The effect of Direct Current(DC) apodization on the Fiber Bragg Gratings(FBG) was investigated with mode-coupling theory and experiment,and the relationship of the DC apodization and the grating chirp was given.

Good performance of chirped fiber Bragg gratings obtained by asymmetrically one-side exposure apodization;

cosine-shaped and elliptical diaphragms are adopted to achieve the apodization of the instrumental function curve,and their respective theoretical instrumental resolutions are calculated.

Sectional apodization is used on chirped phase-shifted grating to obtain ap.

As a new and challenging type of imaging spectrometer,its successful launch implies IFTS will play an important role in hyperspectral remote sensing applications,in which apodization function is an important part of interferogram pre-processing,and it has a powerful effect on the accuracy of reconstructed spectra.

The performance of linearly chirped gratings is optimized by designing and changing the parameters of apodization functions,aiming at some issues such as the unexpectedly fluctuating group delay ripple(GDR) in chirped fiber Bragg grating(CFBG) which are applied to achieving all-optical dispersion compensation in 40 Gb/s optical communications.