| 1.653 μm处甲烷分子谐波探测技术研究 |
| |
| 引用本文： | 刘盼,雷佳捷,方波,陈家金,赵卫雄,张为俊.1.653 μm处甲烷分子谐波探测技术研究[J].应用光学,2017,38(2):264-269. |
| |
| 作者姓名： | 刘盼 雷佳捷 方波 陈家金 赵卫雄 张为俊 |
| |
| 作者单位： | 1.中国科学院 合肥物质科学研究院 安徽光学精密机械研究所，安徽 合肥 230031 |
| |
| 基金项目： | 国家自然科学基金41127001安徽省杰出青年科学基金1508085J03中科院青年创新促进会2016383国家重点研发计划2016YFC0202205 |
| |
| 摘 要： | 谐波探测被广泛应用于激光光谱技术中，利用它可以提高探测灵敏度。利用1.653 μm的分布反馈式(DFB)二极管激光器作为光源，建立了一套可调谐半导体激光吸收光谱(TDLAS)甲烷探测装置。该装置利用由2块圆形柱面镜构成的光学多通池增加吸收光程，提高探测灵敏度。吸收池基长为15 cm，在112次反射情况下，有效吸收光程达到16.8 m，实现甲烷0.60×10-6(2 s采样时间)的探测极限，可应用于实际大气甲烷的痕量探测。
|
| 关 键 词： | 光谱学 二次谐波 高灵敏度探测 浓度反演 |
| 收稿时间： | 2016-08-23 |
Harmonic detection technology of methane molecule at 1.653 μm |
| |
| Affiliation: | 1.Anhui Institute of Optics and Fine Meachanics, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei 230031, China2.University of Science and Technologyof China, Hefei 230026, China3.Nanjing University of Information Science and Technology, Nanjing 210044, China |
| |
| Abstract: | Harmonic detection is widely used in laser spectroscopy, which can improve detection sensitivity. In this paper, a set of tunable diode laser absorption spectroscopy(TDLAS) methane detection device is established by using 1.653 μm distributed feedback (DFB) diode laser as light source. The device utilizes two circular cylindrical mirror composed of optical multi-cell to increase absorption of optical path and improve detection sensitivity. Absorption length of multi-pass optical cell is 15 cm, and effective absorption path length is 16.8 m in 112 reflex cases, and detection limit of methane 0.60×10-6(2 s sampling time) is realized, which can be applied to trace detection of actual atmospheric methane. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《应用光学》浏览原始摘要信息 |
|
点击此处可从《应用光学》下载全文 |
|
