The Numerical Simulation of Two Kinds of Sample Fiber Gratings Dispersion Compensator

In the paper, we investigate the reflect spectrum and time delay of two kinds sampling fiber gratings which is used in the OTDM/DWDM transmission systems. We analyze the relations between the sample rate and the channel numbers of the binary sampling gtatings for the first time, the counting method of multi-channel numbers about the binary sampling gtatings is proposed by means of the numerical simulation, which multi- channel numbers is decided by the sample rate. Then, we analyzes the chirp coefficient c1 and the c2 value limit when the binary sample grating length is to maintain unchanged, the c1 and the c2 are not too big or too small. In the latter part of the paper, we investigate the reflect spectrum and time delay of the sinc sample gtatings, which simulation results confirms the correctness of the sinc sample gratings theory by the experimental in literature. Moreover, we analyzed the relation between the modulation of two kinds of sampling gratings and the dispersion compensation result.