Mid-infrared Fourier transform spectroscopy with a broadband frequency comb
Mid-infrared Fourier transform spectroscopy with a broadband frequency comb
复制标题
DOI：
10.1364/oe.18.021861
复制
发表时间：
2010-10-11
期刊：
影响因子：
3.8
通讯作者：
Ye, Jun
中科院分区：
文献类型：
--
作者：
Adler, Florian;Maslowski, Piotr;Ye, Jun
我们提出了第一个实现的光学频率梳为基础的快速痕量气体检测的分子指纹区域在中红外。利用频率梳状傅里叶变换光谱仪，在2100-3700-cm（-1）光谱范围内实现了宽带吸收光谱的近实时采集，最大分辨率为0.0056 cm（-1）。我们在30秒的积分时间内实现了几种重要分子的检测限，包括甲烷，乙烷，异戊二烯和一氧化二氮。我们的系统即使在具有连续吸收带的气体混合物中也能实现精确的浓度测量，并且通过同时分析多个光谱特征，可以在低于本底噪声的水平上检测分子。(C)2010年美国光学学会
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