Parts per trillion sensitivity for ethane in air with an optical parametric oscillator cavity leak-out spectrometer

被引：61

作者：

von Basum, G

Halmer, D

Hering, P

Mürtz, M

Schiller, S

Müller, F

Popp, A

Kühnemann, F

机构：

[1] Univ Dusseldorf, Inst Lasermed, D-40225 Dusseldorf, Germany

[2] Univ Dusseldorf, Inst Expt Phys, D-40225 Dusseldorf, Germany

[3] Univ Bonn, Inst Angew Phys, D-53115 Bonn, Germany

来源：

OPTICS LETTERS | 2004年 / 29卷 / 08期

关键词：

D O I：

10.1364/OL.29.000797

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Spectroscopic detection of ethane in the 3-mum wavelength region was performed by means of a cw optical parametric oscillator and cavity leak-out. We achieved a minimum detectable absorption coefficient of 1.6 X 10(-10) cm(-1)/rootHz, corresponding to an ethane detection limit of 6 parts per trillion/rootHz. For 3-min integration time the detection limit was 0.5 parts per trillion. The levels are to our knowledge the best demonstrated so far. These frequency-tuning capabilities facilitated multigas analysis with simultaneous monitoring of ethane, methane, and water vapor in human breath, (C) 2004 Optical Society of America.

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页码：797 / 799

页数：3

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