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惯性约束聚变激光驱动装置用大尺寸偏振薄膜研究综述

Research Progress on Large Size Polarizer Coating for Inertial Confinement Fusion Laser Application

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摘要

激光偏振薄膜通常用作光开关或隔离元件,在我国神光(SG)装置、美国国家点火装置(NIF)[1]、法国兆焦耳装置(LMJ)[2]等惯性约束聚变(ICF)领域的大型高功率激光装置中起着至关重要的作用,其性能甚至影响整个激光装置的构型[1]。应用于高功率激光系统的偏振薄膜需具备优异的光谱性能、高的激光损伤阈值(LIDT)和低的膜层应力。偏振薄膜需要在足够宽的光谱区域内同时具备高的p偏振光透射率和高的消光比[1-3]。为了满足这一光谱性能要求,偏振薄膜通常包含30层以上的高、低折射率交替的膜层,膜层总厚度不少于4 μm。为了满足综合性能要求,有的偏振薄膜厚度甚至达到8 μm以上。与一般的反射薄膜相比,偏振薄膜由于膜层较厚,激光损伤阈值总体偏低,尤其是p偏振光的激光损伤阈值较低。由于p偏振光具有较高的透射率,因此整个膜层及基底的缺陷都会影响p偏振光的激光损伤阈值。较厚的膜层还增加了应力的控制难度,膜层应力引起的膜层龟裂问题是偏振薄膜研究中曾面临的主要技术难题之一[4-5]。正是由于尺寸大(对角线接近1 m),膜层厚度、均匀性控制要求和激光损伤阈值要求高,偏振薄膜被认为是激光聚变装置中研制难度最高的薄膜元件[6]。

Abstract

This paper reviews the research progress of polarizer coating for laser application, mainly related to the study on spectral performance, laser induced damage threshold, and coating stress. The work done by researchers at Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences to achieve the requirements of large size polarizer coating for Inertial Confinement Fusion (ICF) laser application is introduced. The research progress on coating material design, coating design, and coating preparation are also introduced. Large size polarizer coating has been developed and successfully applied to large-scale laser facilities, including SG series high-power laser and ultra-short laser devices.

Newport宣传-MKS新实验室计划
补充资料

DOI:10.3788/AOS201939.1000001

所属栏目:综述

基金项目:国家“万人计划”青年拔尖人才计划、上海市青年拔尖人才计划、中国科学院青年创新促进会资助项目;

收稿日期:2019-05-13

修改稿日期:2019-06-10

网络出版日期:2019-10-01

作者单位    点击查看

邵建达:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
朱美萍:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
李静平:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
孙建:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
赵元安:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800
易葵:中国科学院上海光学精密机械研究所薄膜光学实验室, 上海 201800

联系人作者:邵建达(jdshao@siom.ac.cn); 朱美萍(bree@siom.ac.cn);

备注:国家“万人计划”青年拔尖人才计划、上海市青年拔尖人才计划、中国科学院青年创新促进会资助项目;

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引用该论文

Jianda Shao,Meiping Zhu,Jingping Li,Jian Sun,Yuan′an Zhao,Kui Yi. Research Progress on Large Size Polarizer Coating for Inertial Confinement Fusion Laser Application[J]. Acta Optica Sinica, 2019, 39(10): 1000001

邵建达,朱美萍,李静平,孙建,赵元安,易葵. 惯性约束聚变激光驱动装置用大尺寸偏振薄膜研究综述[J]. 光学学报, 2019, 39(10): 1000001

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