A frequency-modulated quantum-cascade laser for spectroscopy of CH4 and N2O isotopomers

被引：22
作者：
Gagliardi, G
Borri, S
Tamassia, F
Capasso, F
Gmachl, C
Sivco, DL
Baillargeon, JN
Hutchinson, AL
Cho, AY
机构：
[1] Ist Nazl Ott Applicata, I-80078 Pozzuoli Naples, Italy
[2] European Lab NonLinear Spect, I-50019 Sesto F, FI, Italy
[3] Univ Bologna, Dipartimento Chim Fis & Inorgan, I-40136 Bologna, Italy
[4] Harvard Univ, Div Engn & Appl Sci, Cruft Lab 310, Cambridge, MA 02138 USA
[5] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
[6] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
来源：
ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES | 2005年 / 41卷 / 04期
关键词：
carbon-13; IR spectrometry; isotope analysis; isotopomers; methane; nitrous oxide; nitrogen-15; oxygen-17; oxygen-18; NITROUS-OXIDE; RATIO MEASUREMENT; DIODE-LASERS; METHANE; SPECTROMETER; WATER; CO2;
D O I：
10.1080/10256010500384572
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We report the development of a novel laser spectrometer for high-sensitivity detection of methane and nitrous oxide. The system relies on a quantum-cascade laser source emitting wavelength of around 8.06 mu m, where strong fundamental absorption bands occur for the considered species and their isotopomers. The detection technique is based on audio-frequency and radio-frequency modulation of laser radiation. First experimental tests have been performed to estimate the achievable detection limits and the signal reproducibility levels in view of possible measurements of C-13/C-12, O-18/O-16, O-17/O-16 and N-15/N-14 isotope ratios.
引用
收藏
页码：313 / 321
页数：9
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