title: Multichannel Fourier-transform interferometry for fast signals.
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.
authors.affiliation: Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, 117603 Singapore. slshsp@nus.edu.sg
authors.forename: S P
authors.initials: SP
authors.lastname: Heussler
authors.forename: H O
authors.initials: HO
authors.lastname: Moser
authors.forename: S M
authors.initials: SM
authors.lastname: Kalaiselvi
authors.forename: C G
authors.initials: CG
authors.lastname: Quan
authors.forename: C J
authors.initials: CJ
authors.lastname: Tay
mesh_terms: D004867:Equipment Design; D005583:Fourier Analysis; D007368:Interferometry / Q000379:methods*; D008962:Models, Theoretical; D013055:Spectrophotometry, Infrared / Q000379:methods*