基于 3.38μm 砷化镓分布式反馈激光器的石英增强光声光谱学。

Quartz enhanced photoacoustic spectroscopy with a 3.38 μm antimonide distributed feedback laser.

机构信息

Institut d’Electronique du Sud (IES), UMR CNRS 5214, CC067, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier, cedex 05, France.

出版信息

Opt Lett. 2012 Jul 1;37(13):2502-4. doi: 10.1364/OL.37.002502.

DOI:10.1364/OL.37.002502

PMID:22743435

Abstract

A system for gas sensing based on the quartz-enhanced photoacoustic spectroscopy technique has been developed. It makes use of a quantum well distributed feedback (DFB) laser diode emitting at 3.38 μm. This laser emits near room temperature in the continuous wave regime. A spectrophone, consisting of a quartz tuning fork and two steel microresonators were used. Second derivative wavelength modulation detection is used to perform low concentration measurements. The sensitivity and the linearity of the Quartz enhanced photoacoustic spectroscopy (QEPAS) sensor were studied. A normalized noise equivalent absorption coefficient of 4.06×10(-9) cm(-1)·W/Hz(1/2) was achieved.

摘要

已经开发出一种基于石英增强光声光谱技术的气体传感系统。它利用在室温附近连续波模式下发射的 3.38 μm 量子阱分布反馈（DFB）激光二极管。该系统使用了由石英音叉和两个钢微谐振器组成的声光谱仪。采用二次导数波长调制检测来进行低浓度测量。研究了石英增强光声光谱（QEPAS）传感器的灵敏度和线性度。实现了归一化噪声等效吸收系数为 4.06×10(-9) cm(-1)·W/Hz(1/2)。