High-sensitivity detection of TNT

被引：192

作者：

Pushkarsky, Michael B.

Dunayevskiy, Ilya G.

Prasanna, Manu

Tsekoun, Alexei G.

Go, Rowel

Patel, C. Kumar N.

机构：

[1] Pranalyt Inc, Santa Monica, CA 90401 USA

[2] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2006年 / 103卷 / 52期

关键词：

quantum cascade lasers; high-power lasers; continuous-wave operation; room temperature operation; TNT detection;

D O I：

10.1073/pnas.0609789104

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We report high-sensitivity detection of 2,4,6-trinitrotoluene (TNT) by using laser photoacoustic spectroscopy where the laser radiation is obtained from a continuous-wave room temperature high-power quantum cascade laser in an external grating cavity geometry. The external grating cavity quantum cascade laser is continuously tunable over approximate to 400 nm around 7.3 mu m and produces a maximum continuous-wave power of approximate to 200 mW. The IR spectroscopic signature of TNT is sufficiently different from that of nitroglycerine so that unambiguous detection of TNT without false positives from traces of nitroglycerine is possible. We also report the results of spectroscopy of acetylene in the 7.3-mu m region to demonstrate continuous tunability of the IR source.

引用

收藏

页码：19630 / 19634

页数：5

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