Off-axis re-entrant cavity ring-down spectroscopy with a mid-infrared continuous-wave optical parametric oscillator

被引:13
|
作者
Peltola, J. [1 ]
Vainio, M. [1 ,2 ]
Ulvila, V. [1 ]
Siltanen, M. [1 ]
Metsala, M. [1 ]
Halonen, L. [1 ]
机构
[1] Univ Helsinki, Dept Chem, Phys Chem Lab, FIN-00014 Helsinki, Finland
[2] Ctr Metrol & Accreditat, Espoo 02151, Finland
来源
APPLIED PHYSICS B-LASERS AND OPTICS | 2012年 / 107卷 / 03期
关键词
ENHANCED ABSORPTION-SPECTROSCOPY; SPECTRAL RESOLUTION; OUTPUT SPECTROSCOPY; LASER; FORMALDEHYDE;
D O I
10.1007/s00340-012-5074-x
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We demonstrate an off-axis cavity ring-down spectroscopy system, which uses a mid-infrared continuous-wave optical parametric oscillator as a light source. Off-axis injection with re-entrant configuration of the ring-down cavity is used to achieve high spectral resolution while maintaining high measurement speed. This makes the setup suitable for sensitive molecular spectroscopy in the mid-infrared region, particularly for studies that require high temporal resolution. Formaldehyde (H2CO) absorption spectrum at 3.4 A mu m is measured using the off-axis re-entrant cavity ring-down spectrometer.
引用
收藏
页码:839 / 847
页数:9
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