Sub-part-per-billion monitoring of nitric oxide by use of wavelength modulation spectroscopy in combination with a thermoelectrically cooled, continuous-wave quantum cascade laser

被引：52
作者：
Moeskops, BWM [1 ]
Cristescu, SM [1 ]
Harren, FJM [1 ]
机构：
[1] Radboud Univ Nijmegen, Inst Mol & Mat, Dept Mol & Laser Phys, NL-6500 GL Nijmegen, Netherlands
来源：
OPTICS LETTERS | 2006年 / 31卷 / 06期
关键词：
D O I：
10.1364/OL.31.000823
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We used a thermoelectrically cooled, continuous-wave, quantum cascade laser operating between 1847 and 1854 cm(-1) in combination with wavelength modulation spectroscopy for the detection of nitric oxide (NO) at the sub-part-per-billion by volume (ppbv) level. The laser emission overlaps the P-7.5 doublet of NO centered around 1850.18 cm(-1). Using an astigmatic multiple-pass absorption cell with an optical path length of 76 m, we achieved a detection limit of 0.2 ppbv at 1.0 kPa, with a total acquisition time of 30 s. The corresponding minimal detectable absorption is 8.8 X 10(-9) cm(-1) Hz(-1/2). (c) 2006 Optical Society of America.
引用
收藏
页码：823 / 825
页数：3
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