A unidirectional two-pulse amplifying architecture for laser fusion facilities

Min Li; Xiaomin Zhang; Wenyi Wang; Zhenguo Wang; Xiongwei Yan; Xinying Jiang; Jiangang Zheng; Mingzhong Li

doi:10.1117/12.2228531

26 January 2016 A unidirectional two-pulse amplifying architecture for laser fusion facilities

Min Li, Xiaomin Zhang, Wenyi Wang, Zhenguo Wang, Xiongwei Yan, Xinying Jiang, Jiangang Zheng, Mingzhong Li

Proceedings Volume 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015; 97962D (2016) https://doi.org/10.1117/12.2228531
Event: Selected Proceedings of the Chinese Society for Optical Engineering Conferences held November 2015, 2015, Various, China

Abstract

A unidirectional two-pulse amplifying architecture (UTPA) was proposed to amplify the laser pulses in inertial confinement fusion and fusion energy facilities. Compared with laser output performance in the conventional single pulse amplifier (SPA), the preliminary results show that although the performance in SPA and UTPA with the gain media of Yb:YAG operating at 200K are almost equal with output energies of 8.12 kJ and 8.26 kJ, and extraction efficiencies of 79.5% and 81.4%, respectively; however, at the maximum output in SPA, ΣB increases up to 3.499 rad close to the limitation of 3.5 rad, while in UTPA ΣB is relative small with the value of 1.769 rad, which reduces the nonlinear effects for high power pulses and is beneficial to system reliability and stability. In addition, for achieving a pulse with squared temporal shape, the demands for the pre-shaping ability of the laser system were significantly reduced in UTPA by around 6 times. With ΣB margins in UPTA, it is possible to scale the output performance with high extraction efficiency by increasing the gain coefficient or the slaps.

Citation Download Citation

Min Li, Xiaomin Zhang, Wenyi Wang, Zhenguo Wang, Xiongwei Yan, Xinying Jiang, Jiangang Zheng, and Mingzhong Li "A unidirectional two-pulse amplifying architecture for laser fusion facilities", Proc. SPIE 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015, 97962D (26 January 2016); https://doi.org/10.1117/12.2228531

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