Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers

Recent investigations have induced relevant advancements of imaging interferometry, which is becoming a viable option for Earth remote sensing. Various research programs have chosen the Sagnac configuration for new imaging interferometers. Due to the growing diffusion of this technique, we have deve...

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Bibliographic Details
Published in:Optics express 2010-05, Vol.18 (11), p.11622-11649
Main Authors: Barducci, Alessandro, Guzzi, Donatella, Lastri, Cinzia, Marcoionni, Paolo, Nardino, Vanni, Pippi, Ivan
Format: Article
Language:English
Subjects:
Equipment Design
Equipment Failure Analysis
Interferometry - instrumentation
Spectroscopy, Fourier Transform Infrared - instrumentation
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Summary:Recent investigations have induced relevant advancements of imaging interferometry, which is becoming a viable option for Earth remote sensing. Various research programs have chosen the Sagnac configuration for new imaging interferometers. Due to the growing diffusion of this technique, we have developed a self-contained theory for describing the signal produced by triangular FTSs and its optimal processing. We investigate the relevant disadvantages of multiplexing, and compare dispersive with FTS instruments. The paper addresses some methods for correcting the phase error, and the non-unitary transformation performed by a Sagnac interferometer. The effect of noise on spectral estimations is discussed.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.18.011622