Journal of the Optical Society of Korea

  • 제15권1호
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  • Pages.103-108
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  • 2011
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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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)
  • 투고 : 2011.01.12
  • 심사 : 2011.02.09
  • 발행 : 2011.03.25
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초록

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.

키워드

참고문헌

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  6. An approach for automatic construction of the wavelet-domain de-noising procedure for THz pulsed spectroscopy signal processing vol.486, 2014, https://doi.org/10.1088/1742-6596/486/1/012034