Cavity ringdown spectroscopy using mid-infrared quantum-cascade lasers

Authors
Paldus, BA Harb, CC Spence, TG Zare, RN Gmachl, C Capasso, F Sivco, DL Baillargeon, JN Hutchinson, AL Cho, AY
Citation
Ba. Paldus et al., Cavity ringdown spectroscopy using mid-infrared quantum-cascade lasers, OPTICS LETT, 25(9), 2000, pp. 666-668
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
01469592 → ACNP
Volume
25
Issue
9
Year of publication
2000
Pages
666 - 668
Database
ISI
SICI code
0146-9592(20000501)25:9<666:CRSUMQ>2.0.ZU;2-5
Abstract
Cavity ringdown spectra of ammonia at 10 parts in 10(9) by volume (ppbv) an d higher concentrations were recorded by use of a 16-mW continuous-wave qua ntum-casacde distributed-feedback laser at 8.5 mu m whose wavelength was co ntinuously temperature tuned over 15 nm. A sensitivity (noise-equivalent ab sorbance) of 3.4 x 10(-9) cm(-1) Hz(-1/2) was achieved for ammonia in nitro gen at standard temperature and pressure, which corresponds to a detection limit of 0.25 ppbv. (C) 2000 Optical Society of America.