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Optical performance monitoring (OPM) is desired for future smart optical networks. 2-D phase portrait contains fruitful waveform information, which can be a valuable tool for OPM. In this paper, we review the generation of 2-D phase portrait by our cost-effective single-channel sampling technique, and its applications for OSNR and dispersion monitoring in different systems.
The Smart Body Area Network (SmartBAN) has been proposed to support low power and low latency wireless body area networks. A SmartBAN is organized in a star topology with one hub and a group of sensor nodes. In addition to propagation delay, the uplink transmission latency of a SmartBAN is also dependent on how long a data packet generated at a sensor node has to wait prior to uplink transmission...
WDM optical systems and nonlinear effects are experiencing last years a huge investigation for performance evaluation. In this paper, and for high speed phase modulated WDM Nyquist systems, a novel method of PMD and first-order PMD (DGD) monitoring using cross phase modulation effect is presented. This technique demonstrate that in the presence of XPM effect, the states of polarization changes and...
Internet traffic volume continues to increase at a high rate every year. To handle unexpected traffic surges, link failures and growth in traffic volume, network link capacities are typically over-provisioned. To reduce the extent of over-provisioning, we proposed an application and network coordinated multi-layer architecture called ACTION. Application QoE (Quality of Experience) are translated into...
ABNO's OAM Handler is extended with big data analytics capabilities to anticipate traffic changes in volume and direction. Predicted traffic is used to trigger virtual network topology re-optimization. When the virtual topology needs to be reconfigured, predicted and current traffic matrices are used to find the optimal topology. A heuristic algorithm to adapt current virtual topology to meet both...
We discuss the possible use of photonic crystals as strain sensors. We demonstrate the feasible fabrication of a crystal having sub-micrometric polystyrene colloidal spheres in a PDMS matrix on a rubber substrate, and we demonstrate that the photonic properties change with substrate elongation according to theoretical prediction. The crystal's sensitivity to strain depends directly on interplanar...
Long-Reach Passive Optical Networks (LR-PONs) consolidates of metropolitan and access networks by extending the distance between the Central Office (CO) and the end users, which in turn simplifies the network and potentially brings cost savings. With the explosively growing of data traffic, Time and Wavelength Division Multiplexing (TWDM) technology have also been employed in LR-PON to realize high...
A multi-wavelength tuneable OTDR is realized and tested for in-service monitoring of a colourless WDM PON. The instrument regenerates the probe optical pulse by modulating, through an acousto-optic modulator, the continuous wave emission of a tuneable telecommunication laser. This setup reduces at the same time the spontaneous emission noise and the coherent Rayleigh noise. The absence of interference...
Construction, preservation, maintenance, and renewal of sustainable and resilient civil structures and infrastructure represent important challenges for a 21st-century society. Structural Health Monitoring (SHM) is a novel approach which can successfully assist in meeting these challenges by providing actionable, quasi-real-time information regarding structural performance and health condition. Fibre...
Infrared photoluminescence properties are investigated for Pr3+ containing fluoroindate glasses with formula (mol% compositions) (99-x)[40InF3−20SrF2−20BaF2−20ZnF2]:xPrF3 (x= 0.1, 0.2, 0.5, 1.0 and 2.0 mol%). Different mechanisms of population and quenching for Pr3+1D2 and 1G4 levels are shown from photoluminescence (PL), photoluminescence excitation (PLE) and decay time values. Cross relaxation...
5G technologies are a new paradigm strongly supported by the European Commission (EC) to overcome the challenges of next generation networks and aiming to tackle the novel and manifold business requirements of vertical sectors such as Industry 4.0, Smart Grids, Smart Cities, and eHealth. Extraordinarily high speeds and capacity, multi-tenancy, fixed and wireless access network convergence, self-X,...
Radio Access Network needs to evolve to meet 5G communication requirements. This must be supported by the development of underlying fiber-based transport technologies with the strong emphasis on extending the reach, improving the bandwidth-efficiency, and providing high reliability of the mobile fronthaul (MFH) part. One of the essential aspects in the envisioned advent of dense deployment of small-cells...
Incremental planning is performed periodically to decide how a backbone optical network has to be updated to serve the forecast traffic during the next planning period. Based on reliable traffic prediction, new equipment is installed and its capacity is ready to be used. Nonetheless, due among others to the introduction of new services, exact prediction is not usually available, which leads to install...
In this paper the performance of a new optical sensor based on a bundle of optical fibres is analysed. An inductive sensor with proven capacity to carry out blade tip timing measurements in real aircraft engines applications is used as reference. The results of the optical sensor show a good correlation with those provided by the inductive sensor, demonstrating the suitability of the optical sensor...
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