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Optical networks with multi-core fibers can replace several electronicsnetworks with a single topology. Each electronic link is replaced by a singlefiber, which can save space, weight, and cost, while having better segregationand EMI resistance. This is, for instance, of high interest in safety-criticalcyber-physical systems, such as aircraft avionics networks. Finding the optimaltopology requires finding the optimal number of components, componentlocations, inter-meshing, and signal routing, while assuring the appropriateoptical power level at each participating device. A Mixed-integer LinearProgramming (MILP) representation is presented for the optimization of thetopology of optical multi-core fiber networks. The optimization approachretrieves a globally optimal topology with respect to weight or cost, i.e. itbuilds the optimal network topology from a set of switch and cable types, whichdiffer in the number of fibers, attenuation, connectors, and other properties.The novelty of our approach is the consideration of translucent and opaqueoptical switches as well as the representation of cable and device attenuationdirectly in the MILP constraints. Moreover, arbitrary installation and routingresource restrictions are considered. The application of the approach to fivededicated scenarios yields in each case an optimal solution and validates ourmethod. The application to an excerpt of an aircraft cabin network shows theretrieval of the global optimum in less 30 min for a topology with 48 signalsand 23 components.

Multi-core Fiber and Power-limited Optical Network Topology Optimization with MILP