Frequency-comb infrared spectrometer for rapid, remote chemical sensing
Frequency-comb infrared spectrometer for rapid, remote chemical sensing
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DOI：
10.1364/opex.13.009029
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发表时间：
2005-10-31
期刊：
影响因子：
3.8
通讯作者：
van der Weide, DW
中科院分区：
文献类型：
--
作者：
Schliesser, A;Brehm, M;van der Weide, DW
我们演示了实时记录的化学蒸汽波动从22米远的快速傅里叶变换红外（FTIR）光谱仪，使用激光样的红外探测光束产生的两个10-fs的钛：蓝宝石激光器。FTIR在“分子指纹”区域的宽9 - 12 μ m光谱通过快速外差自扫描分散，使光谱在2 cm（-1）分辨率下以70 μ s快照记录。我们通过主动操纵一个激光器的重复频率，以每秒950个红外光谱的速率实现连续采集。潜在的应用包括视频速率化学成像和瞬态光谱学，例如气体羽流，火焰和等离子体，以及通常不重复的现象，如蛋白质折叠动力学和脉冲磁场研究中发现的现象。(c)2005年，美国光学学会。
We demonstrate real-time recording of chemical vapor fluctuations from 22 m away with a fast Fourier-transform infrared (FTIR) spectrometer that uses a laser-like infrared probing beam generated from two 10-fs Ti:sapphire lasers. The FTIR's broad 9 - 12 mu m spectrum in the "molecular fingerprint" region is dispersed by fast heterodyne self-scanning, enabling spectra at 2 cm(-1) resolution to be recorded in 70 mu s snapshots. We achieve continuous acquisition at a rate of 950 IR spectra per second by actively manipulating the repetition rate of one laser. Potential applications include video-rate chemical imaging and transient spectroscopy of e.g. gas plumes, flames and plasmas, and generally non-repetitive phenomena such as those found in protein folding dynamics and pulsed magnetic fields research. (c) 2005 Optical Society of America.