Mid-infrared Fourier transform spectroscopy with a broadband frequency comb

被引：223

作者：

Adler, Florian ^{[1
,2
]}

Maslowski, Piotr ^{[1
,2
,4
]}

Foltynowicz, Aleksandra ^{[1
,2
]}

Cossel, Kevin C. ^{[1
,2
]}

Briles, Travis C. ^{[1
,2
]}

Hartl, Ingmar ^{[3
]}

Ye, Jun ^{[1
,2
]}

机构：

[1] Natl Inst Stand & Technol, JILA, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] IMRA Amer Inc, Ann Arbor, MI 48105 USA

[4] Uniwersytet Mikolaja Kopernika, Inst Fizyki, PL-87100 Torun, Poland

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 21期

基金：

瑞典研究理事会; 美国国家科学基金会;

关键词：

OPTICAL PARAMETRIC OSCILLATOR; ABSORPTION-SPECTROSCOPY; BREATH ANALYSIS; FEMTOSECOND LASER; NITROUS-OXIDE; MU-M; METHANE; 21ST-CENTURY; GENERATION; CLIMATE;

D O I：

10.1364/OE.18.021861

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a first implementation of optical-frequency-comb-based rapid trace gas detection in the molecular fingerprint region in the mid-infrared. Near-real-time acquisition of broadband absorption spectra with 0.0056 cm(-1) maximum resolution is demonstrated using a frequency comb Fourier transform spectrometer which operates in the 2100-to-3700-cm(-1) spectral region. We achieve part-per-billion detection limits in 30 seconds of integration time for several important molecules including methane, ethane, isoprene, and nitrous oxide. Our system enables precise concentration measurements even in gas mixtures that exhibit continuous absorption bands, and it allows detection of molecules at levels below the noise floor via simultaneous analysis of multiple spectral features. (C) 2010 Optical Society of America

引用

页码：21861 / 21872

页数：12

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