Comparison of Fourier-transform analysis with wavelet-transform analysis in terahertz time-domain spectroscopy

Liying Lang; Xueguang Wang; Yuqiang Deng; Qirong Xing; Lu Chai; Qingyue Wang

doi:10.1117/12.725463

29 January 2007 Comparison of Fourier-transform analysis with wavelet-transform analysis in terahertz time-domain spectroscopy

Liying Lang, Xueguang Wang, Yuqiang Deng, Qirong Xing, Lu Chai, Qingyue Wang

Author Affiliations +

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 62795W (2007) https://doi.org/10.1117/12.725463
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

In this paper, we applied wavelet-transform to analysis the water vapor absorption spectroscopy in terahertz range, and compared with conventional Fourier-transform analysis in terahertz time-domain spectroscopy. The extracted absorption lines are in excellent agreement with the results of using Fourier-transform analysis. The results show that wavelet-transform analysis of the absorption spectrum delivers accurate absorption lines in THz range. Because the results are shown in a time-frequency domain, it gives a more intuitive image on when the absorption happens at which frequency. Combining wavelet-transform technique with THz-TDS, we hope there births a new spectroscopy: the wavelet-transform terahertz time-domain spectroscopy.

Citation Download Citation

Liying Lang, Xueguang Wang, Yuqiang Deng, Qirong Xing, Lu Chai, and Qingyue Wang "Comparison of Fourier-transform analysis with wavelet-transform analysis in terahertz time-domain spectroscopy", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62795W (29 January 2007); https://doi.org/10.1117/12.725463

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