New architecture for reconfigurable WDM-PON networks based on SOA gating array

Abstract A new architecture of reconfigurable WDM-PON networks for the dynamic capacity allocation is proposed and experimentally demonstrated. The architecture based on an SOA gate allows 1µs switching time to the re-allocation of wavelength resources

Wavelength-converted long-reach reconfigurable optical access network

Next generation optical access networks should not only increase the capacity but also be able to redistribute the capacity on the fly in order to manage more fluctuated traffic patterns. Wavelength reconfigurability is the instrument to enable such capability of network-wide bandwidth redistribution since it allows the dynamic sharing of both wavelengths and timeslots in WDM-TDM optical access networks. However, reconfigurability typically requires tunable lasers and tunable filters at the user side, resulting in cost-prohibitive optical network units (ONU). In this paper, we propose a novel long-reach reconfigurable architecture based on the concept of cyclic-linked flexibility to address the cost-prohibitive problem. The network-wide bandwidth redistribution capability is archived, even though ONUs are equipped only with legacy GPON and XPON transceivers

The merits of reconfigurability in WDM-TDM optical in-building networks

\u3cp\u3eBlocking performance of an optical WDM-TDM in-building network is significantly improved by dynamic wavelength routing. We analyse optimum clustering of users which reduces system complexity while largely preserving network performance improvement.\u3c/p\u3

High-capacity dynamic indoor all-optical-wireless communication system backed-up with millimeter-wave radio techniques

\u3cp\u3eWe propose a full-duplex dynamic indoor optical-wireless communication system using a crossed pair of diffraction gratings and photonic-integrated circuits with multicasting capability of 10-Gb/s on-off-keying and >40-Gb/s discrete-multitone data per user, backed up by a 60-GHz radio fallback system, with shared capacity of ∼40 Gb/s to realize reconfigurable and reliable high-capacity links to wireless users equipped with localization and tracking functionalities. The use of semiconductor optical amplifiers integrated with reflective electroabsorption modulators allows us to provide cost-efficient reflective transmitters at the user terminals in the upstream using centralized light sources and wavelength reuse technique. The 60-GHz radio fallback system allows us to cope with line-of-sight blocking in the optical-wireless links, thereby significantly enhancing the reliability of the wireless communication system.\u3c/p\u3

Steerable pencil beams for multi-Gbps indoor optical wireless communication

We report a novel optical wireless communication (OWC) system solution that supports multi-Gbps (Gigabit-per-second) capacity for indoors. Narrow beams, termed as pencil beams, are directed to wireless users using a tunable laser and a passive diffractive optical element. This enables a wide coverage of ultra-high-capacity communication links to serve multiple network users simultaneously. Experimental results demonstrating data rates of up to 10 Gbps, with on–off keying modulation format, over a distance of more than 2.5 m, are reported. Error-free links beam-steered over a total wavelength range of 130 nm, with steering angle of 17.16°, have been achieved. This system is proposed for short-range OWC and is promising for seamless integration in in-building optical networks. © 2014 Optical Society of Americ

5G NR multi-beam steering employing a photonic TTD chip assisted by multi-core fiber

\u3cp\u3eBeam steering demonstration employing integrated optical ring resonators (ORRs) and multi-core fiber with multiple beams at 17.6 GHz and 26 GHz obtains 103.5° beam separation. A 5G system with 4×1 beamforming at 26 GHz provides up to 16.8 Gbps with 20° beam steering.\u3c/p\u3

Experimental demonstration of mm-Wave 5G NR photonic beamforming based on ORRs and multicore fiber

\u3cp\u3eA photonic beamformer system designed for next-generation 5G new radio (5G NR) operating in the millimeter waveband is proposed and demonstrated experimentally, including its performance characterization. The photonic beamforming device is based on optical ring resonators (ORRs) implemented on Si\u3csub\u3e3\u3c/sub\u3eN\u3csub\u3e4\u3c/sub\u3e and assisted with multicore fiber (MCF) to feed different antenna elements (AEs). Fast-switching configuration of the ORRs is performed changing the operating wavelength, as tuning the wavelength modifies the coupling coefficient of the rings and, consequently, the induced time delay. Multibeam operation is evaluated at 17.6- and 26-GHz radio keeping the ORRs' configuration. The beamforming performance is evaluated using single-carrier signals with up to 128 quadrature amplitude modulation over up to 4.2-GHz electrical bandwidth. The experimental beamforming system with two AEs provides up to 21 Gb/s per user, while the beamforming system with four AEs provides up to 16.8 Gb/s per user. Wireless transmission confirms that changing the wavelength from 1545.200 to 1545.195 nm modifies the beam steering from 11.3° to 23° with 26-GHz signals (5G NR pioneer band in Europe).\u3c/p\u3

Demonstration of traffic control and WDM routing in all-optical data vortex node

Abstract: We demonstrate all-optical traffic control and self-routing of WDM optical packets in a cascaded two-node all-optical Data Vortex switching node. In the experiment, WDM optical packets are successfully routed while maintaining a BER of 10 -10 or better