Photoacoustic spectroscopy using quantum-cascade lasers

被引：132

作者：

Paldus, BA ^{[1
]}

Spence, TG

Zare, RN

Oomens, J

Harren, FJM

Parker, DH

Gmachl, C

Cappasso, F

Sivco, DL

Baillargeon, JN

Hutchinson, AL

Cho, AY

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] Univ Nijmegen, Dept Mol & Laser Phys, NL-6500 GL Nijmegen, Netherlands

[3] AT&T Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

来源：

OPTICS LETTERS | 1999年 / 24卷 / 03期

关键词：

D O I：

10.1364/OL.24.000178

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photoacoustic spectra of ammonia and water vapor were recorded by use of a continuous-wave quantum-cascade distributed-feedback (QC-DFB) laser at 8.5 mu m with a 16-mW power output. The gases were flowed through a cell that was resonant at 1.6 kHz, and the QC-DFB source was temperature tuned over 35 nm for generation of spectra or was temperature stabilized on an absorption feature peak to permit real-time concentration measurements. A detection limit of 100 parts in 10(9) by volume ammonia at standard temperature and pressure was obtained for a 1-Hz bandwidth in a measurement time of 10 min. (C) 1999 Optical Society of America.

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页码：178 / 180

页数：3

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