激光聚变驱动器的光束相干性及其控制：回顾与展望

魏晓峰; 李平

doi:10.11884/HPLPB202032.200203

激光聚变驱动器的光束相干性及其控制：回顾与展望

doi: 10.11884/HPLPB202032.200203

魏晓峰,
李平

中国工程物理研究院激光聚变研究中心，四川绵阳 621900

基金项目: 中国工程物理研究院院长基金项目（YZ1602）

详细信息

作者简介:
魏晓峰（1960—），男，研究员，主要从事高功率激光技术研究；xfwei@caep.cn

中图分类号: O532
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- 被引次数: 0
出版历程
- 收稿日期: 2020-07-14
- 修回日期: 2020-09-14
- 刊出日期: 2020-11-19

Beam coherence and control of laser fusion driver: Retrospect and prospect

Laser Fusion Research Center, CAEP, Mianyang 621900, China

摘要

摘要: 高功率强激光与物质相互作用蕴藏着丰富的非线性效应，激光聚变驱动器的光束具有高度相干性，它在光束传输过程中极大地凸显了这种效应，并不可避免地制约着激光功率的提升和激光能量的有效利用。回顾激光聚变驱动器的发展史，在提升激光输出能力的主线外，还存在一条与光束相干性做斗争的暗线贯穿其中。以激光与物质相互作用为牵引，从高功率强激光传输中非线性效应抑制和激光等离子体相互作用的抑制两方面回顾了激光聚变驱动器光束相干性的控制现状，并针对潜在需求，展望了未来高功率激光发展的创新技术。
- 高功率激光 /
- 光束相干性 /
- 激光聚变驱动器 /
- 强激光传输动力学 /
- 光束匀滑
Abstract: There are many kinds of nonlinear effects in the interaction between high power laser and matter. The beam of laser fusion driver is highly coherent, which greatly enhances the nonlinear effects, and inevitably limits the laser power and efficient utilization. Looking back on the development history of laser fusion driver, there is a dark line runing through the main line of improving laser output capability, which is struggling with beam coherence. The control status of beam coherence in laser fusion driver is reviewed from two aspects: restraining the nonlinear transmission effect of high power laser and suppressing the interaction between laser and plasma. In view of the potential demand, innovative technologies for the future development of high power lasers are proposed.
- high power laser /
- beam coherence /
- laser fusion driver /
- dynamics of intense laser transmission /
- beam smoothing

HTML全文

图 1 TSBS效应造成的熔石英元件的损伤裂纹

Figure 1. Damage and crack of fused silica optics caused by transverse stimulated Raman scattering (TSBS) effect

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图 2 强激光SRRS效应形成的典型散射光谱

Figure 2. Typical scattering spectra by stimulated rotational Raman scattering (SRRS) effect of intense laser

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图 3 TSRS效应造成的三倍频晶体元件双肺模式的体损伤

Figure 3. Damage of crystal optics in dual lung mode caused by TSRS effect

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图 4 自聚焦效应造成打靶透镜元件成丝损伤

Figure 4. Filament damage of lens caused by self-focusing effect

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图 5 CPP面形设计及对应的焦斑分布

Figure 5. Schematic diagram of CPP technology and its corresponding focal plane irradiance

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图 6 基于光束近场和远场全域对应关系的SSD技术

Figure 6. Schematic diagram of far field and near field global correspondence based on SSD technology

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图 7 基于偏振优化控制实现具有混合偏振的丝斑分布示意图

Figure 7. Schematic diagram of mixed polarization state in the far field based on polarization optimization control

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