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Proceedings Paper

Broadband THz high-resolution interferometry using coherent synchrotron radiation
Author(s): J. Barros; L. Manceron; J.-B. Brubach; C. Evain; M.-E. Couprie; M.-A. Tordeux; M. Labat; S. Bielawski; C. Szwaj; R. Ursu; P. Roy
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Paper Abstract

In storage rings, short electron bunches can produce an intense THz radiation called Coherent Synchrotron Radiation (CSR). The flux of this emission between 250 and 750 GHz is very advantageous for spectroscopy, but intensity fluctuations lead to artifacts in the FTIR spectra and, until now, prevented the use of CSR for high-resolution measurements. At SOLEIL, we found stable CSR conditions for which the signal-to-noise ratio (S/N) allows for measurements at high resolution. Moreover, we developed an artifact correction system, based on a simultaneous detection of the input and the output signals of the interferometer, which allows improving further the signal-to-noise ratio. The stable CSR combined with this ingenious technique allowed us to record for the first time high-resolution FTIR spectra in the sub-THz range, with an exceptional S/N of 100 in a few hours.

Paper Details

Date Published: 15 October 2012
PDF: 8 pages
Proc. SPIE 8496, Terahertz Emitters, Receivers, and Applications III, 84960P (15 October 2012); doi: 10.1117/12.929859
Show Author Affiliations
J. Barros, Synchrotron SOLEIL (France)
L. Manceron, Synchrotron SOLEIL (France)
J.-B. Brubach, Synchrotron SOLEIL (France)
C. Evain, Univ. des Sciences et Technologies de Lille (France)
M.-E. Couprie, Synchrotron SOLEIL (France)
M.-A. Tordeux, Synchrotron SOLEIL (France)
M. Labat, Synchrotron SOLEIL (France)
S. Bielawski, Univ. des Sciences et Technologies de Lille (France)
C. Szwaj, Univ. des Sciences et Technologies de Lille (France)
R. Ursu, Synchrotron SOLEIL (France)
P. Roy, Synchrotron SOLEIL (France)

Published in SPIE Proceedings Vol. 8496:
Terahertz Emitters, Receivers, and Applications III
Manijeh Razeghi; Alexei N. Baranov; Henry O. Everitt; John M. Zavada; Tariq Manzur, Editor(s)

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