Optoelectronics is a valuable solution to scale up wireless links frequency sub-THz in the next generation antenna systems and networks. Here, we propose low-power consumption, small footprint building block for 6 G 5 new radio transmission allowing broadband capacity (e.g., 10-100 Gb/s per link beyond). We demonstrate datalink based on graphene, reaching setup limited carrier multi-Gbit/s data rate. Our device consists of graphene-based integrated optoelectronic mixer capable mixing an...

Analogue Radio over Fibre together with subcarrier multiplexing and wavelength division is proven to be more cost-efficient when compared CPRI fronthaul solutions. Furthermore, the results of allocation RF channels better exploit available modulation bandwidth commercial transceivers show that uniformly spaced channel plan efficient but susceptible interference. The ITU-T G.692 in much higher tolerance interference it consuming. Finally, proposed `mind gap' shows an acceptable compromise...

We demonstrate a technique that ameliorates the performance of bidirectional systems impaired by in-band Rayleigh crosstalk, which is common in passive optical access networks based on centralized remote wavelength feeding. The combined use suitable line coding and ad hoc postdetection electrical filtering. Therefore, it can be seamless implemented easily scalable with data rate. experimentally assess using 8B10B coded 1.25-Gb/s signal. report an increased tolerance to signal-to-crosstalk...

A novel end-to-end transport network solution is proposed to meet the operational and technical challenges of heterogeneous networks built as C-RANs with centralized base band processing CPRI links. The flexibility architecture support distributed architectures Ethernet links also described results a C-RAN proof concept demonstration are discussed. Substantiated by evolution key optical technologies, including WDM-PON based solution, we conclude that backhaul metro strategies need flexibly...

A single frequency-periodic narrow filter converts DPSK to intensity modulation in a high number of WDM channels. It also strongly enhances their tolerance chromatic dispersion and is exploited 16×10 Gbit/s transmission over 240 km G.652 fibre with no compensation.

The evolution of centralized radio access networks is discussed from a pragmatic perspective, taking into account the network and requirements. use wavelength-division multiplexing technology to support this proposed, opportunities for operators in terms operational cost, energy efficiency, reuse already deployed infrastructures, convergence are discussed.

The advent of 6G is expected to transform connectivity by necessitating robust and scalable transport networks, capable managing the escalating demands for enhanced bandwidth, negligible latency, heightened network automation. progression towards centralized radio access networks cloudification functions introduce additional requirements network. Addressing these demands, integration packet optical systems combines flexibility with high bandwidth low latency systems, aiming a balance between...

The article provides a review of the Xhaul network in terms architecture, transmission, switching, and service provisioning automation, with objective to illustrate state art indicate open issues be addressed. is new transport segment that covers first 15-20 km from access site, replacing today point-to-point fronthaul connections. Due high level capillarity deployed equipment this segment, simple downsize technology used metro aggregation networks cannot achieve sufficient cost...

The effectiveness of colorless performance- improved wavelength-division-multiplexing passive optical networks (PONs) compatible with gigabit-PON is presented. proposed solution based on a service network unit (service-ONU) for multiwavelength distribution. Mitigation Rayleigh backscattering effect and path-loss degradation demonstrated in 2.5- 10-Gb/s reflective schemes employing semiconductor-optical- amplifier electroabsorption modulator at the ONU.

We report enhanced 10 Gb/s operation of directly modulated bandwidth-limited reflective semiconductor optical amplifiers.By using a single suitable arrayed waveguide grating we achieve simultaneously WDM demultiplexing and equalization.Compared to previous approaches, the proposed system results significantly more tolerant seeding wavelength drifts.This removes need for lockers, additional electronic equalization or complex digital signal processing.Uniform C-band operations are obtained...

New challenges in power system planning, such as integration of massive amount Renewable Energy Resources (RES), global decarbonization and efficiency targets, must be addressed by the Transmission System Operator (TSO) to guarantee optimal management, reliability grid flexibility. In this context, High Voltage Direct Current (HVDC) may play a key role, providing additional benefits compared HVAC transmission line. Therefore, valid detailed model different HVDC technologies configurations is...

Multicore fibres (MCF) offer the opportunity of both increasing communication capacity as well offering enhanced flexibility in network scenario. Software-defined networks (SDN) are capable handling novel functionalities coming from physical layer with aim better exploit overall connectivity. In this paper, defragmentation is considered combined space-division multiplexing (SDM). particular, SDN-driven effective technique on a seven-core MCF demonstrated. This paper includes networking view...

