A5086292750- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Software-Defined Networks and 5G
- Advanced Fiber Optic Sensors
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- PAPR reduction in OFDM
- Neural Networks and Reservoir Computing
- Power Line Communications and Noise
- Optical Wireless Communication Technologies
- Optical Coherence Tomography Applications
- Network Traffic and Congestion Control
- Advanced MIMO Systems Optimization
- Telecommunications and Broadcasting Technologies
- Satellite Communication Systems
- Orbital Angular Momentum in Optics
- Cloud Computing and Resource Management
- Mobile Agent-Based Network Management
- Advanced Wireless Communication Techniques
- Interconnection Networks and Systems
- Error Correcting Code Techniques
- Distributed and Parallel Computing Systems
KDDI Research (Japan)
2015-2024
KDDI (Japan)
2011-2024
Saitama Prefecture
2018-2022
Furukawa Electric (United Kingdom)
2014-2019
NTT (Japan)
2017
Centre Tecnologic de Telecomunicacions de Catalunya
2010-2013
Tohoku University
1995-2002
Internet of Things (IoT) requires cloud infrastructures for data analysis (e.g., temperature monitoring, energy consumption measurement, etc.). Traditionally, services have been implemented in large datacenters the core network. Core offers high-computational capacity with moderate response time, meeting requirements centralized low-delay demands. However, collecting information and bringing it into one infrastructure is not a long-term scalable solution, particularly as volume IoT devices...
Over 10 peta-bit/s transmission has been experimentally demonstrated for the first time using 11.3-km-length low-DMD 6-mode 19-core fibre across C+L band. Q-factors of all 84,246 SDM/WDM channels modulated with 12-Gbaud DP-64QAM/16QAM exceeded assumed FEC limits.
Partial multiple-input multiple-output (MIMO)-based weakly coupled mode-division multiplexing (MDM) transmission is proposed to reduce the MIMO matrix size in MDM. This technique can mitigate burden of processing for high-order few-mode fiber (FMF) transmission. In this paper, we first show that modal XT be sufficiently suppressed over C+L band using a FMF and highly mode-selective multiplexer/demultiplexer. Next, 10-mode-multiplexed 336-WDM dual-carrier 12-Gbaud dual-polarization-quadrature...
Space-division multiplexing (SDM) is an attractive technique for dramatically enhancing the transmission capacity in a single optical fiber. Recently, ultradense SDM experiments with spatial multiplicity of over 100 have been reported by using few mode multicore fibers (FM-MCFs). Considering maximum around Tb/s single-mode single-core fiber experiments, FM-MCF more than channels expected to reach 10 peta-b/s; however, has limited 2 peta-b/s. In this paper, we demonstrate 739 WDM 12-Gbd dual...
We demonstrate 140.7-Tbit/s, 7,326-km transmission of 7×201-channel 25-GHz-spaced Super-Nyquist-WDM 100-Gbit/s optical signals using seven-core fiber and full C-band EDFAs. The record capacity-distance product 1.03 Exabit/s·km is achieved.
The maximum data throughput in a single mode optical fibre is function of both the signal bandwidth and wavelength-dependent signal-to-noise ratio (SNR). In this paper, we investigate use hybrid discrete Raman & rare-earth doped amplifiers to enable wide-band gain, without spectral gaps between amplification bands. We describe widest continuous coherent transmission experimentally demonstrated date 16.83 THz, achieved by simultaneously using S-, C- L-bands. variation parameters over...
We present space-division multiplexed transmission with spatial multiplicity over 100 using weakly-coupled-6-mode uncoupled-19-core fiber. Suppressing mode coupling and core-to-core crosstalk, MIMO complexity can be reduced. The record aggregate spectral efficiency 345 bit/s/Hz is achieved.
Software defined networking and OpenFlow, which allow operators to control the network using software running on a operating system within an external controller, provide maximum flexibility for operator network, match carrier's preferences given its centralized architecture, simplicity, manageability. In this paper, we report field trial of OpenFlow-based unified plane (UCP) multilayer multigranularity optical switching networks, verifying overall feasibility efficiency, quantitatively...
Software defined networking (SDN) and flexible grid optical transport technology are two key technologies that allow network operators to customize their infrastructure based on application requirements therefore minimizing the extra capital operational costs required for hosting new applications. In this paper, first time we report design, implementation & demonstration of a novel OpenFlow SDN unified control plane allowing seamless operation across heterogeneous state-of-the-art packet...
A control plane is a key enabling technique for dynamic and intelligent end-to-end path provisioning in optical networks. In this paper, we present an OpenFlow-based spectrum sliced elastic networks, called OpenSlice, IP traffic offloading. Experimental demonstration numerical evaluation show its overall feasibility efficiency.
We experimentally present a proof-of-concept demonstration of OpenFlow-based wavelength path control for lightpath provisioning in transparent optical networks, assessing its overall feasibility and quantitatively evaluating the network performances.
