Abstract
We propose a novel fringe-analysis approach that addresses the issue of scanner error discrimination in pulse train interferometry. Our approach exploits the fact that variations in the scan velocity of a moving mirror cause the fringes to be nonuniform. This paper describes our discrimination procedure and its development using a short-time Fourier transform (STFT)-based scheme. The STFT-based time–frequency decomposition can be used to visualize the change of the interference fringe signal with time. The details of our approach are introduced within the framework of femtosecond optical frequency comb-based interferometry for the first time. Our experimental results demonstrate the reliability of the proposed algorithm for the linear scan determination of a moving mirror.
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