...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical engineering >Use of quantum cascade lasers for detection of explosives: progress and challenges
【24h】

Use of quantum cascade lasers for detection of explosives: progress and challenges

机译：使用量子级联激光器检测爆炸物：进展和挑战

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

Detection of explosives is an emerging task for maintaining civil security. Optical methods and especially tunable diode laser spec-troscopy are discussed as means for providing fast and reliable data. Selective and sensitive detection is possible in the midinfrared spectral region; however, until recently, small and easy to operate laser sources were not readily available for applications outside the laboratory. The situation changes with the maturation of quantum cascade lasers (QCLs). We present detection methods based on photofragmentation and subsequent midinfrared detection of the fragments for the detection of nitrogen-based explosives. For this type of explosive, the very low vapor pressure makes the use of direct spectroscopic techniques extremely difficult, since the equilibrium concentrations are in the ppb to ppt range. Peroxide-based explosives like triacetone triperoxide possess a much higher vapor pressure, making direct absorption spectroscopy and also a quartz-enhanced photoacoustic spectroscopy sensor possible. The progress and challenges of the application of QCLs, also with respect to interferences with other molecules present, are discussed.
机译：爆炸物的检测是维护民安的一项新兴任务。讨论了光学方法，尤其是可调谐二极管激光光谱，作为提供快速可靠数据的手段。在中红外光谱区域中可以进行选择性和灵敏的检测；但是，直到最近，小型且易于操作的激光源还无法在实验室外使用。情况随着量子级联激光器（QCL）的成熟而变化。我们提出了基于光碎裂的检测方法，以及随后的碎片的中红外检测，以检测基于氮的爆炸物。对于这种炸药，由于平衡浓度在ppb到ppt范围内，因此非常低的蒸气压使直接光谱技术的使用极为困难。过氧化物基炸药（如三丙酮三氧化二氧）具有更高的蒸气压，这使得直接吸收光谱法和石英增强的光声光谱传感器成为可能。讨论了QCL应用的进展和挑战，以及与存在的其他分子的干扰方面的问题。

著录项

  • 来源
    《Optical engineering》 |2010年第11期|p.111126.1-111126.7|共7页
  • 作者

    Christoph Bauer; Ulrike Wilier; Wolfgang Schade;

  • 作者单位

    Clausthal University of Technology Laser Application Center Am Stollen 19 Goslar, Germany 38640 Currently with AIM Infrarot-Module GmbH, TheresienstraBe 2, 74072 Heilbronn, Germany;

    Clausthal University of Technology Energie-Forschungszentrum Niedersachsen Am Stollen 19 Goslar, Germany 38640;

    Fraunhofer Heinrich Hertz Institute and Clausthal University of Technology Laser Application Center Am Stollen 19 Goslar, Germany 38640;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser applications; sensors; photoacoustic spectroscopy; photonics;

    机译：激光应用;传感器光声光谱法;光子学;

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