Cavity ringdown spectroscopy using mid-infrared quantum-cascade lasers

被引：113

作者：

Paldus, BA

Harb, CC

Spence, TG

Zare, RN

Gmachl, C

Capasso, F

Sivco, DL

Baillargeon, JN

Hutchinson, AL

Cho, AY

机构：

[1] Informed Diagnost Inc, Sunnyvale, CA 94086 USA

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

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

来源：

OPTICS LETTERS | 2000年 / 25卷 / 09期

关键词：

D O I：

10.1364/OL.25.000666

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Cavity ringdown spectra of ammonia at 10 parts in 10(9) by volume (ppbv) and higher concentrations were recorded by use of a 16-mW continuous-wave quantum-casacde distributed-feedback laser at 8.5 mu m whose wavelength was continuously temperature tuned over 15 nm. A sensitivity (noise-equivalent absorbance) of 3.4 x 10(-9) cm(-1) Hz(-1/2) was achieved for ammonia in nitrogen at standard temperature and pressure, which corresponds to a detection limit of 0.25 ppbv. (C) 2000 Optical Society of America.

引用

页码：666 / 668

页数：3

共 13 条

[1]

Busch K. W., 1999, AM CHEM SOC S SERIES, V720

[2]

Capasso F, 1999, PHYS WORLD, V12, P27

[3] BANDGAP ENGINEERING OF SEMICONDUCTOR HETEROSTRUCTURES BY MOLECULAR-BEAM EPITAXY - PHYSICS AND APPLICATIONS [J].