A field-portable, laser-diode spectrometer for the ultra-sensitive detection of hydrocarbon gases

被引：12

作者：

Gibson, G ^{[1
]}

Monk, SD ^{[1
]}

Padgett, M ^{[1
]}

机构：

[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

来源：

JOURNAL OF MODERN OPTICS | 2002年 / 49卷 / 5-6期

关键词：

D O I：

10.1080/09500340110108639

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have developed a field-portable optical gas sensor for the ultra-sensitive detection of ethane. The system is based on an adaptation of a commercially available system, which uses a cryogenically cooled, lead-salt laser diode at 3.34 mum and a multi-pass astigmatic Herriott sample cell. We have adapted this system to a second derivative wavelength modulation scheme giving a lower detection limit of less than 100 parts per trillion for a one second measurement time. Our custom-designed software controls every aspect of the instrument operation from spectral scanning of the laser diode, to automatic calibration, optical alignment, spectral analysis and complete data logging.

引用

页码：769 / 776

页数：8