Fig. 1
From: High-performance and scalable on-chip digital Fourier transform spectroscopy
Images and schematics of the dFT architecture. a Block diagram illustrating the generic structure of a dFT spectrometer with j switches and K=j/2 − 1 repeated stages indexed by \(k \in [1,K]\); b photo of the fully packaged, plug-and-play dFT spectrometer with standard FC/PC fiber interface and a ribbon cable for control and signal read-out; c top-view optical micrograph of the 64-channel dFT spectrometer after front-end-of-line silicon fabrication, showing the interferometer layout, the thermo-optic switches and waveguide-integrated germanium photodetector
