A calibration method for broad-bandwidth cavity enhanced absorption spectroscopy performed with supercontinuum radiation
A calibration method for broad-bandwidth cavity enhanced absorption spectroscopy performed with supercontinuum radiation
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DOI：
10.1007/s00340-010-4044-4
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
T. Laurila;I. Burns;J. Hult;J. H. Miller;C. Kaminski
中科院分区：
文献类型：
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作者：
T. Laurila;I. Burns;J. Hult;J. H. Miller;C. Kaminski
提出了一种宽带腔增强吸收光谱的有效定标方法。校准使用相移腔衰荡光谱，这是方便地实现通过使用声光可调谐滤波器（AOTF）。AOTF允许SC光谱的窄带部分在腔镜的整个高反射率带宽上扫描。校准后，AOTF被关闭，宽带CEAS可以用相同的光源进行，而不会损失任何对准设置。我们通过探测可见光谱范围内氧分子O2和氧分子（O2）2碰撞对的跃迁来证明该方法的优点。
An efficient calibration method has been developed for broad-bandwidth cavity enhanced absorption spectroscopy. The calibration is performed using phase shift cavity ring-down spectroscopy, which is conveniently implemented through use of an acousto-optic tunable filter (AOTF). The AOTF permits a narrowband portion of the SC spectrum to be scanned over the full high-reflectivity bandwidth of the cavity mirrors. After calibration the AOTF is switched off and broad-bandwidth CEAS can be performed with the same light source without any loss of alignment to the set-up. We demonstrate the merits of the method by probing transitions of oxygen molecules O2and collisional pairs of oxygen molecules (O2)2in the visible spectral range.