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25 March 2004 The limit of spectral resolution in THz time-domain spectroscopy
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This paper describes a study conducted into the limit on spectral resolution due to the dynamic range of a T-ray spectrometer. The pulsed nature of terahertz time-domain spectroscopy (THz-TDS) sets a fundamental limit on its spectral resolution. The spectral resolution of THz-TDS can be improved by increasing the duration of the temporal measurement, but is limited by the dynamic range of the system in the time-domain. This paper presents calculations and experimental results relating the temporal dynamic range of a THz-TDS system to its spectral resolution. We discuss three typical pulsed terahertz sources in terms of their dynamic range and hence achievable spectral resolution.
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Samuel P. Mickan, Jingzhou Xu, Jesper Munch, X.-C. Zhang, and Derek Abbott "The limit of spectral resolution in THz time-domain spectroscopy", Proc. SPIE 5277, Photonics: Design, Technology, and Packaging, (25 March 2004);

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