Broadband THz high-resolution interferometry using coherent synchrotron radiation

被引：0

作者：

Barros, J. ^{[1
]}

Manceron, L. ^{[1
]}

Brubach, J. -B. ^{[1
]}

Evain, C. ^{[2
]}

Couprie, M. -E. ^{[1
]}

Tordeux, M. -A. ^{[1
]}

Labat, M. ^{[1
]}

Bielawski, S. ^{[2
]}

Szwaj, C. ^{[2
]}

Ursu, R. ^{[1
]}

Roy, P. ^{[1
]}

机构：

[1] Synchrotron SOLEIL, BP 48, F-91192 Gif Sur Yvette, France

[2] Univ Sci & Technol Lille, Laboratoire Phys Lasers Atomes & Mol, F-59655 Villeneuve Dascq, France

来源：

TERAHERTZ EMITTERS, RECEIVERS, AND APPLICATIONS III | 2012年 / 8496卷

关键词：

short electron bunches; Coherent Synchrotron Radiation; FTIR spectra; molecular spectroscopy; INFRARED BEAMLINE;

D O I：

10.1117/12.929859

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：8

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