NONLINEAR EFFECTS IN OPTICAL FIBERS

The basic differential equations necessary to represent nonlinear prop agation of short and ultrashort optical pulses in &electric waveguides are derived. After introducing fundamental and higher-order soliton s olutions of the nonlinear Schroedinger equations, the possibilities of realizing soliton-based communication systems are discussed. Higher-o rder nonlinear effects associated with self-Raman gain and optical amp lification in connection with the use of active fibers are also descri bed.