Spatial filter pinhole for high-energy pulsed lasers.
Spatial filter pinhole for high-energy pulsed lasers.
复制标题
DOI：
10.1364/ao.37.002371
复制
发表时间：
1998-04
期刊：
影响因子：
1.9
通讯作者：
P. Celliers;K. Estabrook;R. Wallace;J. Murray;L. D. Da Silva;B. MacGowan;B. V. Van Wonterghem;K. Manes
中科院分区：
文献类型：
--
作者：
P. Celliers;K. Estabrook;R. Wallace;J. Murray;L. D. Da Silva;B. MacGowan;B. V. Van Wonterghem;K. Manes
空间滤波器是高能脉冲激光系统中保持高光束质量的重要器件。为未来的惯性约束聚变驱动系统（如美国国家点火装置（NIF））设想的长持续时间（21 ns）高能脉冲可能会导致空间滤波器中针孔内等离子体产生和闭合效应的增加。的NIF设计的针孔空间滤波器的设计目标是删除小角度散射光束小到？100-穆拉德发散用常规的针孔设计是否能满足这种设计要求是不确定的。我们提出了一种新的针孔架构，解决这些问题，将旨在减少等离子体生成速率的功能。初步实验证明，这种设计相对于传统的针孔设计的性能改善。
Spatial filters are essential components for maintaining high beam quality in high-energy pulsed laser systems. The long-duration (21 ns) high-energy pulses envisioned for future inertial-confinement fusion drive systems, such as the U.S. National Ignition Facility (NIF), are likely to lead to increased plasma generation and closure effects within the pinholes in the spatial filters. The design goal for the pinhole spatial filter for the NIF design is to remove small-angle scatter in the beam to as little as a ?100-murad divergence. It is uncertain whether this design requirement can be met with a conventional pinhole design. We propose a new pinhole architecture that addresses these issues by incorporating features intended to reduce the rate of plasma generation. Initial experiments with this design have verified its performance improvement relative to a conventional pinhole design.