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Proceedings Paper

Measurement of photoacoustic signals and noises in a sensitive spectrophone with a frequency-stabilized CO2 laser
Author(s): Constantin A.D. Dutu; Simona M. Cristescu; Dan C. Dumitras
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Paper Abstract

An experimental system for the evaluation of photoacoustic (PA) signal characteristics and noises in a resonant photoacoustic cell excited in its first longitudinal mode by a line tunable and frequency stabilized CO2 laser is presented. The excitation beam is modulated at a frequency that is coincident with one of the natural resonant acoustic frequencies of the cell. The PA signal detected by four microphones placed in the cell was measured by two methods, namely phase sensitive detection and computer assisted Fourier analysis. Experimental measurements in air, N2, SF6 and C2H4 at various pressures (

Paper Details

Date Published: 8 March 1995
PDF: 7 pages
Proc. SPIE 2461, ROMOPTO '94: Fourth Conference in Optics, (8 March 1995); doi: 10.1117/12.203562
Show Author Affiliations
Constantin A.D. Dutu, Institute of Atomic Physics (Romania)
Simona M. Cristescu, Institute of Atomic Physics (Romania)
Dan C. Dumitras, Institute of Atomic Physics (Romania)

Published in SPIE Proceedings Vol. 2461:
ROMOPTO '94: Fourth Conference in Optics
Valentin I. Vlad, Editor(s)

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