Abstract

We introduce a phase information-based, free-of-optimization multiple spectrometers' spectral alignment method. Our technique relies on the observation that the slope of the unwrapped phase of the interferometric signal changes linearly with the same gradient for all identical spectrometers. Our method shows the clear benefit of shorter computational time compared to previously proposed methods based on optimization algorithms. The approach presented here can be used with commercially available spectrometers in which access to optical elements is limited and physical alignment is impossible.

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