Open AccessMultichannel Fourier-transform interferometry for fast signals
Author(s) -
S. P. Heussler,
H. O. Moser,
S. M. P. Kalaiselvi,
Chenggen Quan,
Cho Jui Tay
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.012628
Subject(s) - optics , apodization , shutter , interferometry , fourier transform , physics , photon , spectral resolution , noise (video) , computer science , spectral line , quantum mechanics , astronomy , artificial intelligence , image (mathematics)
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.