• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied optics >Performance improvement and analysis of a 1.6 (mu)m continuous-wave modulation laser absorption spectrometer system for CO_(2) sensing
【24h】

Performance improvement and analysis of a 1.6 (mu)m continuous-wave modulation laser absorption spectrometer system for CO_(2) sensing

机译：用于CO_（2）传感的1.6μm连续波调制激光吸收光谱仪系统的性能改进和分析

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

In a previous study, we developed a 1.6 (mu)m continuous-wave (cw) modulation laser absorption spectrometer system for CO_(2) sensing and demonstrated the measurement of small fluctuations in CO_(2) corresponding to a precision of 4 parts per million (ppm) with a measurement interval of 32 s. In this paper, we present the process to achieve this highly specific measurement by introducing important points, which have not been shown in the previous study. Following the results of preliminary experiments, we added a function for speckle averaging on the optical antenna unit. We additionally came up with some ideas to avoid the influences of etalon effects and polarization dependence in optical components. Because of the new functions, we realized a calibration precision of 0.006 dB (rms), which corresponds to a CO_(2) concentration precision of less than 1 ppm for a 2 km path. We also analyzed the CO_(2) sensing performance after the improvements described above. The measured short time fluctuation of the differential absorption optical depth was reasonably close to that calculated using the carrier-to-noise ratio of the received signal.
机译：在先前的研究中，我们开发了用于CO_（2）传感的1.6μm连续波（cw）调制激光吸收光谱仪系统，并演示了测量CO_（2）中小波动的方法，该精度对应于每4个零件的精度百万（ppm），测量间隔为32 s。在本文中，我们介绍了通过引入要点来实现这种高度特定的测量的过程，而在以前的研究中并未显示这些要点。根据初步实验的结果，我们在光学天线单元上添加了散斑平均功能。我们还提出了一些想法，以避免标准具效应和光学组件中偏振相关性的影响。由于有了这些新功能，我们实现了0.006 dB（rms）的校准精度，相当于2 km路径的CO_（2）浓度精度低于1 ppm。我们还分析了上述改进后的CO_（2）传感性能。所测得的差分吸收光学深度的短时波动合理地接近于使用接收信号的载噪比计算得出的波动。

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