This book deals with the generation of solitons in a nonlinear fiber Bragg grating. Further, the soliton study has been carried out both in resonant and non-resonant media. Optical soliton is a light pulse that arises due to the dynamical balancing effects of chirping produced by dispersion (linear effect) and self-phase modulation (nonlinear effect). Undoubtedly, solitons have been one of most researched areas in the field of nonlinear fiber optics owing to the possibility of realizing dispersion-free fiber communication networks. It is envisioned that in this age of exploding bandwidth requirement, solitons will play an indispensable role, especially, in telecommunication industry.