Improving the Accuracy of Determining the Shape of Optical Spectra by Eliminating Interference Effects Using Fourier Analysis

We propose a method for eliminating the interference pattern from optical spectra, letting us improve the accuracy in determining the spectral function. The method is based on formal replacement of the energy argument in the spectral function by a temporal argument, followed by Fourier transformation to the frequency domain. In the frequency representation obtained, the frequency region corresponding to the contribution from the interference pattern is filtered out, and then the shape of the spectrum is recovered by an inverse Fourier transformation and replacement of the argument. We give a criterion for applicability of the method to real optical spectra.