| 周家成,徐学哲,雷佳捷,方波,赵卫雄,张为俊.近红外光腔衰荡光谱系统设计及研究[J].装备环境工程,2019,16(6):25-29. ZHOU Jia-cheng,XU Xue-zhe,LEI Jia-jie,FANG Bo,ZHAO Wei-xiong,ZHANG Wei-jun.Design and Research of Near-infrared Cavity Ring-down Spectroscopy System[J].Equipment Environmental Engineering,2019,16(6):25-29. |
| 近红外光腔衰荡光谱系统设计及研究 |
| Design and Research of Near-infrared Cavity Ring-down Spectroscopy System |
| 投稿时间：2018-12-25 修订日期：2019-06-25 |
| DOI：10.7643/ issn.1672-9242.2019.06.005 |
| 中文关键词: 光谱学 光腔衰荡光谱技术 触发电路 衰荡时间 HO2自由基 |
| 英文关键词:spectroscopy CRDS trigger circuit ring-down time HO2 free radical |
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| Author | Institution |
| ZHOU Jia-cheng | 1.Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2. University of Science and Technology of China, Hefei 230026, China |
| XU Xue-zhe | 1.Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
| LEI Jia-jie | 3. Nanjing University of Information Science and Technology, Nanjing 210044, China |
| FANG Bo | 1.Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2. University of Science and Technology of China, Hefei 230026, China |
| ZHAO Wei-xiong | 1.Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China |
| ZHANG Wei-jun | 1.Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2. University of Science and Technology of China, Hefei 230026, China |
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| 中文摘要: |
| 目的 搭建一套近红外光腔衰荡光谱测量系统，实现水汽吸收的探测。方法 通过测量有无样品存在时的衰荡时间，实现腔内介质吸收的探测。通过测量空腔衰荡时间，计算腔镜反射率。通过测量不同浓度的水汽吸收，验证系统是否可用于分子吸收的测量。结果 该装置的空腔衰荡时间约为3.75 μs，对应的腔镜反射率为99.982%，有效吸收光程为1.1 km。测量了6627.7 cm-1处水汽的吸收，结果与HITRAN数据库一致。结合文献报道结果和HITRAN数据库吸收谱线，模拟得到了NH3、C2H2、HO2自由基在6625~6626 cm-1范围内的吸收系数。结论 该装置实现了水汽吸收的探测，在该装置的激光器工作波长范围内，可应用于NH3、C2H2、HO2自由基的实时探测。 |
| 英文摘要: |
| Objective To construct a near-infrared cavity ring-down spectroscopy system to detect water-vapor absorption. Methods The absorption of medium in the cavity was detected through measurements of the ring-down time in presence or absence of medium. The reflectivity of the cavity high-reflection mirror was calculated. Different concentrations of water vapor were measured to verify whether the system can be used for measurement of molecular absorption. Results The cavity ring-down time of the device was about 3.75 μs, corresponding to a cavity mirror reflectivity of 99.982%, and an effective absorption optical path of 1.1 km. The water vapor absorption at 6627.7 cm-1 was measured, and the results were consistent with the HITRAN database. Through investigating absorption intensity in literatures and HITRAN database, the absorption coefficients of NH3, C2H2, and HO2 radical had been simulated in the wavelength range of 6625-6626 cm-1. Conclusion The device could detect the vapor absorption and can be applied to real-time measurement of NH3, C2H2 and HO2 free radicals within the operating wavelength of the laser. |
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