Optical parametric oscillator based difference frequency laser source for photoacoustic trace gas spectroscopy in the 3μm mid-IR range

被引：34

作者：

Bohren, A ^{[1
]}

Sigrist, MW ^{[1
]}

机构：

[1] ETH Zurich, Inst Quantum Elect, CH-8093 Zurich, Switzerland

来源：

INFRARED PHYSICS & TECHNOLOGY | 1997年 / 38卷 / 07期

关键词：

optical parametric oscillator; difference frequency generation; photoacoustic spectroscopy; trace gas monitoring;

D O I：

10.1016/S1350-4495(97)00041-8

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report on the extension of the emission wavelength range of a nanosecond pulsed commercial optical parametric oscillator (OPO) towards the infrared. By difference frequency mixing the idler of the OPO with the fundamental of irs Nd:YAG pump laser the wavelength range from 2.5-1.5 mu m is covered at considerable pulse energies. This laser source is then applied for the first time to photoacoustic trace gas spectroscopy in the fundamental C-H stretch band located around 3.3 mu m Spectra of single-and multi-component gas mixtures of volatile organic compounds are recorded and analyzed with respect to composition and concentration. The detection limits for the individual substances within the gas mixtures are found in the lower parts per million (ppm) range. (C) 1997 Elsevier Science B.V.

引用

页码：423 / 435

页数：13

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