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Multiplex Fabry-Perot interferometer: II. Laboratory prototype.

H E Snell, W B Cook, P B Hays

    Applied Optics
    |November 10, 2010
    PubMed
    Summary
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    The Multiplex Fabry-Perot interferometer (MFPI) offers a more efficient way to analyze spectral data. This instrument requires shorter scan distances than traditional Michelson interferometers for comparable results.

    Area of Science:

    • Physics
    • Spectroscopy
    • Atmospheric Science

    Background:

    • Fabry-Perot interferometers are optical devices used for high-resolution spectroscopy.
    • Analyzing multiple reflections within an interferometer can be complex.
    • Traditional Fourier transform methods may require extensive scanning distances.

    Purpose of the Study:

    • To introduce and describe the design and construction of the Multiplex Fabry-Perot interferometer (MFPI).
    • To demonstrate the MFPI's capability in spectral analysis.
    • To compare MFPI solar absorption spectra with atmospheric models.

    Main Methods:

    • Utilizing a Fabry-Perot interferometer with large étalon plate separation.
    • Applying Fourier transformation to the interferogram to analyze multiple reflections.

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  • Comparing solar absorption spectra obtained from the MFPI with the FASCODE atmospheric model.

    • Main Results:

    • The MFPI allows analysis of multiple reflections analogous to an array of Michelson interferometers.
    • MFPI requires significantly less scan distance compared to a comparable Michelson interferometer.
    • Measured solar absorption spectra align with predictions from the FASCODE atmospheric model.

    Conclusions:

    • The MFPI is a viable and efficient instrument for spectral analysis.
    • The MFPI design offers advantages in scan distance requirements.
    • The instrument's performance is validated through comparison with established atmospheric models.