DPAL activities in Japan: update

DPAL activities in Japan: update
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日本的 DPAL 活动:更新

DOI:
10.1117/12.2653852
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发表时间:
2023
期刊:
Proceedings of SPIE
影响因子:
--
通讯作者:
Fumio Wani
Fumio Wani
中科院分区:
--
文献类型:
--
作者:
Masamori Endo;Hiroki Nagaoka;Fumio Wani

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介绍了日本二极管泵浦碱金属激光器(DPAL)的最新进展。自上次在成都的演讲以来,我们一直在继续我们的DPAL研究,主要目标是开发未来扩大规模和高效运营的工具。特别是,重点是结合计算流体动力学(CFD)和波动光学的数值模拟。为了验证模拟结果与实验结果的一致性,我们设计并建造了几个实验装置。我们最新的气流型DPAL基于吸收的泵浦光产生15.5 W的输出功率和80%的斜率效率。与理论预测的协议是优秀的,不仅输出功率,而且横模形状和光束质量。此外,为了准确预测Cs DPAL的性能,我们测量了主要的反应截面,即Cs的两个P态与各种烃缓冲气体的混合和猝灭反应截面。讨论了利用腔倒空技术实现重复脉冲运转的主要结果和数值模拟。
Activities on diode pumped alkali laser (DPAL) in Japan are updated. Since the last presentation in Chengdu, we have continued our DPAL research mainly targeting the development of tools for future scaling-up and high-efficiency operation. In particular, the focus is on a numerical simulation that combines computational fluid dynamics (CFD) and wave optics. To confirm the agreement between the experimental and simulation results, we designed and built several experimental apparatuses. Our latest gas-flow type DPAL produced 15.5 W output power with 80% slope efficiency based on the absorbed pump light. The agreement with theoretical prediction was excellent not only for output power but also for transverse mode shape and beam quality. Additionally, to accurately predict the performance of Cs DPAL, we measured the main reaction cross sections, namely, mixing and quenching reaction cross sections of the two P states of Cs with various hydrocarbon buffer gases. The main result of the repetitive pulsed operation by the cavity dumping technique and relevant numerical simulation is also discussed.
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