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Flexible optical networking is widely proposed today by major vendors and operators as the solution that offers smooth system upgradability towards Tb/s capacities and optimized use of network resources. Latest research and development efforts proposed a variety of multi-carrier signal transmission methods with significantly increased spectral efficiency, (compared to legacy WDM), allowing the tra ...

"Manny planned tunnels are in countries of high seismicity with several Km under densely populated areas requiring high safety standards. Structural sensing with remotely interrogated fibre optic deformation sensors has a large potential usage on extended structures such as tunnels where it can be the basis for condition assessment. For this, algorithms for structural health assessment of tunnels ...