Measurement of the SNR of Fourier Transform Spectrometers
Fourier变换光谱仪信噪比测量方法研究

A novel method for measuring and calculating the signal to noise ratio of the Fourier transform spectrometer is presented.The relationship between the method proposed and the traditional one is discussed.It is found and proved that the SNR calculated by the proposed method is about 1.5 times higher than the SNR introduced in reference.Different types of noises are introduced and the conclusion that in order to avoid the error of the magnitude of the recovered spectrum the sampling frequency of the interferogram should be higher than the Nyquist frequency is drawn.