Fig. 1
From: Scalable miniature on-chip Fourier transform spectrometer for Raman spectroscopy
Working principle of the miniature Raman spectrometer. The multi-aperture waveguide-based FTS (\(A\)) collects an exemplary Raman spectrum with high optical throughput. The output power from each interferometer (y) is measured, and the Raman spectrum (\(x\)) is reconstructed by solving the linear matrix equation (\({Ax}=y\)), where \(A\) represents the transform matrix of the FTS
