Simultaneous reference and differential waveform acquisition in time-resolved terahertz spectroscopy

Krzysztof Iwaszczuk; David Cooke; Masazumi Fujiwara; Hideki Hashimoto; Peter Uhd Jepsen

doi:10.1364/OE.17.021969

Simultaneous reference and differential waveform acquisition in time-resolved terahertz spectroscopy

Krzysztof Iwaszczuk, David Cooke, Masazumi Fujiwara, Hideki Hashimoto, Peter Uhd Jepsen

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Abstract

We present a new method for data acquisition in time-resolved terahertz spectroscopy experiments. Our approach is based on simultaneous collection of reference and differential THz scans. Both the optical THz generation beam and the pump beam are modulated at two different frequencies that are not harmonic with respect to each other. Our method allows not only twice as fast data acquisition but also minimization of noise connected to slowly varying laser power fluctuations and timing instabilities. Our use of the nonlinear crystal N-benzyl-2-methyl-4-nitroaniline (BNA) enables time-resolved THz spectroscopy to beyond 5 THz, thereby highlighting that the presented method is especially valuable at higher frequencies where phase errors in the data acquisition become increasingly important.

Original language	English
Journal	Optics Express
Volume	17
Issue number	24
Pages (from-to)	21969-21976
ISSN	1094-4087
DOIs	https://doi.org/10.1364/OE.17.021969
Publication status	Published - 2009

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-17-24-21969. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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title = "Simultaneous reference and differential waveform acquisition in time-resolved terahertz spectroscopy",

abstract = "We present a new method for data acquisition in time-resolved terahertz spectroscopy experiments. Our approach is based on simultaneous collection of reference and differential THz scans. Both the optical THz generation beam and the pump beam are modulated at two different frequencies that are not harmonic with respect to each other. Our method allows not only twice as fast data acquisition but also minimization of noise connected to slowly varying laser power fluctuations and timing instabilities. Our use of the nonlinear crystal N-benzyl-2-methyl-4-nitroaniline (BNA) enables time-resolved THz spectroscopy to beyond 5 THz, thereby highlighting that the presented method is especially valuable at higher frequencies where phase errors in the data acquisition become increasingly important.",

author = "Krzysztof Iwaszczuk and David Cooke and Masazumi Fujiwara and Hideki Hashimoto and Jepsen, {Peter Uhd}",

note = "This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-17-24-21969. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

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AU - Iwaszczuk, Krzysztof

AU - Cooke, David

AU - Fujiwara, Masazumi

AU - Hashimoto, Hideki

AU - Jepsen, Peter Uhd

N1 - This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-17-24-21969. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

PY - 2009

Y1 - 2009

N2 - We present a new method for data acquisition in time-resolved terahertz spectroscopy experiments. Our approach is based on simultaneous collection of reference and differential THz scans. Both the optical THz generation beam and the pump beam are modulated at two different frequencies that are not harmonic with respect to each other. Our method allows not only twice as fast data acquisition but also minimization of noise connected to slowly varying laser power fluctuations and timing instabilities. Our use of the nonlinear crystal N-benzyl-2-methyl-4-nitroaniline (BNA) enables time-resolved THz spectroscopy to beyond 5 THz, thereby highlighting that the presented method is especially valuable at higher frequencies where phase errors in the data acquisition become increasingly important.

AB - We present a new method for data acquisition in time-resolved terahertz spectroscopy experiments. Our approach is based on simultaneous collection of reference and differential THz scans. Both the optical THz generation beam and the pump beam are modulated at two different frequencies that are not harmonic with respect to each other. Our method allows not only twice as fast data acquisition but also minimization of noise connected to slowly varying laser power fluctuations and timing instabilities. Our use of the nonlinear crystal N-benzyl-2-methyl-4-nitroaniline (BNA) enables time-resolved THz spectroscopy to beyond 5 THz, thereby highlighting that the presented method is especially valuable at higher frequencies where phase errors in the data acquisition become increasingly important.

U2 - 10.1364/OE.17.021969

DO - 10.1364/OE.17.021969

M3 - Journal article

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VL - 17

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EP - 21976

JO - Optics Express

JF - Optics Express

IS - 24

ER -

Simultaneous reference and differential waveform acquisition in time-resolved terahertz spectroscopy

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