Comparison of time and frequency multiplexing techniques in multicomponent FM spectroscopy

Robert Josef Muecke; Peter W. Werle; Franz Slemr; Wilhelm Prettl

doi:10.1117/12.46160

1 May 1991 Comparison of time and frequency multiplexing techniques in multicomponent FM spectroscopy

Robert Josef Muecke, Peter W. Werle, Franz Slemr, Wilhelm Prettl

Proceedings Volume 1433, Measurement of Atmospheric Gases; (1991) https://doi.org/10.1117/12.46160
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

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.

Citation Download Citation

Robert Josef Muecke, Peter W. Werle, Franz Slemr, and Wilhelm Prettl "Comparison of time and frequency multiplexing techniques in multicomponent FM spectroscopy", Proc. SPIE 1433, Measurement of Atmospheric Gases, (1 May 1991); https://doi.org/10.1117/12.46160

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