One of the main issues with optical networks is the problem of blocking that affects the performance of the network. Several approaches have been established in order to turn a blocking network into a non-blocking one. These approaches can be classified as strictly non-blocking, wide sense non-blocking and rearrangeably non-blocking. Benes network is a long established rearrangeable network to connect large switching elements. This network has the characteristic of providing multiple paths for same output request. For providing different paths several routing algorithms have been proposed in...