A5009742236- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Photonic Crystal and Fiber Optics
- Radio Frequency Integrated Circuit Design
- Power Line Communications and Noise
- Software-Defined Networks and 5G
- Optical Coherence Tomography Applications
- Advanced Fiber Laser Technologies
- Optical Wireless Communication Technologies
- Energy Efficient Wireless Sensor Networks
- Integrated Circuits and Semiconductor Failure Analysis
- Heart Rate Variability and Autonomic Control
- CCD and CMOS Imaging Sensors
- Quantum-Dot Cellular Automata
- Parallel Computing and Optimization Techniques
- GaN-based semiconductor devices and materials
- Advanced Power Amplifier Design
- Advanced Measurement and Metrology Techniques
- Mental Health Research Topics
- Electromagnetic Compatibility and Noise Suppression
- Radiation Effects in Electronics
KDDI Research (Japan)
2014-2024
Kanazawa University Hospital
2024
Institute of Electrical and Electronics Engineers
2024
KDDI (Japan)
2015-2021
Hokkaido University
2010-2012
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...
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.
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...
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 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.
Mode-division multiplexing (MDM) using few-mode fibers (FMFs) appears as a promising technology to increase fiber capacity by few orders of magnitude and sustain the traffic demand for decades come. The potential MDM lies in its ability exploit multiple modes within single optical strand. Since 2011 first demonstrations, impressive progress has been made. In this article, we will show how most recent advances design fabrication have improved performance FMFs systems, allowed turn research...
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...
In this paper, multicore fiber (MCF), which is compatible with standard conventional single-mode fibers (SMFs), summarized. Conventional SMF systems can be upgraded to space-division multiplexing by MCF migration scenario. As applications of this, connectivity and cable ultra-high-capacity described. Transmission experiment using 400 Gb/s signals are confirmed MCF.
The total capacity of optical submarine cable systems as a global communication infrastructure must be continuously enlarged. Multi-core fibers (MCFs) have been studied methods to maximize the under electrical power and space limitations. In particular, standard cladding MCFs, which are expected high productivity mechanical reliability, attractive for early deployment in systems. this paper, we demonstrate high-capacity trans-Pacific class transmission using uncoupled 4-core fibers,...
For weakly coupled mode-division multiplexed (MDM) transmission systems, we design and implement optical coherent receiver prototypes with real-time multiple-input multiple-output (MIMO) digital signal processing to equalize two degenerate linearly polarized modes dual polarization. Using field programmable gate array circuits, real-value 8 × 2 MIMO adaptive equalization externally separated phase compensators based on the least mean square algorithm, which enables not only training but also...
This paper describes a six-mode 19-core fiber with 114 spatial modes, which was designed and fabricated for weakly-coupled mode-division-multiplexed (MDM) transmission over uncoupled cores. The 19 identical graded-index cores were packed on hexagonal lattice 62-μm pitch in ~318-μm-diameter cladding. cladding diameter is large, but still mechanically reliable by assuming 2% proof test 40-mm minimum bend radius. inter-core crosstalk negligibly suppressed the calculation indicated that 50-μm...
We demonstrate a 6-mode and 580-wavelength multiplexed transmission with an inline C+L-band erbium-doped fiber amplifier (6M-EDFA). This is the first demonstration of amplified few-mode EDFA. The 6M-EDFA designed extremely wide erbium-doping profile to cover all spatial modes population inversion uniformly, thus, suppressing differential modal gain within 5.6 dB in both C-band (1535-1563 nm) L-band (1574-1602 for total input signal power +3 dBm. As line, we use 11.3-km 19-core connect eight...
We demonstrate an O+S+C+L+U-band transmission system as upgrade scenario from a C+L-band for the first time. DWDM signals fully allocated in record bandwidth of 25 THz are successfully transmitted over 45-km deployed fibre-optic cable.
An uncoupled 125-μm-cladding 4-core multicore fibre (MCF) with record low-loss of 0.155dB/km among MCFs was realized. Span loss 60.2km MCF reduced to less than 10dB including fan-in and fan-out. Inter core crosstalk the is -60dB/100km.
Since optical submarine cable systems are a part of the global communications infrastructure, their total capacity must be continuously and dramatically enlarged. Recently, methods how to maximize transmission under electrical power limitations have been studied, it has reported that single band (C-band only) system with more fiber pairs (FPs) could promising technology. This finding triggered work on cables FPs. For further increase in FPs systems, which also space existing designs,...
Design and fabrication results of a 6-mode 19-core fiber with the highest relative core multiplicity factor 30 for weakly-coupled mode-multiplexed uncoupled-core-multiplexed transmission are detailed. Technical challenges long-haul also discussed.
In this work, we present an experimental demonstration of real-time transoceanic space-division multiplexed transmission with coupled-core multicore fibers.To compensate for modal coupling in the fibers, implement multiple-input multiple-output (MIMO) digital signal processing based on field programmable gate array circuits.Using optical receivers a MIMO, demonstrate 16channel wavelength-division coupled four-core fiber over 7200 km.The results show feasibility transmission.
We present SRS-assisted reach extension of U-band WDM transmission in deployed fiber-optic cable. It is verified that channels benefit from the reduction span loss 90-km co-propagating with S+C+L-band channels.
A 10-mode-multiplexed 10-Gbaud DP-QPSK WDM signals transmission over 81 km weakly-coupled few-mode fiber has been successfully demonstrated using 2×2 or 4×4 partial MIMO equalizer with reduced receiver DSP complexity.
The combination of spatial division multiplexing (SDM) with flexi-grid wavelength (WDM) enables optical transceivers to provide super-channels that exploit the spectral and dimensions. For first time best our knowledge, in this paper we extend SDM-WDM support sliceability make effective use resources. proposed architecture provides multiple independent spectral–spatial (i.e., slices) sharing same transceiver exploiting different spectrum/core/mode also us monitor bit error rate provisioned...
We report the first experimental demonstration of transoceanic distance real-time transmission over coupled multicore fibers. The WDM DP-QPSK signals were transmitted 7,200-km coupled-core four-core fibers by a recirculating loop and demodulated MIMO DSP.
We demonstrate the first SDN-enabled sliceable SDM-WDM transceiver providing multiple spectral-spatial super-channels spanning different cores and modes over a 11-km 6-mode 19-core fiber.We define an open API based on YANG/NETCONF for disaggregated optical networks.
A field trial of high-density 0.92-km 200-fiber cable with 5-core fibers (5CFs) was conducted for reliability tests. No degradation attenuation 5CFs observed even after installation into underground conduits and aerial area.
With the goal of establishing mode division multiplexing techniques, we performed experiments on multi-excitation spatial modes by combining first-order diffracted beams generated from hologram patterns indicated in different regions using a single SLM.