Photoacoustic detection of nitric oxide by use of a quantum-cascade laser

被引：20

作者：

Elia, A ^{[1
]}

Lugará, PM ^{[1
]}

Giancaspro, C ^{[1
]}

机构：

[1] Inst Nazl Fis Mat Reg Lab, Dipartimento Interateneo Fis Michelangelo Merlin, I-70126 Bari, Italy

来源：

OPTICS LETTERS | 2005年 / 30卷 / 09期

关键词：

D O I：

10.1364/OL.30.000988

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A photoacoustic trace-gas sensor for the measurement of nitric oxide with a detection limit of 500 parts in 109 has been demonstrated. The radiation source was a thermoelectrically cooled distributed-feedback quantum-cascade laser operating in pulsed mode near 5.3 mu m with an average laser power of 8 mW. A resonant photoacoustic cell was excited in its first longitudinal mode by the modulated laser light. Preliminary measurements have been performed to test the performance of our photoacoustic sensor; possible improvements to reach lower detection limits are discussed. (c) 2005 Optical Society of America

引用

页码：988 / 990

页数：3

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