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Total column oxygen detection using a Fabry-Perot interferometer

机译：Total column oxygen detection using a Fabry-Perot interferometer

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摘要

A passive instrument based on a Fabry-Perot interferometer was designed and used for oxygen atmospheric column absorption measurements. The instrument operates in the oxygen A-band spectral region from 759 to 771 nm. Surface solar irradiation reflected off the Earth is detected using two channels at two wavelengths--one for pressure sensing and the other for temperature sensing. Each channel of the O_(2) column measurement system consists of two subchannels--Fabry-Perot and reference. Solid Fabry-Perot etalons were designed and used to confine the response to the O_(2) absorption bands. The etalons have free spectral ranges of 0.575, 0.802, and 2.212 nm. Two narrow bandpass filters (760 to 764 and 767 to 771 nm) were also used. The instrument is sensitive to changes in oxygen column as small as 0.88 mbar for ground-based experiments and 5 mbar for airborne measurements. The major advantages of the optical setup are its compactness, high sensitivity, high signal-to-noise ratio, and stability for both ground and airborne experiments.

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