| 连续激光辐照下光学材料损伤阈值的光斑效应 |
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| 引用本文： | 郭少锋,陆启生,程湘爱,江厚满,马厉克. 连续激光辐照下光学材料损伤阈值的光斑效应[J]. 光学学报, 2002, 22(9): 055-1058 |
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| 作者姓名： | 郭少锋 陆启生 程湘爱 江厚满 马厉克 |
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| 作者单位： | 国防科技大学理学院,长沙,410073;国防科技大学理学院,长沙,410073;国防科技大学理学院,长沙,410073;国防科技大学理学院,长沙,410073;国防科技大学理学院,长沙,410073 |
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| 基金项目： | 国家 8 6 3激光技术领域 (86 3 410 5 )资助课题 |
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| 摘 要： | 实验发现,光学材料的激光损伤阈值对激光光斑大小有强烈的依赖关系。研究了连续激光和匀质材料相互作用的机制,针对小光斑情形的材料响应和大光斑情形的结构响应分别提出各自不同的物理模型来解释光斑效应。研究表明,材料响应中的光斑效应基于热传导引起的光斑区热弥散,边界条件不同,破坏阈值与光斑大小的依赖关系也不尽相同。
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| 关 键 词： | 光学材料 激光损伤阈值 材料响应 结构响应 光斑效应 |
| 收稿时间： | 2001-09-24 |
Spot Size Effect of CW Laser Induced Damage Threshold in Optical Materials |
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| Guo Shaofeng Lu Qisheng Cheng Xiangai Jiang Houman Ma Like. Spot Size Effect of CW Laser Induced Damage Threshold in Optical Materials[J]. Acta Optica Sinica, 2002, 22(9): 055-1058 |
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| Authors: | Guo Shaofeng Lu Qisheng Cheng Xiangai Jiang Houman Ma Like |
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| Abstract: | Experimental research shows that laser induced damage thresholds (LIDT) are strongly dependent on the beam radius. The thermo-elastic model describing the interaction of CW laser with uniform optical materials is established, and material response and structure response are studied independently. Study shows that spot size effect in material response results from the energy loss of the irradiated area. As for structure response, different mechanical boundaries result in different relationships of LIDT with radius of laser beam. |
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| Keywords: | optical materials laser induced damage threshold material response structure response spot size |
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