Design and performance evalauation of an optical coding scheme for PON monitoring

Optical coding has numerous properties that make its application to remote monitoring and failure detection in passive optical networks very attractive. Several approaches for encoder implementation have been proposed. One of them consist of a couple of fiber Bragg gratings forming a cavity producing multi-level periodic codes. In this work we propose and evaluate the performance of two new encoder schemes based on this premise. These new encoders generate codes with Hamming weight 2 and 3 in order to improve the performance of multi-level periodic codes. We observe that the proposed coding schemes show a better performance under certain scenarios.