Soliton amplification in inhomogeneous optical waveguides

Soliton amplification in inhomogeneous systems is investigated in this paper. The variable coefficient nonlinear Schrodinger equation, which describes the propagation of solitons in inhomogeneous optical waveguides, is studied analytically. The analytic soliton solution is derived via the Hirota method. According to the soliton solution obtained, the soliton is amplified while the corresponding parameters are chosen properly. Furthermore, the physical effects affecting soliton amplification are discussed. The results of this paper will be valuable to improve the quality of optical amplification and integrate the optical devices.