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http://dx.doi.org/10.3807/JOSK.2011.15.1.103

Wavelet Power Spectrum Estimation for High-resolution Terahertz Time-domain Spectroscopy  

Kim, Young-Chan (Center for Safety Measurements, Korea Research Institute of Standards and Science)
Jin, Kyung-Hwan (Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology)
Ye, Jong-Chul (Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology)
Ahn, Jae-Wook (Department of Physics, Korea Advanced Institute of Science and Technology)
Yee, Dae-Su (Center for Safety Measurements, Korea Research Institute of Standards and Science)
Publication Information
Journal of the Optical Society of Korea / v.15, no.1, 2011 , pp. 103-108 More about this Journal
Abstract
Recently reported asynchronous-optical-sampling terahertz (THz) time-domain spectroscopy enables high-resolution spectroscopy due to a long time-delay window. However, a long-lasting tail signal following the main pulse is often measured in a time-domain waveform, resulting in spectral fluctuation above a background noise level on a high-resolution THz amplitude spectrum. Here, we adopt the wavelet power spectrum estimation technique (WPSET) to effectively remove the spectral fluctuation without sacrificing spectral features. Effectiveness of the WPSET is verified by investigating a transmission spectrum of water vapor.
Keywords
Terahertz time-domain spectroscopy; Wavelet; Asynchronous optical sampling; High spectral resolution;
Citations & Related Records

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