Abstract:

A laser reference interferometer to eliminate the distortion of recovery spectrum caused by piezoelectric ceramic’s non-linear modulation in Fiber Fourier Transform Spectrometer (FFTS) was designed. It can offer equal sampling intervals for sampling tested source. It also can provide the basis calibration for the tested spectrum. It acquired the interference signal of He-Ne laser whose wavelength is 632.8nm by this FMI. Fourier Transform algorithm is used to calculate the spectrum. The difference between the spectrum acquired by our experiment and by traditional grating spectrometer are also analyzed which can present helpful reference to develop FFTS further.

Key words: fiber and waveguide optics, laser reference interferometer, optical-Fiber Michelson interferometer, Fourier transform spectroscopy, spectrum measurement