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We apply phase modulation techniques at different wavelengths to generate microwave tones that allow us to interrogate multiplexed sensors. The interrogation technique has a resolution far below 1 pm with a simple system and no need of post-processing. This approach relies on basic concepts of microwave photonics technique operating under low coherence regime. A remarkable linear sensitivity of 1...
Centralized Radio Access Network (C-RAN) is a promising mobile network architecture to face the increasing mobile traffic demand. In this paper, we propose a detailed model to evaluate the statistical multiplexing gain achieved through C-RAN baseband pooling, and based on this model we can perform a cost analysis taking into consideration different geographical type areas (geotypes). We show the influence...
Space-division multiplexed (SDM) systems use multiple spatial-paths in multimode or multi-core fiber to increase the capacity and/or photon-efficiency carried by an optical fiber. For SDM systems to be competitive, they must outperform or have a cost advantage over parallel single mode fiber systems. The cost advantages can come from spatial integration where many spatial channels can be processed...
This paper presents the simulation investigations on the enhancement technology regarding the contact pressure sensitivity of the Fibre Bragg Grating (FBG) sensor. The FBG was embedded in a patch made of polymer material in order to increase its pressure sensitivity. The polymer coating converted the transverse pressure to longitudinal strain, which could further perturb the FBG. The strain distribution...
In this invited paper, a high-speed continuous-variable quantum key distribution (CV-QKD) system is investigated in the presence of atmospheric turbulence, which is enabled by employing the wavelength, polarization, and orbital angular momentum (OAM) states as degrees of freedom. Four-state discrete modulation is used for the key shaping for the convenience of easy generation, as well as to enhance...
Recently, random mirrors have been proposed as a method to create fiber laser cavities. This kind of cavity is based on cooperative Rayleigh scattering, which is generated along a fiber due to the material inhomogeneities presented in that fiber. In this work, basics of Random fiber lasers and different demonstrated lasing sensors systems for interrogating arrays of optical fiber sensors are shown...
In this work the penalties induced by the crosstalk in case of optical networks exploiting space-division multiplexing and coherent detection are evaluated. Different QAM modulation formats are considered.
This paper reports the experimental performance of spatial division multiplexing (SDM) optical transmission systems. These SDM systems are intended to support key short- and medium-range low-latency applications as optical fronthaul in cellular networks, point-to-point optical backhaul and baseband optical links in datacentre applications. In particular, the experimental demonstration of optical fronthaul...
Mode division multiplexing is a promising technique that enables highly parallel and compact on-chip optical communications, but its scalability has been hampered by the crosstalk so far. By exploiting supermodes in closely packed waveguide arrays, low crosstalk between waveguides can be achieved when phase mismatch condition is met. This paper considers two techniques to achieve phase mismatch: waveguide...
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