Journal
OPTICS EXPRESS
Volume 26, Issue 14, Pages 17964-17976Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.017964
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Funding
- National Natural Science Foundation of China [61222110, 61775233]
- High-Level Talent Introduction Project of Beihang University [29816248]
- Youth-Top-Talent Support Project of Beihang University [KG12000801]
- Zhuoyue Program of Beihang University [GZ216S1711]
- National Basic Research Program of China [2014CB339800]
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We systematically investigate the data analysis methods in terahertz frequency domain spectroscopy (THz-FDS) with coherent detection. We demonstrate that the Hilbert transform method is one of the most appropriate for data processing in THz-FDS. By converting frequency-domain signal into time domain with further data processing, the system noise due to Fabry-Perot (FP) interference is greatly restrained. Accurate permittivity of lactose monohydrate is successfully extracted under the condition of the existence of atmospheric water vapor. Our work greatly promotes the development of THz spectroscopy in practical applications. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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