• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied optics >Monitoring and analysis of thermal deformation waves with a high-speed phase measurement system
【24h】

Monitoring and analysis of thermal deformation waves with a high-speed phase measurement system

机译：高速相位测量系统监测和分析热变形波

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thermal effects in optical substrates are vitally important in determining laser damage resistance in long-pulse and continuous-wave laser systems. Thermal deformation waves in a soda-lime-silica glass substrate have been measured using high-speed interferometry during a series of laser pulses incident on the surface. Two-dimensional images of the thermal waves were captured at a rate of up to six frames per thermal event using a quantitative phase measurement method. The system comprised a Mach-Zehnder interferometer, along with a high-speed camera capable of up to 20,000 frames-per-second. The sample was placed in the interferometer and irradiated with 100 ns, 2 kHz Q-switched pulses from a high-power Nd:YAG laser operating at 1064 nm. Phase measurements were converted to temperature using known values of thermal expansion and temperature-dependent refractive index for glass. The thermal decay at the center of the thermal wave was fit to a function derived from first principles with excellent agreement. Additionally, the spread of the thermal distribution over time was fit to the same function. Both the temporal decay fit and the spatial fit produced a thermal diffusivity of 5 x 10(-7) m(2)/s. (C) 2015 Optical Society of America
机译：光学基板中的热效应对于确定长脉冲和连续波激光系统中的耐激光损伤性至关重要。在一系列入射到表面的激光脉冲过程中，已经使用高速干涉仪测量了钠钙硅玻璃基板中的热变形波。使用定量相位测量方法，每个热事件最多以六帧的速率捕获热波的二维图像。该系统包括一台Mach-Zehnder干涉仪，以及一台速度高达每秒20,000帧的高速摄像机。将样品放在干涉仪中，并用工作在1064 nm的高功率Nd：YAG激光器照射100 ns，2 kHz调Q脉冲。使用已知的玻璃热膨胀值和与温度相关的折射率，将相位测量值转换为温度。在热波中心的热衰减与从第一原理导出的函数非常吻合。另外，热分布随时间的散布也适合相同的功能。时间衰减拟合和空间拟合都产生5 x 10（-7）m（2）/ s的热扩散率。 （C）2015年美国眼镜学会

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号