Spectral anomalies due to temporal correlation in a white-light interferometer
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Updated: Jul 13, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
Maruthi M Brundavanam1, Nirmal K Viswanathan, Narayana Rao Desai
1School of Physics, University of Hyderabad, Hyderabad 500046, India.
Abstract:
We present what we believe to be the first experimental demonstration of anomalous spectral behavior such as spectral shifts and spectral switches due to temporal correlation around the intensity minima in a white-light interferometer. Unusual behavior in the number of spectral fringes, measured within the source bandwidth, as a function of path delay between the interfering beams is also reported. Experimental observations match well with the spectra calculated by using the interference law in the spectral domain.
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