The Data Analysis of Continuous Wave Terahertz Spectrometer in Time Domain

Oscillations caused by the Fabry-Perot interference in the amplitude of the coherent continuous wave terahertz frequency-domain spectrometer (THz-FDS) are always the largest noise. By Hilbert transformation method, the complete spectrum can be calculated and analysis, and the homologous time-domain signal can also be calculated by inverse fast Fourier transform (IFFT). The oscillations in the amplitude of signal can be restrained by processes in time domain.