Complex direct comb spectroscopy with a virtually imaged phased array

We demonstrate a simple interferometric technique to directly measure the complex optical transmittance over a large spectral range using a frequency-comb spectrometer based on a virtually imaged phased array. A Michelson interferometer encodes the phase deviations induced by a sample contained in o...

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Bibliographic Details
Published in:Optics letters 2016-03, Vol.41 (6), p.1277-1280
Main Authors: Scholten, Sarah K, Anstie, James D, Hébert, Nicolas Bourbeau, White, Richard T, Genest, Jérôme, Luiten, Andre N
Format: Article
Language:English
Subjects:
Image reconstruction
Michelson interferometers
Opacity
Optical transfer function
Phased arrays
Spectra
Spectroscopy
Transmittance
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Summary:We demonstrate a simple interferometric technique to directly measure the complex optical transmittance over a large spectral range using a frequency-comb spectrometer based on a virtually imaged phased array. A Michelson interferometer encodes the phase deviations induced by a sample contained in one of its arms into an interferogram image. When combined with an additional image taken from each arm separately, along with a frequency-calibration image, this allows full reconstruction of the sample's optical transfer function. We demonstrate the technique with a vapor cell containing H13C14N, producing transmittance and phase spectra spanning 2.9 THz (∼23  nm) with ∼1 GHz resolution.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.001277