A hybrid Fourier transform spectrometer with filterbank post-dispersion is proposed to reduce photon noise by over an order of magnitude while preserving imaging capabilities for R~1000 line intensity mapping.
Mach-Zehnder Fourier transform spectrometer for astronomical spec- troscopy at submillimeter wavelengths,
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Low-noise Fourier Transform Spectroscopy Enabled by Superconducting On-Chip Filterbank Spectrometers
A hybrid Fourier transform spectrometer with filterbank post-dispersion is proposed to reduce photon noise by over an order of magnitude while preserving imaging capabilities for R~1000 line intensity mapping.