高能激光系统的物理与工程

J. Emmett
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摘要

劳伦斯利弗莫尔实验室积极参与高功率激光系统的发展,用于核聚变研究。在近期和中期应用中,选择了钕玻璃激光器,因为它代表了产生高功率脉冲的最佳技术。然而,需要广泛的研究和发展来优化激光,以提供最大功率的小直径聚变目标。激光玻璃和无源光学元件的非线性折射率深刻影响着系统的性能,需要采用全新的方法来设计这类激光器。新的光学材料也正在开发,预计将大大提高这类激光系统的性能。三个主要的钕玻璃激光系统正在运行或正在建造中,这些系统已经通过技术开发计划成为可能。表1给出了这些系统。
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Physics and engineering of high-power laser systems
The Lawrence Livermore Laboratory is heavily involved in the development of high-power laser systems for applications in fusion research. For near and intermediate term applications the neodymium-glass laser was chosen as it represented the best available technology for the production of high-power pulses. However, extensive research and development have been required to optimize the laser to deliver maximum power to small diameter fusion targets. The nonlinear refractive index of the laser glass and passive optical elements profoundly influence system performance, necessitating an entirely new approach to the design of such lasers. New optical materials are also being developed which are expected to improve substantially the performance of this class of laser systems. Three major neodymium-glass laser systems are operating or under construction at LLL which have been made possible by the technology development program. These systems are given in Table I.
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