Optimal design for the support structure of a cavity mirror in a chemical oxygen iodine laser resonator

Cui Ding; Deng Zhaoxiang; Xian Yuqiang; Hu Xiaoyang; Zhang Lin

摘要

The dynamic characteristics of the cavity mirror support structure strongly influence the quality of the output beam. However, the contradiction between excellent dynamic performance and light weight make the design process challenging. To cope with the problems encountered in the original design of a chemical oxygen iodine laser system, this paper presents a two-dimensional adjustable support structure based on spherical constraints with large specific stiffness in the initial design phase. Subsequently, a two-level optimization strategy containing a macro design and a detailed design is adopted to optimize the initial structure. At the macro design stage, a twostep topology optimization procedure is introduced, in which the scale of the optimization model is dramatically reduced using the independent continuous mapping algorithm to improve the calculation speed in the first step, and the gray elements are eliminated using the bi-directional evolutionary structural optimization method to clearly obtain the optimal topology in the second step. This method is verified to overcome the defect of low efficiency, while still eliminating gray elements. At the detailed design stage, an adaptive surrogate model and the multi-objective design optimization method are employed to seek the best compromise between the lower weight and higher dynamic performance. The results from the application to the example of the cavity mirror support structure show that the mass is reduced by 41.8%, and the dynamic performance requirement is fulfilled. (C) 2017 Optical Society of America

机译：腔镜支撑结构的动态特性强烈影响输出光束的质量。然而，优异的动态性能和轻量级之间的矛盾使得设计过程具有挑战性。为了应对化学氧碘激光系统的原始设计中遇到的问题，本文基于初始设计阶段具有大特定刚度的球形约束，呈现了二维可调支撑结构。随后，采用了一种含有宏观设计和详细设计的两级优化策略来优化初始结构。在宏观设计阶段，介绍了一种突变的拓扑优化过程，其中使用独立的连续映射算法显着减少了优化模型的比例来提高第一步中的计算速度，并且使用BI消除灰色元件 - 在第二步中清楚地获得最佳拓扑的转化结构优化方法。验证该方法以克服低效率的缺陷，同时仍然消除灰色元素。在详细的设计阶段，采用自适应替代模型和多目标设计优化方法来寻求较低重量和更高动态性能之间的最佳折衷。施加到腔体镜载体结构的示例的结果表明，质量降低了41.8％，并且满足动态性能要求。（c）2017年光学学会

Optimal design for the support structure of a cavity mirror in a chemical oxygen iodine laser resonator

摘要

著录项

相关主题

期刊订阅