NDLI: Compensation of THz spectrum spurious oscillations by local apodization

Content Provider	IEEE Xplore Digital Library
Author	Bafluelos-Saucedo, M.A.
Copyright Year	2015
Description	Author affiliation: Centro de Cienc. Aplic. y Desarrollo Tecnol., Univ. Nac. Autonoma de Mexico, Mexico City, Mexico (Bafluelos-Saucedo, M.A.)
Abstract	In a THz time-domain spectroscopy (THz-TDS) system, Etalon effects, which appear as secondary peaks in the time-domain signal, produce amplitude spurious oscillations in the spectrum. For preventing this, in the case of multiple reflections inside the detector crystal, an anti-reflection coating can be used. For other cases, like secondary peaks produced by the sample, a compensation algorithm based in convolution and other techniques have been reported in the literature. In this paper, a method based on local apodization is proposed as an alternative to reduce spurious oscillations in THz-TDS spectrums. We show that, using a rectangular apodization function, it is possible to compensate the spurious oscillations with reduced degradation of other spectral features. The proposed method depends on three parameters, which gives it flexibility, though optimal settings need to be found by trial and error at this point. This method can compensate any secondary peak regardless of the source producing it.
Sponsorship	IEEE
Starting Page	1
Ending Page	4
File Size	187310
Page Count	4
File Format	PDF
e-ISBN	9781479982035
DOI	10.1109/ICSENS.2015.7370280
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Absorption Oscillators Time-domain analysis Spectroscopy Laser beams Reflection Degradation local apodization THz time-domain spectroscopy THz spectrum spurious oscillations
Content Type	Text
Resource Type	Article

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