Monitoring of molecular species using near-infrared extended cavity diode lasers

H. Simonsen, J. Henningsen, T. Møgelberg
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引用次数: 1

Abstract

Near infrared diode lasers are attractive for spectroscopic applications due to their good spectral purity and low amplitude noise. They operate at room temperature with single-mode output power of milliwatts, and are adapted to fibre optic technology. Wavelength tunability is achieved using an extended cavity configuration. We report on a system based on high resolution infrared spectrometry in the 1.5-1.6 /spl mu/m region where several gases have overtone or combination absorption bands. In monitoring applications toxic and flammable gases like CO and H/sub 2/S are of particular interest. CO detection is aimed at detecting fires with special reference to smouldering combustion within the insulating layers of equipment, whereas H/sub 2/S is a major health hazard on oil rigs producing sour oil.
利用近红外扩展腔二极管激光器监测分子种类
近红外二极管激光器具有良好的光谱纯度和较低的振幅噪声,在光谱学应用中具有很大的吸引力。它们在室温下工作,单模输出功率为毫瓦,适用于光纤技术。波长可调性是通过扩展腔结构实现的。我们报道了一种基于高分辨率红外光谱的系统,在1.5-1.6 /spl mu/m区域,几种气体具有泛音或组合吸收带。在监测应用中,有毒和可燃气体,如CO和H/sub 2/S,特别令人感兴趣。CO探测的目的是探测火灾,特别是设备绝缘层内的闷烧燃烧,而H/sub 2/S是生产含硫油的石油钻井平台的主要健康危害。
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