期刊
ANALYST
卷 144, 期 6, 页码 2003-2010出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8an02164c
关键词
-
资金
- National Key R&D Program of China [2017YFB0405300]
- National Natural Science Foundation of China [61775079, 61627823]
- Key Science and Technology R&D program of Jilin Province, China [20180201046GX]
- Industrial Innovation Program of Jilin Province, China [2017C027]
- National Science Foundation (NSF) ERC MIRTHE award
- Robert Welch Foundation [C-0586]
By combining frequency division multiplexing assisted wavelength modulation spectroscopy (FDM-WMS) and off-axis integrated-cavity output spectroscopy (OA-ICOS), a near-infrared (near-IR) dual-gas sensor system was demonstrated for simultaneous chemical gas-phase detection of acetylene (C2H2) and methane (CH4). Two distributed feedback (DFB) lasers modulated at the frequency of 3 kHz and 4 kHz with an emitting wavelength of 1532 and 1653 nm were used to target two absorption lines, C2H2 at 6523.88 cm(-1) and CH4 at 6046.95 cm(-1), respectively. A 6 cm-long cavity was fabricated, which reveals an effective path length of 9.28 m (@ 1532 nm, C2H2) and 8.56 m (@ 1653 nm, CH4), respectively. Performances of the dual-gas sensor system were experimentally evaluated using C2H2 and CH4 samples generated by an Environics gas mixing system. An Allan deviation of 700 parts-per-billion in volume (ppbv) for C2H2 with an averaging time of 200 s and 850 ppbv for CH4 with an averaging time of 150 s was achieved for these two gas species. Dynamic measurements of a C2H2/CH4 : N-2 mixture were performed for monitoring both C2H2 and CH4 simultaneously. This dual-gas sensor has the merits of reduced size and cost compared to two separate OA-ICOS sensors and reveals the minimum detectable column density (DCD) compared to other reported C2H2 and CH4 sensor systems.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据