Ultra-sensitive mid-infrared cavity leak-out spectroscopy using a cw optical parametric oscillator

被引:34
作者
Popp, A
Müller, F
Kühnemann, F
Schiller, S
von Basum, G
Dahnke, H
Hering, P
Mürtz, M
机构
[1] Univ Bonn, Inst Angew Phys, D-53115 Bonn, Germany
[2] Univ Dusseldorf, Inst Expt Phys, D-40225 Dusseldorf, Germany
[3] Univ Dusseldorf, Inst Lasermed, D-40225 Dusseldorf, Germany
来源
APPLIED PHYSICS B-LASERS AND OPTICS | 2002年 / 75卷 / 6-7期
关键词
D O I
10.1007/s00340-002-1047-9
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report a portable, all-solid-state, mid-infrared spectrometer for trace-gas analysis. The light source is a continuous-wave optical parametric oscillator based on PPLN and pumped by a Nd:YAG laser at 1064 nm. The generated single-frequency idler output covers the wavelength region between 2.35 and 3.75 mum. With its narrow line width, this light source is suitable for precise trace-gas analysis with very high sensitivity. Using cavity leak-out spectroscopy we achieved a minimum detectable absorption coefficient of 1.2 x 10(-9) /cm (integration time: 16 s), corresponding, for example, to a detection limit of 300 parts per trillion ethane. This sensitivity and the compact design make this trace-gas analyzer a promising tool for various in situ environmental and medical applications.
引用
收藏
页码:751 / 754
页数:4
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