• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied optics >Near-IR absorption in high-purity photothermorefractive glass and holographic optical elements: measurement and application for high-energy lasers
【24h】

Near-IR absorption in high-purity photothermorefractive glass and holographic optical elements: measurement and application for high-energy lasers

机译：高纯度光热裂变玻璃和全息光学元件中的近红外吸收：高能激光器的测量和应用

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

Volume Bragg gratings (VBGs) in photothermorefractive (PTR) glass are widely used for laser beam control including high-power laser systems. Among them, spectral beam combining based on VBGs is one of the most promising. Achieving 100 + kW of combined laser beams requires the development of PTR glass and VBGs with an extremely low absorption coefficient and therefore methods of its measurement. This paper describes the calorimetric method that was developed for measuring a low absorption coefficient in PTR glass and VBGs. It is based on transmission monitoring of the intrinsic Fabry-Perot interferometer produced by the plane-parallel surfaces of the measured optical elements when heated by high-power laser radiation. An absorption coefficient at 1085 nm as low as 5 X 10~(-5) cm~(-1) is demonstrated in pristine PTR glass while an absorption coefficient as low as 1 X 10~(-4) cm~(-1) is measured in high-efficiency reflecting Bragg gratings with highest purity. The actual level of absorption in PTR glass allows laser beam control at the 10 kW level, while the 100 kW level would require active cooling and/or decreasing the absorption in PTR Bragg gratings to a value similar to that in virgin PTR glass.
机译：光热折变（PTR）玻璃中的体积布拉格光栅（VBG）广泛用于包括高功率激光系统在内的激光束控制。其中，基于VBG的频谱束合并是最有前途的技术之一。要达到100 + kW的组合激光束，需要开发具有极低吸收系数的PTR玻璃和VBG，因此需要采用其测量方法。本文介绍了用于测量PTR玻璃和VBG中低吸收系数的量热法。它基于对由高功率激光辐射加热时被测光学元件的平行平面产生的固有Fabry-Perot干涉仪的透射监测。原始PTR玻璃在1085 nm处的吸收系数低至5 X 10〜（-5）cm〜（-1），而吸收系数低至1 X 10〜（-4）cm〜（-1）在具有最高纯度的高效反射布拉格光栅中进行测量。 PTR玻璃的实际吸收水平允许将激光束控制在10 kW的水平，而100 kW的水平将要求主动冷却和/或将PTR布拉格光栅的吸收降低到与原始PTR玻璃相似的值。

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