A recovery procedure has been developed to correct instrument line-shape distortions observed in Fourier transform spectroscopy. The procedure can be described as a phase-error correction performed in the spectral domain to correct for path-difference-dependent phase errors observed in sharp spectral features. The technique has been applied successfully to high-resolution atmospheric emission spectra. The inherent broadening of the real features has been separated accurately from instrumental distortions. Using models for the path-difference-dependent error sources and data from two narrow window regions at 50 and 118 cm<sup>−1</sup>, we show that the distortion has a simple dependence on the spectral frequency.
© 1998 Optical Society of America
Piera Raspollini, Peter Ade, Bruno Carli, and Marco Ridolfi, "Correction of Instrument Line-Shape Distortions in Fourier Transform Spectroscopy," Appl. Opt. 37, 3697-3704 (1998)