Dispersion compensation in silica doped fiber using soliton transmission technique over cascaded FBG

The object of this study is to enhance dispersion compensation to maximize transmission bit rate in single mode silica fibers. This is achieved through a proposed model that starts with finding the optimal operating parameters for single mode silica fibers. These optimal operating parameters lead to near zero dispersion due to the nature of chromatic dispersion which mainly consists of material dispersion and waveguide dispersion. The proposed model employs soliton transmission technique, where the propagated pulse suffers the effects of nonlinearity self-phase modulation that shrinks the pulse in opposite effect to the chromatic dispersion. The balancing between chromatic dispersion and nonlinear effects will generate a soliton wave which propagates over a long transmission distance without any change. The proposed model consists of four identical stages cascaded apodized uniform fiber Bragg gratings and a soliton modulator. Different apodization functions are investigated. The maximum transmission bit rate per channel is 1.9932 Gbps of the proposed model with raised cosine apodized fiber Bragg grating and soliton at input signal wavelength = 1.70 µm, differential refractive index = 0.001, ambient temperature = 283 K, while at the same conditions the maximum transmission bit rate per channel of soliton only is 0.0452 Gbps.