 0.08, at the designed energy and power, which meet the modulation less than 1.4:1 and the contrast under 0.1 design requirement.

Paper Details

Date Published: 24 January 2019
PDF: 8 pages
Proc. SPIE 11052, Third International Conference on Photonics and Optical Engineering, 110521R (24 January 2019); doi: 10.1117/12.2524006
Show Author Affiliations
Junpu Zhao, China Academy of Engineering Physics (China)
Yue Liang, China Academy of Engineering Physics (China)
Sen Li, China Academy of Engineering Physics (China)
Zhaoyu Zong, China Academy of Engineering Physics (China)
Jun Tang, China Academy of Engineering Physics (China)
Wenyi Wang, China Academy of Engineering Physics (China)
Ping Li, China Academy of Engineering Physics (China)
Runchang Zhao, China Academy of Engineering Physics (China)
Fa Zeng, China Academy of Engineering Physics (China)
Yanwen Xia, China Academy of Engineering Physics (China)
Lin Chen, China Academy of Engineering Physics (China)
Bo Chen, China Academy of Engineering Physics (China)
Kuixing Zheng, China Academy of Engineering Physics (China)
Xiaofeng Wei, China Academy of Engineering Physics (China)
Qihua Zhu, China Academy of Engineering Physics (China)


Published in SPIE Proceedings Vol. 11052:
Third International Conference on Photonics and Optical Engineering
Ailing Tian, Editor(s)

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