Demonstration of long-reach PON using 10 Gb/s 3R burst-mode wavelength converter

Long-reach optical access networks promise significant cost savings. To merge existing metro and access networks to a single long-reach network, the long-reach technology has to address not only the power loss and fiber dispersion problems but also mismatch between two merged entities in terms of wavelengths and operational modes, especially during the transition period when support of legacy services is still required. In this letter, we demonstrate a long reach network employing a 10 Gb/s burst-mode O/E/O wavelength converter. The converter can simultaneously address the power loss, dispersion, and mismatch problems by a compact assembly. Two upstream wavelengths located in the 1310 nm and 1550 nm windows in the access section are converted to a DWDM wavelength of 1554.13 nm in the metro section. Error-free performance is achieved with a loud/soft ratio of 10 dB at a sensitivity of −27 dBm and the overhead for the burst-mode operation is as low as 0.512%

Ultrahigh-capacity optical-wireless communication using 2D gratings for steering and decoding of DPSK signals

We demonstrate the use of a 2D-gratings beam-steering device also as a demodulator for multiple differentially-encoded optical-wireless signals. Using this novel concept, ~2bits/sec/Hz spectral-efficiency was achieved without any change in the system compared to on-off-keying

Experimental Demonstration of mm-Wave 5G NR Photonic Beamforming Based on ORRs and Multicore Fiber

[EN] A photonic beamformer system designed for nextgeneration 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 Si3N4 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).This work was supported in part by the Fundacion BBVA Leonardo HYPERCONN Project, in part by the Spain National Plan under Grant MINECO/FEDER UE TEC2015-70858-C2-1-R XCORE and Grant GVA AICO/2018/324 NXTIC, and in part by the Dutch FreeBEAM projects. The work of M. Morant was supported by Spain Juan de la Cierva under Grant IJCI-2016-27578. The work of A. Trinidad was supported by Dutch NWO Zwaartekracht Integrated Nanophotonics.Morant, M.; Trinidad, A.; Tangdiongga, E.; Koonen, T.; Llorente, R. (2019). Experimental Demonstration of mm-Wave 5G NR Photonic Beamforming Based on ORRs and Multicore Fiber. IEEE Transactions on Microwave Theory and Techniques. 67(7):2928-2935. https://doi.org/10.1109/TMTT.2019.28944022928293567

Photonic integrated circuits employing multi-core fiber for broadband radio beamsteering (Invited)

This paper presents an optical beamforming network based on a photonic integrated circuit employing a weaklycoupled multi-core fiber to connect the different antenna elements. The proposed beamformer enables a centralized control of the resulting steering angle. By means of wavelength tuning, fast and dynamic configuration of the induced delay (and associated beam steering angle) is achieved remotely. The experimental results confirm high throughput transmission (> 10 Gbps) with electrical data signals with up to 3GHz bandwidth in the 24 GHz RF band (K-band). Wireless transmission of 16QAM-modulated, 1.5 GHz-wide signals is demonstrated in the laboratory from –26˚ to 33˚ providing a scanning range of 59˚

A 10 Gb/s Passive-Components-based WDM-TDM Reconfigurable Optical Access Network Architecture

We propose a cost-effective, reconfigurable optical access network by employing passive components in the remote node and dual conventional optical transceivers in ONUs. The architecture is demonstrated with bidirectional transmission at 10 Gb/s

10Gb/s Bi-directional Symmetric WDM-PON System based on POLMUX Technique with Polarization Insensitive ONU

We demonstrated 10Gb/s bi-directional symmetric transmission based on polarizationdivision multiplexing with a centralized light source. One of two orthogonal polarization states carries downstream data while the other un-modulated state is used for upstream modulation

In-home networks integrating high-capacity DMT data and DVB-T over large-core GI-POF

[EN] The low-cost in-home distribution of full-standard digital TV jointly with high-bitrate data using 50 m long 1 mm core diameter gradedindex plastic optical fiber (GI-POF) is proposed and experimentally demonstrated. Discrete multitone (DMT) modulation is demonstrated to provide an adaptive bitrate which can spectrally coexist with digital video broadcasting-terrestrial (DVB-T) signals in 470-862 MHz. A 3 Gb/s DMT signal and two DVB-T channels are generated, transmitted and received exhibiting excellent performance. © 2012 Optical Society of America.This work has been supported in part by the European Commission through the FP7 ICT-4-249142 FIVER project, and by the Spain project IPT-430000-2010-072 IT-HOGAR.Beltrán Ramírez, M.; Shi, Y.; Okonkwo, C.; Llorente Sáez, R.; Tangdiongga, E..; Koonen, T. (2012). In-home networks integrating high-capacity DMT data and DVB-T over large-core GI-POF. Optics Express. 20(28):29769-29775. https://doi.org/10.1364/OE.20.029769S29769297752028Koonen, A. M. J., van den Boom, H. P. A., Martinez, E. O., Pizzinat, A., Guignard, P., Lannoo, B., … Tangdiongga, E. (2011). Cost optimization of optical in-building networks. Optics Express, 19(26), B399. doi:10.1364/oe.19.00b39

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

Subsystems for future access networks

Current evolution and tendencies of Telecom Networks in general and more specifically optical Metro and Access Networks and their convergence are reported. Based on this evolution, a set of research lines are foreseen regarding subsystems and devices as: high speed optical sources, modulators and receivers, for the next generation of Passive Optical Networks. The ICT project EURO-FOS is achieving European level cooperative research among academia and industry, enabling future telecommunication networks

All-Optical Techniques Enabling Packet Switching with Label Processing and Label Rewriting, Journal of Telecommunications and Information Technology, 2009, nr 1

Scalability of packet switched cross-connects that utilize all-optical signal processing is a crucial issue that eventually determines the future role of photonic signal processing in optical networks. After reviewing several labeling techniques, we discuss label stacking and label swapping techniques and their benefits for scalable optical packet switched nodes. All-optical devices for implementing the packet switch based on the labeling techniques will be described. Finally, we present a 1×4 all-optical packet switch based on label swapping technique that utilizes a scalable and asynchronous label processor and label rewriter. Error-free operation indicates a potential utilization of the swapping technique in a multihop packet-switched network