Experimental data on CO2 detection using Fabry-Perot-based optical setup for atmospheric observations

Elena Georgieva; Emily Wilson; Mariusz Miodek; William S. Heaps

doi:10.1117/12.506008

3 November 2003 Experimental data on CO₂ detection using Fabry-Perot-based optical setup for atmospheric observations

Elena Georgieva, Emily Wilson, Mariusz Miodek, William S. Heaps

Proceedings Volume 5157, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research V; (2003) https://doi.org/10.1117/12.506008
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The experimental data on CO₂ detection in atmosphere using Fabry-Perot technique are presented. The optical setup consists of two channels. Channel one measure the total reflected light, whereas channel two uses a solid substrate Fabry-Perot etalon to restrict measurement to light in CO₂ absorption bands. The free spectral range of the etalon is calculated to be equal to the almost regular spacing between the CO₂ spectral bands located near 1.58 μm, where CO₂ absorption is significant. The ratio of the intensities detected by the two channels is then sensitive to CO₂ change. We are exploring the temperature dependence of the index of refraction of the optical media to align the pass bands of the Fabry-Perot etalon to the appropriate CO₂ absorption lines. The experimental data presented show excellent agreement with our theoretical expectations. They are recorded at different gas pressures and temperatures. Some of the major advantages of the optical setup are its compactness, high sensitivity, high signal-to-noise ratio, and stability.

Citation Download Citation

Elena Georgieva, Emily Wilson, Mariusz Miodek, and William S. Heaps "Experimental data on CO₂ detection using Fabry-Perot-based optical setup for atmospheric observations", Proc. SPIE 5157, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research V, (3 November 2003); https://doi.org/10.1117/12.506008

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