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Proceedings Paper

Comparison of time and frequency multiplexing techniques in multicomponent FM spectroscopy
Author(s): Robert Josef Muecke; Peter W. Werle; Franz Slemr; Wilhelm Prettl
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Paper Abstract

A FM-TDLAS-instrument for simultaneous measurement of two atmospheric trace gases has been constructed. The instrument is designed to enable time or frequency multiplex operation after minor setup changes. Noise properties for the frequency modulated setup were investigated. It was found that the noise from both lasers combines as expected by square root addition. Additional noise from strong absorption lines has been observed. Consequences of these findings on the design of multi-species. FM-TDLAS-instruments are discussed.

Paper Details

Date Published: 1 May 1991
PDF: 9 pages
Proc. SPIE 1433, Measurement of Atmospheric Gases, (1 May 1991); doi: 10.1117/12.46160
Show Author Affiliations
Robert Josef Muecke, Fraunhofer Institute for Atmospheric Environmental Research (Germany)
Peter W. Werle, Fraunhofer Institute for Atmospheric Environmental Research (Germany)
Franz Slemr, Fraunhofer Institute for Atmospheric Environmental Research (Germany)
Wilhelm Prettl, Univ. Regensburg (Germany)

Published in SPIE Proceedings Vol. 1433:
Measurement of Atmospheric Gases
Harold I. Schiff, Editor(s)

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