We report the first experimental demonstration of 25Gb/s operation 1GHz bandwidth-limited Reflective Semiconductor Optical Amplifier based on DMT modulation and optical equalization. This combination is highly resilient to chromatic dispersion.

Sub-Nyquist time frequency packing technique was demonstrated for the first in a super-channel field trial transmission over long-haul distances. The allows limited spectral occupancy even with low order modulation formats. successfully performed on deployed Australian link between Sydney and Melbourne which included 995 km of uncompensated SMF coexistent traffic. 40 100 Gb/s co-propagating channels were transmitted together 50 GHz ITU-T grid without additional penalty. consisted eight...

We report a simple 1:25Gb/s short-reach WDM-PON exploiting self-seeded transmitters at OLT and wavelength-reuse ONUs to achieve the best combination of cost capacity. Two remodulation schemes, NRZ/NRZ IRZ/RZ are compared.

The many towers of San Gimignano, Italy, make this town unique in the world. While most have disappeared, surviving are even today a very interesting example ancient simple but high buildings. construction is surprising, method based on thick stone masonries and extraordinary mortars, with just few later exceptions where bricks were used. Equally surprising inner space, as rooms sometimes smaller than wall thickness. For each 14 studied towers, detailed surveys made internal external parts....

The use of optical transceivers in antenna array system applications requires reliable operation at high temperature. experimental characterisation a silicon photonics transceiver operating harsh environment with temperatures up to 120°C is presented and discussed. was placed inside climatic chamber it fed by an external depolarised light source. bit error rate measured, the impacts on transmission performances were analysed discussed, including reliability aspects. authors believe that...

The design and experimental characterisation of a depolarised light source for feeding remote transceiver based on silicon photonics are presented. Since the only works in TE mode, is designed to deliver, over up 10 km standard single-mode fibre links, continuous-wave with almost constant power along this polarisation direction, whatever be random rotation because link. realised by combining output two independent distributed feedback lasers, having orthogonal controlled frequency...

We demonstrate the unrepeatered and uncompensated wavelength-division-multiplexing (WDM) transmission of 16times10 Gb/s differential phase-shift keying (DPSK) channels over 140-km G.652 fiber using two commercial semiconductor optical amplifiers (SOAs) as booster preamplifier, respectively. The long span was achieved thanks to use a frequency-periodic narrow filter that simultaneously demodulates all WDM-DPSK avoids chromatic dispersion compensation. measured bit-error-rate (BER) curves show...

Error free operation assuming common FEC techniques is experimentally demonstrated for a multi-user optical access network based on 40 channel DWDM-PON infrastructure and Gigabit Ethernet 16 QAM subcarrier multiplexing transmission. Such system would support 400 users with symmetrical 1.25 Gb/s connections media independent final connectivity. To replicate actual working conditions, the experimental setup relied only commercially available components was tested realistic distance reach high...

A colorless performance-improved WDM-PON compatible with Gigabit-PON is presented. The proposed solution based on a Service-ONU for multiwavelength distribution. Mitigation of Rayleigh backscattering effect and path-loss degradation demonstrated in 2.5Gb/s 10Gb/s schemes.

This paper provides a prototype of an Electric Vehicles Load Profile Generator based on the probability density function several parameters such as arrival time, total connection energy demand, and information about vehicle's battery size charge power level charger. tool simulation, realised with Python, allows generation random EV load profiles and, in next step, simulates integration these patterns defined grid through open-source commercial software's. The Quasi-dynamic simulation...

A novel component provides simultaneous DPSK-to-IM conversion of the 100 GHz-spaced WDM channels and strongly reduces need for dispersion compensation. We exploit it in a 16 times 10 Gbit/s transmission over 240 km G.652 fiber with no compensation

The reuse of existing infrastructure whilst keeping unaffected the legacy equipment is a crucial feature for evolution gigabit passive optical networks (GPONs) towards higher capacity wavelength division multiplexed-passive (WDM-PONs). In this paper, testbed evaluation simple and cost effective GPON evolutions will be presented. A comprehensive set WDM-PON architectures based on remote wavelengths distribution upstream (US) transmission proposed. Both 2.5 Gb/s 10 (symmetric traffic) have...