Fig. 4: Spectrum detection through MOD.

a Typical usage of a MOD window in an integrated spectrometer design. An experimentally produced MOD spectrometer (left) and a schematic diagram of its functional framework (right). b Detected MOD signal under the illumination of monochromatic light source (left) and spectral response matrix of the MOD element (right). Color bar: light intensity. c Spectra of a range of separate monochromatic light signals at 37 different wavelengths across the visible to near-infrared range (390–1710 nm), as measured by our reconstructive spectrometer (colored lines) and reference commercial spectrometers (black dotted lines). d Reconstruction accuracy optimization by adjusting the wedge angle. Illumination monochromatic light is centered at 517 nm. Arrows indicate FWHM. e Reconstruction of two mixed narrow-band signals with peaks separated by 4 nm. f Reconstruction of a continuous broadband spectrum. Reference spectra are measured using a commercial spectrometer.