Nikolaos P. Diamantopoulos

Mode-selective optical packet switching in mode-division multiplexing networks

A novel mode-selective optical packet switching, based on mode-multiplexers/demultiplexers and multi-port optical micro-electro-mechanical systems (MEMS) switches, has been proposed and experimentally demonstrated. The experimental demonstration was performed using the LP(01), LP(11a) and LP(11b) modes of a 30-km long mode-division multiplexed few-mode fiber link, utilizing 40 Gb/s, 16-QAM signals.

Cognitive, Heterogeneous and Reconfigurable Optical Networks: The CHRON Project

High degree of heterogeneity of future optical networks, stemming from provisioning of services with different quality-of-transmission requirements, and transmission links employing mixed modulation formats or switching techniques, will pose a challenge for the control and management of the network. The incorporation of cognitive techniques can help to optimize a network by employing mechanisms that can observe, act, learn and improve network performance, taking into account end-to-end goals. The EU project CHRON: Cognitive Heterogeneous Reconfigurable Optical Network proposes a strategy to efficiently control the network by implementing cognition. In this paper we present a survey of different techniques developed throughout the course of the project to apply cognition in future optical networks.

Mode-division multiplexed W-Band RoF transmission for higher-order spatial multiplexing

20Gb/s seamless 2×2 MIMO transmission of W-Band millimeter-wave signals over a 30-km modal-dispersion-compensated mode-division multiplexed link and a 2.5-m wireless path, is demonstrated for enhancing the transmission capacity in radio-over-fiber systems.

Mode-Unbundled ROADM and Bidirectional Mode Assignment for MDM Metro Area Networks

A mode-unbundled reconfigurable add/drop multiplexer (ROADM), composed of a fiber-based mode-multiplexer/demultiplexer pair and a multiport microelectromechanical systems switch, is proposed and experimentally characterized for higher data granularity in mode-division multiplexing (MDM) deployment of future metro area networks (MAN). For enabling mode-unbundling transmission, crosstalk reduction through bidirectional mode assignment is adopted. Finally, a 62-km MDM-MAN ring, composed of two mode-unbundled ROADMs and few-mode fiber spans, is experimentally demonstrated by taking advantage of bidirectionally mode assigned 40 Gb/s, 16-QAM signals.

Deployment Scenario of Mode Division Multiplexing in Metro Area Network

A deployment scenario of mode division multiplexing (MDM) in metro ring network using few-mode fibers (FMFs) is presented. A novel mode-unbundled ROADM demonstrates the finest data granularity, and bi-directional transmission can circumvent the MIMO DSP.

All-optical implementation of OFDM/NWDM Tx/Rx

We describe an innovative transceiver for both all-optical orthogonal frequency division multiplexing (AO-OFDM) and Nyquist wavelength division multiplexing (NWDM) systems, that allows flexible superchannel generation, by varying the number of the subcarriers, the modulation formats and the corresponding bit rates.

Mode division multiplexed networks

A deployment scenarios of space division multiplexing (SDM) in metro area network is presented. Comparative studies of few-mode fiber vs. multicore fiber as well as mode division multiplexed (MDM) node architectures of supermode vs. mode-unbundling are discussed.

Coherent radio-over-few-mode-fiber

W-band coherent radio-over-few-mode-fiber transmission system is presented, featuring an optical/wireless converged MIMO DSP. Power fading of radio signals incurred by mode coupling-induced crosstalk and its mitigation technique by the mode assignment and filtering are studied.

Spectrally-Spatially Flexible Optical Networking

In this paper we review the recent advancements of spectrally spatially flexible optical network design and planning. We discuss benefits/drawbacks of different approaches. Finally, opening areas of further research are presented.

Mode-unbundled ROADM for MDM networks: Characterization of Uni- and Bi-directional mode assignment

A mode-unbundled ROADM, composed of fiber-based mode-mux/demux and a multi-port MEMS switch, is proposed for MDM networks. The experimental demonstration was performed in single- and two-node configurations, for uni- and bi-directionally mode assigned QPSK and 16-QAM signals, without MIMO DSP.