Photoacoustic monitoring of trace gases by use of a diode-based differencefrequency laser source

Authors
Fischer, C Sigrist, MW Yu, Q Seiter, M
Citation
C. Fischer et al., Photoacoustic monitoring of trace gases by use of a diode-based differencefrequency laser source, OPTICS LETT, 26(20), 2001, pp. 1609-1611
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS LETTERS
ISSN journal
01469592 → ACNP
Volume
26
Issue
20
Year of publication
2001
Pages
1609 - 1611
Database
ISI
SICI code
0146-9592(20011015)26:20<1609:PMOTGB>2.0.ZU;2-5
Abstract
We present a compact mid-infrared laser spectrometer for trace-gas monitori ng. Difference frequency generation in periodically poled LiNbO3 is used as laser source, yielding a tuning range 3.2-3.7 mum at a linewidth of 154 MH z. The relatively high average power of 3 to 5 mW favors detection with a s mall resonant photoacoustic gas cell. Measurements of methane yield a detec tion limit in the low parts in 10(6) by volume concentration range. (C) 200 1 Optical Society of America.