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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Near-infrared diode laser wavelength modulation-based photoacoustic spectrometer
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Near-infrared diode laser wavelength modulation-based photoacoustic spectrometer

机译:基于近红外二极管激光波长调制的光声光谱仪

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摘要

An inexpensive resonant photoacoustic spectrometer based on a low-power distributed feedback diode laser and wavelength modulation spectroscopy is developed. This sensor has been applied to the detection of acetylene (C2H2) using a properly designed photoacoustic cell operating on its second longitudinal mode. The minimum detectable limit of about 10 parts-per-million volume (signal to noise ratio=1) is achieved at atmospheric pressure, and the pressure and laser power linear dependence of the photoacoustic signal is also investigated. Moreover, in this paper we also describe some basic theory of gas photoacoustic spectroscopy. (c) 2005 Elsevier B.V. All rights reserved.
机译:开发了一种廉价的基于低功率分布式反馈二极管激光器和波长调制光谱的共振光声光谱仪。该传感器已使用在第二纵向模式下运行的正确设计的光声电池,用于检测乙炔(C2H2)。在大气压力下达到了约百万分之十的最小可检测极限(信噪比= 1),并且还研究了光声信号的压力和激光功率线性相关性。此外,在本文中,我们还描述了气体光声光谱学的一些基本理论。 (c)2005 Elsevier B.V.保留所有权利。

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