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Updated: May 31, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
Multichannel Fourier-transform interferometry for fast signals
S P Heussler1, H O Moser, S M Kalaiselvi
1Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, 117603 Singapore. slshsp@nus.edu.sg
Abstract:
Multichannel Fourier transform interferometry to measure the spectrum of arbitrarily short pulses and of fast time-varying signals was achieved using a micro/nanomanufactured multimirror array. We describe the performance of a demonstrator FTIR that works in the mid-infrared (MIR) range of 700-1400 cm(-1) and reaches a spectral resolution of 10 cm(-1) taking into account apodization. Spectral measurements down to pulse lengths of 319 µs were carried out using a mechanical camera shutter. Arbitrarily short pulses are expected feasible provided the source can deliver enough photons to overcome the noise equivalent number of photons.
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