Efficiency of Transmission Distortion Compensation Using Optical Backpropagation

In this paper, we present the fiber dispersion and nonlinearity compensation scheme using an optical backpropagation module (OBP) placed at the receiver for the long haul 56 Gbit/s DQPSK system. The OBP is realized by fiber Brag gratings (FBGs) and highly nonlinear fibers (HNLFs). The compensation effective of the mid-link OPC configuration is also investigated for comparison. The study shows that, receiver-based OBP is a good solution for the optical network.