Broadband-tunable external-cavity quantum cascade lasers for the spectroscopic detection of hazardous substances

被引：30

作者：

Hugger, S. ^{[1
]}

Fuchs, F. ^{[1
]}

Jarvis, J. ^{[1
]}

Kinzer, M. ^{[1
]}

Yang, Q. K. ^{[1
]}

Driad, R. ^{[1
]}

Aidam, R. ^{[1
]}

Wagner, J. ^{[1
]}

机构：

[1] Fraunhofer Inst Appl Solid State Phys IAF, Tullastr 72, D-79108 Freiburg, Germany

来源：

QUANTUM SENSING AND NANOPHOTONIC DEVICES X | 2013年 / 8631卷

关键词：

D O I：

10.1117/12.2008880

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Broadband tunable external cavity quantum cascade lasers (EC-QCL) have emerged as attractive light sources for mid-infrared (MIR) "finger print" molecular spectroscopy for detection and identification of chemical compounds. Here we report on the use of EC-QCL for the spectroscopic detection of hazardous substances, using stand-off detection of explosives and sensing of hazardous substances in water as two prototypical examples. Our standoff-system allows the contactless identification of solid residues of various common explosives over distances of several meters. Furthermore, results on an EC-QCL-based setup for MIR absorption spectroscopy on liquids are presented, featuring a by a factor of ten larger single-pass optical path length of 100 mu m as compared to conventional Fourier transform infrared spectroscopy instrumentations.

引用

页数：13

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