HIGH-STABILITY REFERENCE SETUP FOR PHOTOACOUSTIC-SPECTROSCOPY

Authors
JULLIARD K GISIN N PELLAUX JP
Citation
K. Julliard et al., HIGH-STABILITY REFERENCE SETUP FOR PHOTOACOUSTIC-SPECTROSCOPY, Applied physics. B, Lasers and optics, 65(4-5), 1997, pp. 601-607
Citations number
10
Categorie Soggetti
Physics, Applied",Optics
Journal title
Applied physics. B, Lasers and optics → ACNP
ISSN journal
09462171
Volume
65
Issue
4-5
Year of publication
1997
Pages
601 - 607
Database
ISI
SICI code
0946-2171(1997)65:4-5<601:HRSFP>2.0.ZU;2-N
Abstract
A simple and powerful reference technique for gas-coupled photoacousti c spectroscopy of strongly absorbing liquids and solids is presented. It consists in chopping the light beam simultaneously at two frequenci es, while using the sample itself as the reference. This allows one to automatically compensate fluctuations in parameters like light source intensity, temperature or gas volume. This technique was tested with aqueous solutions of glucose and a CO2 laser at 9.676 mu m.