Thermoelectrically cooled quantum-cascade-laser-based sensor for the continuous monitoring of ambient atmospheric carbon monoxide

被引：63
作者：
Kosterev, AA
Tittel, FK
Köhler, R
Gmachl, C
Capasso, F
Sivco, DL
Cho, AY
Wehe, S
Allen, MG
机构：
[1] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA
[2] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA
[3] Phys Sci Inc, Andover, MA 01810 USA
来源：
APPLIED OPTICS | 2002年 / 41卷 / 06期
关键词：
D O I：
10.1364/AO.41.001169
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the first application of a thermoelectrically cooled, distributed-feedback quantum-cascade laser for continuous spectroscopic monitoring of CO in ambient air at a wavelength of 4.6 mum. A noise-equivalent detection limit of 12 parts per billion was demonstrated experimentally with a 102-cm optical pathlength and a 2.5-min data acquisition time at a 10-kHz pulsed-laser repetition rate. This sensitivity corresponds to a standard error in fractional absorbance of 3 x 10(-5). (C) 2002 Optical Society of America.
引用
收藏
页码：1169 / 1173
页数：5
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