Detection of N2O by photoacoustic spectroscopy with a compact, pulsed optical parametric oscillator

被引：19

作者：

Costopoulos, D ^{[1
]}

Miklós, A ^{[1
]}

Hess, P ^{[1
]}

机构：

[1] Univ Heidelberg, Inst Phys Chem, D-69120 Heidelberg, Germany

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2002年 / 75卷 / 2-3期

关键词：

D O I：

10.1007/s00340-002-0972-y

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A pulsed optical parametric oscillator (OPO) operated in an optical cavity with a grazing-incidence grating configuration (GIOPO) was used for sensitive photoacoustic detection of trace quantities of dinitrogen oxide (N2O). The (nu(1) + nu(3)) combination vibration band of N2O was excited with the idler beam of the GIOPO at 2.86 mum using an optical cavity optimized for the idler beam. The linewidth of the GIOPO could be reduced to 0.4 cm(-1), allowing the rotational structure of the absorption spectrum to be resolved. A concentration sensitivity (signal-to-noise ratio = 3) of 60 parts in 10(9) by volume (60 ppb V) N2O in synthetic air was obtained. This may be sufficient for continuous monitoring of N2O in the atmosphere.

引用

页码：385 / 389

页数：5

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