ABSTRACT
Optical signals propagating in a fiber optic link will be distorted due to fiber dispersion and nonlinearity. Fiber dispersion can be simply compensated using a dispersion compensating fiber that has a dispersion coefficient with the opposite sign of that of the transmission fiber. Midpoint optical phase conjugation may be considered as an optical back propagation (OBP) scheme to compensate for fiber dispersive and nonlinear effects. Using the minimum area mismatch technique, the optical component count in the OBP system can be reduced as compared to the uniform step size, to achieve the same performance. The dispersion-decreasing fiber can be fabricated by tapering the fiber during the drawing process, which alters the waveguide contribution to the dispersion.
