Publikation: High-resolution THz spectrometer with kHz scan rates
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2006
Autor:innen
Dreyhaupt, Andre
Winnerl, Stephan
Helm, Manfred
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Optics Express. 2006, 14(1), pp. 430-437. Available under: doi: 10.1364/OPEX.14.000430
Zusammenfassung
We demonstrate a rapid scanning high-resolution THz spectrometer capable of acquiring THz field transients with 1 ns duration without mechanical delay line. The THz spectrometer is based on two 1-GHz Ti:sapphire femtosecond lasers which are linked with a fixed repetition rate difference in order to perform high-speed asynchronous optical sampling. One laser drives a high-efficiency large-area GaAs based THz emitter, the other laser is used for electro-optic detection of the emitted THz-field. At a scan rate of 9 kHz a time resolution of 230 fs is accomplished. High-resolution spectra from 50 GHz up to 3 THz are obtained and water absorption lines with a width of 11 GHz are observed. The use of femtosecond lasers with 1 GHz repetition rate is essential to obtain rapid scanning and high time-resolution at the same time.
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530 Physik
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terahertz, ultrafast spectroscopy, ultrafast laser
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BARTELS, Albrecht, Arne THOMA, Christof JANKE, Thomas DEKORSY, Andre DREYHAUPT, Stephan WINNERL, Manfred HELM, 2006. High-resolution THz spectrometer with kHz scan rates. In: Optics Express. 2006, 14(1), pp. 430-437. Available under: doi: 10.1364/OPEX.14.000430BibTex
@article{Bartels2006Highr-4765,
year={2006},
doi={10.1364/OPEX.14.000430},
title={High-resolution THz spectrometer with kHz scan rates},
number={1},
volume={14},
journal={Optics Express},
pages={430--437},
author={Bartels, Albrecht and Thoma, Arne and Janke, Christof and Dekorsy, Thomas and Dreyhaupt, Andre and Winnerl, Stephan and Helm, Manfred}
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<dcterms:abstract xml:lang="eng">We demonstrate a rapid scanning high-resolution THz spectrometer capable of acquiring THz field transients with 1 ns duration without mechanical delay line. The THz spectrometer is based on two 1-GHz Ti:sapphire femtosecond lasers which are linked with a fixed repetition rate difference in order to perform high-speed asynchronous optical sampling. One laser drives a high-efficiency large-area GaAs based THz emitter, the other laser is used for electro-optic detection of the emitted THz-field. At a scan rate of 9 kHz a time resolution of 230 fs is accomplished. High-resolution spectra from 50 GHz up to 3 THz are obtained and water absorption lines with a width of 11 GHz are observed. The use of femtosecond lasers with 1 GHz repetition rate is essential to obtain rapid scanning and high time-resolution at the same time.</dcterms:abstract>
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