Extensive characterization of the optical feedback cavity enhanced absorption spectroscopy (OF-CEAS) technique: ringdown-time calibration of the absorption scale

被引：21

作者：

Motto-Ros, V. ^{[1
]}

Durand, M. ^{[1
]}

Morville, J. ^{[1
]}

机构：

[1] Univ Lyon 1, CNRS, UMR 5579, Spectrometrie Ion & Mol Lab, F-69622 Villeurbanne, France

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2008年 / 91卷 / 01期

关键词：

D O I：

10.1007/s00340-008-2950-5

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The paper describes in detail an implementation of the highly sensitive optical feedback cavity enhanced absorption spectroscopic (OF-CEAS) technique. A Brewster-angle cavity has been used to enable resonant optical feedback injection. For the first time, an OF-CEAS-adapted processing allowing calibration of the cavity-enhanced spectra in absolute absorption units has been experimentally verified through the combination of ringdown-time and mode-amplitude measurements. The experimental system performance has been evaluated by measuring very weak oxygen B-band transitions near 688 nm. Absorption spectra covering the range of 1.35 cm(-1)have been averaged over the 5-s measurement time at the minimum detectable loss of 3x10(-10)/cm within the measurement dynamic range greater than four orders of magnitude. A detailed signal-to-noise ratio analysis estimates the measurement spectral precision as being 3 MHz (short time scale averaging).

引用

页码：203 / 211

页数：9

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