A5072363124- Digital Holography and Microscopy
- Optical measurement and interference techniques
- Advanced Optical Imaging Technologies
- Advanced Vision and Imaging
- Image Processing Techniques and Applications
- Advanced Photonic Communication Systems
- Engineering Applied Research
- Advanced Optical Sensing Technologies
- Video Surveillance and Tracking Methods
- Thermography and Photoacoustic Techniques
- Surface Roughness and Optical Measurements
- Photoacoustic and Ultrasonic Imaging
- Visual Attention and Saliency Detection
- Semiconductor Lasers and Optical Devices
Hefei Institutes of Physical Science
2024
Anhui University
2024
Kunming University of Science and Technology
2003-2018
Abstract: 高功率激光在内通道传播过程中,光束会在导光路径中加热传播介质产生热晕现象,影响高能激光设备出光口处光束质量;由于内通道中光路排布复杂,因此对导光路径上热晕影响的评估往往需要复杂的工作和较长的时间。为适应工程中对导光路径热晕效应快速评估的需要,本文提出一种基于有限元法的内光路热晕效应快速模拟方法。该方法对流体区域进行微元划分,利用有限元分析方法进行流场分析;对复杂内通道的流场区域建立简化分析模型,在简化模型中划分等晕区域;根据各等晕区域内光程差计算结果,完成热晕效应导致的相位畸变的数值模拟计算。将计算结果与现有方法计算结果对比,结果显示,该方法计算结果与现有方法计算结果偏差小于3.6%,相位畸变形式相近。利用该方法完成对直管道不同重力作用方向下的热晕影响分析,结果显示,相位畸变随重力方向变化而变化,相位变化的大小与重力在垂直于光轴方向的分量大小有很强的相关性。该方法相较于现有方法灵活性高、无需进行复杂自编分析程序调试。该方法的分析结果在工程设计阶段能够快速评估内通道导光路径中热晕效应,为确定热晕抑制方法提供重要参考。
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