Sensitive detection of methane and nitrous oxide isotopomers using a continuous wave quantum cascade laser

被引：36

作者：

Gagliardi, G

Tamassia, F

De Natale, P

Gmachl, C

Capasso, F

Sivco, DL

Baillargeon, JN

Hutchinson, AL

Cho, AY

机构：

[1] Univ Florence, European Lab NonLinear Spect, I-50125 Florence, Italy

[2] Univ Florence, Ist Nazl Fis Mat, I-50125 Florence, Italy

[3] Ist Nazl Ott Applicata, I-50125 Florence, Italy

[4] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

来源：

EUROPEAN PHYSICAL JOURNAL D | 2002年 / 19卷 / 03期

关键词：

D O I：

10.1140/epjd/e20020091

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A continuous wave quantum cascade laser (QCL), operating near 8.1 mum, was used for wavelength modulation spectroscopy of methane (CH4) and nitrous oxide (N2O) stable isotopes. Several rotational transitions of (N2O)-N-14-O-16, (NNO)-N-15-N-14-O-16, (N2O)-N-14-O-18, (N2O)-N-14-O-17, (CH4)-C-13 and (CH4)-C-12 fundamental bands were detected. The noise-equivalent absorbance was measured to be less than 10(-5) in a 1-Hz bandwidth. A characterization of the laser source was also performed. The use of a QCL spectrometer for high-precision isotope ratio measurements is discussed.

引用

页码：327 / 331

页数：5

共 24 条

[1] HIGH-PRECISION DIRECT MEASUREMENTS OF (CH4)-C-13/(CH4)-C-12 AND (CH3D)-C-12/(CH4)-C-12 RATIOS IN ATMOSPHERIC METHANE SOURCES BY MEANS OF A LONG-PATH TUNABLE DIODE-LASER ABSORPTION SPECTROMETER [J].