Sampled fiber grating dispersion compensation technology based

Abstract. Reflective spectrum of sampled grating was analyzed using transfer matrix method. Dispersion compensator was designed by selecting the length of sampled grating, sampled period, sampled rate, chirp coefficient and some kind of appropriate parameters. In multi-channel dispersion compensation simulation experiment, the reflective spectrum of sampled grating was even and reflectivity was nearly above 90%. Time delay spectrum has very good consistency and the best result was that delay jitter was less than 40ps. Dispersion diagram was also even, so the positive and negative dispersion can be compensated. Pure phase sampled function was designed using particle swarm optimization algorithm. Highly uniform and low energy band grating was created. Multi channel sampled grating was made in tunable dispersion compensation. Introduction. It was a current research focus on compensating every wavelength channel of dispersion in DWDM optical fiber communication system using a single sampled fiber grating. Due to fiber materials dispersion, the different frequency components of light pulse have different group velocity in optical fiber transmission.Therefore it needs different time arriving at the transmissio