| 叶志斌,黄钢,邓小雷.基于光腔衰荡光谱技术的大气气溶胶消光系数探测的研究[J].光电子激光,2018,29(5):505~510 |
| 基于光腔衰荡光谱技术的大气气溶胶消光系数探测的研究 |
| Cavity ring down spectroscopy technique for the measurement of aerosol extincti on coefficient |
| 投稿时间：2017-10-01 |
| DOI： |
| 中文关键词: 气溶胶 消光系数 腔衰荡 校准 |
| 英文关键词:aerosol extinction coefficient cavity ring down calibration |
| 基金项目:国家自然科学基金(51605253)、浙江省自然科学基金(LY16E050011)、衢州市科技计划项目(2016Y012)和衢州学院师资队伍建设专项经费资助(BSYJ201705)资助项目 (1.衢州学院电气与信息工程学院,浙江 衢州 324000; 2.衢州学院机械工程学院,浙江 衢州 324000) |
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| 中文摘要: |
| 光腔衰荡光谱技术是近十年来迅速发展起来的一 种新型光谱检测技术,具有超高灵敏度和低检测限 的优点。本文首先从比尔定律入手,分析了振荡时间和消光系数的计算方法。实验上,采用 532nm脉冲激 光器作为光源,高反射率共焦腔作为衰荡腔,搭建了一套测量大气气溶剂消光系数探测仪器 。根据不同浓 度的NO2气体对532nm激光有不同的吸收系数,实现了对消光仪准 确性的验证。所研制的消光仪系统检 测限为0.222μs,系统的稳定性为0.18%,系 统灵敏度值为1.47×10－7 m－1,基本达到达到国内外 先进水平。由实验结果可知,高反射率腔镜及脉冲腔衰荡方法对研制高稳定性、高灵敏度气 溶胶消光系数检测装置具有重要意义。 |
| 英文摘要: |
| Optical cavity ring down spectroscopy is a new type of spectroscopic d etection technique.It develops rapidly in recent years with the advantages of ultra-high sensitivity and l ow detection limit.In this paper, with the Beer′s law,the calculation methods of oscillation time and extinct ion coefficient are analyzed. Experimentally,an atmospheric aerosol extinction coefficient detection system is set up based on a 532nm pulse laser used as the light source and a high reflectivity confocal cavity use d as the cavity.The NO2gases with different concentrations are used for calibration because of their different abso rptions coefficients.The detection limit of the system is 0.222μs,the stability is 0.18%,and the sensitivity is 1.47×10－7 m－1.Cavity mirror s with high reflectivity and pulse cavity ring down technology are quite feasible in the development of detecti on systems of aerosol extinction coefficients with high stability and sensitivity． |
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