论文标题
光声相控的傅立叶转换红外光谱
Photoacoustic phase-controlled Fourier-transform infrared spectroscopy
论文作者
论文摘要
我们通过将其与相控制的傅立叶转换光谱法（PC-FTS）相结合，而不是传统的傅立叶转换红外光谱（FTIR），证明了宽带悬臂增强光谱光谱法（CEPA）的速度提高了13倍。 PC-FTS是FTIR的修改，并且能够从根本上更快地进行干涉图。速度改善对CEPA是有益的，CEPA是无背景光声学技术的特别敏感版本。我们使用PC-FTS-CEPAS技术来测量中红外区域中甲烷的吸收光谱（3.3 $ - $ 3.5 $ $ m），具有光频梳作为光源。
We demonstrate a 13-fold speed improvement in broadband cantilever-enhanced photoacoustic spectroscopy (CEPAS) by combining it with phase-controlled Fourier-transform spectroscopy (PC-FTS) instead of traditional Fourier-transform infrared spectroscopy (FTIR). PC-FTS is a modification of FTIR and capable of fundamentally faster interferogram acquisitions. The speed-improvement is beneficial for CEPAS, which is an especially sensitive version of the background-free photoacoustic spectroscopy technique. We used the PC-FTS-CEPAS technique to measure the absorption spectrum of methane in the mid-infrared region (3.3$-$3.5 $μ$m) with an optical frequency comb as the light source.
