Non-blocking fault-tolerant dual photon switches with high scalability

This paper continues the construction of a fundamentally new class of system area networks (dual photon networks) with the following features: non-blocking property and static self-routing, high scalability with the maximum achievable speed and a small complexity compared to a full switch, and balancing the scalability-speed and complexity-speed ratios. These networks are implemented in an extended circuit basis consisting of dual photon switches and separate photon multiplexers and demultiplexers. We propose a method for constructing a fault-tolerant dual network with the indicated properties based on networks with the quasi-complete graph and quasi-complete digraph topologies and the invariant extension method with internal parallelization. Also, we propose a method for extending the two-stage dual network designed previously into four-stage and eight-stage dual networks with high scalability while maintaining the original network period and reducing its exponential complexity.