Ultra-dense spatial-division multiplexing (SDM) is achieved by mode multiplexed technique with multiple cores in a single fiber, namely few-mode multi-core fiber. Using 9.8-km six-mode nineteen-core we demonstrate an ultra-dense SDM transmission of 16-channels wavelength-division-multiplexed (WDM) dual-polarization quadrature phase shift keying signals, achieving record spatial multiplicity 114. With the help Super-Nyquist WDM techniques 4.5-THz bandwidth full C-band, 2.05 Pbit/s over...
We show super-Nyquist-WDM transmission technique, where optical signals with duobinary-pulse shaping can be wavelength-multiplexed frequency spacing of below baudrate. Duobinary-pulse reduce the signal bandwidth to a half baudrate while controlling inter-symbol interference compensated by maximum likelihood sequence estimation in receiver. First, we experimentally evaluate crosstalk characteristics as function channel between dual-channel DP-QPSK shaping. As result, penalty almost negligible...
We demonstrate ultra-dense SDM transmission of 360-channel Super-Nyquist-WDM DP-QPSK signals over 9.8-km 6-mode 19-core fiber, achieving the record fiber capacity 2.05 Pbit/s (360WDM×114SDM×50Gbit/s) with highest aggregate spectral efficiency 456 bit/s/Hz.
In the evolution from opaque networks, using 3R regenerators and OEO conversions for every wavelength channel, towards transparent relying on end-to-end all-optical connections, translucent networks is considered as an intermediate step. A network a cost-efficient infrastructure between that aims at attaining adequate trade-off construction cost (i.e., due to high of regenerators) service provisioning performance optical signal quality). This article addresses dynamic connections within...
OpenFlow, as an open-source protocol for network virtualization, is also widely regarded a promising control plane technique heterogeneous networks. But the utilization of OpenFlow to wavelength switched optical has not been investigated. In this paper, first time, we experimentally present proof-of-concept demonstration OpenFlow-based path lightpath provisioning in transparent We propose two different approaches (sequential and delayed approaches) setup (active passive release by using...
A path computation element (PCE) is briefly defined as a control plane functional component (physical or logical) that able to perform constrained on graph representing (a subset of) network. stateful PCE consider the set of active connections, and its development motivated by fact such knowledge enables deployment improved, more efficient algorithms. Additionally, said be if it also affect (modify suggest modification state connections. thus not only use connections available information...
A multidomain optical transport network composed of heterogeneous technologies (e.g., flexi/fixed-grid circuit switching and packet switching) control plane centralized OpenFlow or distributed GMPLS) does not naturally interoperate, a orchestration mechanism is required. orchestrator allows the composition end-to-end service provisioning across networks comprising different technologies. Software-defined networking (SDN) key technology to address this requirement, since separation data...
We demonstrate the first 7-core multicore erbium-doped fiber amplified (MC-EDFA) transmission of 40 x 128-Gbit/s PDM-QPSK signals over 6,160-km (MCF). The crosstalk (XT) from all other 6 cores a MC-EDFA and 55-km length MCF are about -46.5 dB -45.6 at center core, respectively. core-to-core rotation approach every span is used to average XT cores. averaged optical signal-to-noise ratio (OSNR) after 15.6 with 0.1 nm resolution bandwidth. Q-factor channels surpasses threshold...
A world record capacity 118.5 Tbit/s transmission through optical fiber with a 125 micron cladding diameter was achieved using low loss and 316 km-long full space division multiplexing link incorporating multiple vendor technologies.
The mode-division-multiplexing (MDM) transmission technique using a few-mode fiber (FMF) has been investigated to overcome the theoretical limitation of capacity single-mode fiber. In MDM transmission, multiple-input multiple-output (MIMO) digital signal processing (DSP) is generally required on receiver side compensate for modal crosstalk (XT) between spatial modes. However, computational cost high, especially high-order systems that use many To reduce MIMO matrix size, with partial...
ITU-T Recommendation G.694.1 defines normative DWDM frequency grids, each being a reference set of values that correspond to allowed nominal central frequencies, obtained using fixed channel spacing (e.g., 12.5 GHz, 25 50 GHz or 100 GHz). This rigid, grid-based approach does not seem well adapted for data rates beyond Gb/s, is particularly inefficient when whole wavelength assigned lower rate optical path, and flexible enough multi-rate systems . Consequently, the next generation networks...
We confirm the feasibility of 100-Tbit/s-class trans-oceanic SDM transmission. Using seven-core fiber spans with full C-band EDFAs, 7 × 264-channel quasi-Nyquist-WDM 60-Gbit/s PDM-QPSK signals are transmitted over 6,370 km.
We report a world first field trial of an OpenFlow-based unified control plane for multilayer multi-granularity optical networks, verifying its overall feasibility and efficiency, quantitatively evaluating the latencies end-to-end path creation restoration.
We propose a novel mode multiplexer based on phase plates followed by Mach-Zehnder interferometer (MZI) with image inversion. After the higher-order modes are selectively converted from fundamental linear-polarized (LP) plates, coupled without loss using MZI inversion, in which original spatial pattern and inverted of optical signal interfered. Our scheme is also applicable to coupling degenerated LP such as LP(11a) LP(11b). First, we numerically experimentally evaluate performance converter...