[Joint time-frequency analysis for removing the spectral interference of terahertz].
Guang Pu Xue Yu Guang Pu Fen Xi
; 30(12): 3169-73, 2010 Dec.
Article
en Zh
| MEDLINE
| ID: mdl-21322198
ABSTRACT
Conventional Fourier-transform mixes the frequency components of the entire temporal terahertz waveform in one frequency domain; therefore, it cannot distinguish the terahertz frequency in the main pulse from the noise frequency in the pulse tail. Thus traditional Fourier-transform produces inconsistent spectra from different scanning lengths of terahertz pulse. And the interference spectrum appears when the THz echo pulse is recorded. The authors applied wavelet-transform and removed the inconsistent spectra and the interference spectra. Wavelet-transform technique exhibited the local frequency of THz in different time locations. This technique would find applications in THz time-resolved spectroscopy.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
Zh
Revista:
Guang Pu Xue Yu Guang Pu Fen Xi
Año:
2010
Tipo del documento:
Article
País de afiliación:
China