Influence of the 400mm-aperture Nd:glass slab-amplifier gain nonuniformity on 1w(1053nm) near-field performance

Wen-yi Wang; Yuan-Chao Geng; Lin Chen; Yi-ming Luo; Yuan-bin Chen; Jun-pu Zhao; Wan-qing Huang; Ying Zhang; Lan-qin Liu; Kui-xing Zheng; Qi-Hua Zhu; Xiao-feng Wei

doi:10.1117/12.2034689

17 September 2013 Influence of the 400mm-aperture Nd:glass slab-amplifier gain nonuniformity on 1ω(1053nm) near-field performance

Wen-yi Wang, Yuan-Chao Geng, Lin Chen, Yi-ming Luo, Yuan-bin Chen, Jun-pu Zhao, Wan-qing Huang, Ying Zhang, Lan-qin Liu, Kui-xing Zheng, Qi-Hua Zhu, Xiao-feng Wei

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Proceedings Volume 8904, International Symposium on Photoelectronic Detection and Imaging 2013: High Power Lasers and Applications; 89041E (2013) https://doi.org/10.1117/12.2034689
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

optical propagation simulation by SG99 code and invert algorithm has been made for two typical laser architecture, namely the National Ignition Facility (model A) and SG-III laser facility (model B) based on measured 400mm aperture Nd:glass slab gain distribution data on ITB system. When the gain nonuniformity is about 5%, 7%, and 9% respectively within 395x395mm² aperture and output beam aperture is 360x360mm², and output energy is about 16kJ/5ns(square) with B-integral limited, 1ω(1053nm) nearfield modulation is about 1.10, 1.15, and 1.30 respectively for model A (11+7 slab configuration), and 1.07, 1.08, and 1.17 respectively for model B (9+9 slab configuration) without spatial gain compensation. With the above three gain nonuniformity and slab configuration unchanged, to achieve flat-in-top output near field, the compensation depth of the input near field is about 1.5:1, 2.0:1, and 6.0:1 respectively for model A, and 1.3:1, 1.4:1, and 3.5:1 respectively for model B. Compared with model A (the beam aperture unchanged in multi-pass amplification), the influence of slab gain nonuniformity on model B (beam aperture changed) is smaller. All the above simulation results deserve further experiment study in the future.

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Wen-yi Wang, Yuan-Chao Geng, Lin Chen, Yi-ming Luo, Yuan-bin Chen, Jun-pu Zhao, Wan-qing Huang, Ying Zhang, Lan-qin Liu, Kui-xing Zheng, Qi-Hua Zhu, and Xiao-feng Wei "Influence of the 400mm-aperture Nd:glass slab-amplifier gain nonuniformity on 1ω(1053nm) near-field performance", Proc. SPIE 8904, International Symposium on Photoelectronic Detection and Imaging 2013: High Power Lasers and Applications, 89041E (17 September 2013); https://doi.org/10.1117/12.2034689

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