A5026581645- Optical Network Technologies
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Advanced Optical Network Technologies
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Laser Applications in Dentistry and Medicine
- Photonic Crystal and Fiber Optics
- Oral microbiology and periodontitis research
- Advanced Fiber Optic Sensors
- Orbital Angular Momentum in Optics
- Dental Erosion and Treatment
- Enzyme Production and Characterization
- Dental Trauma and Treatments
- Millimeter-Wave Propagation and Modeling
- Salivary Gland Disorders and Functions
- Microbial Metabolites in Food Biotechnology
- Probiotics and Fermented Foods
- Laser-Matter Interactions and Applications
- Terahertz technology and applications
- Dental Health and Care Utilization
- Optical Wireless Communication Technologies
- Antimicrobial Peptides and Activities
- Radio Frequency Integrated Circuit Design
- Endodontics and Root Canal Treatments
Technical University of Denmark
2016-2025
Ørsted (Denmark)
2013-2022
University of York
2022
National Institute of Information and Communications Technology
2006-2018
Keio University
2018
NTT (Japan)
2003-2017
Tianjin University
2016
Zhejiang University
2016
Osaka Prefecture University
2015
Fujikura (Japan)
2015
We demonstrate 1.01-Pb/s transmission over 52 km with the highest aggregate spectral efficiency of 91.4 b/s/Hz by using low-crosstalk one-ring-structured 12-core fiber. Our multi-core fiber and compact fan-in/fan-out devices are designed to support high-order modulation formats up 32-QAM in SDM transmission.
Research effort of most advanced optical infrastructure technologies named “EXAT: Extremely Advanced Transmission” towards the next few decades and beyond are described, enabling well over Peta bit/s per fiber link capacity Exa-class network throughput.
Optical fibers have often been considered to offer effectively infinite capacity support the rapid traffic growth essential our information society. However, as demand has grown and technology developed, we begun realize that there is a fundamental limit fiber of ~ 100 Tb/s per for systems based on conventional single-core single-mode optical transmission medium. This arises from interplay number factors including Shannon limit, nonlinearities, fuse effect, well amplifier bandwidth. article...
Photonic generation of Terahertz (THz) carriers displays high potential for THz communications with a large tunable range and modulation bandwidth. While many photonics-based generations have recently been demonstrated discrete bulky components, their practical applications are significantly hindered by the footprint energy consumption. Herein, we present an injection-locked heterodyne source based on generic foundry-fabricated photonic integrated circuits (PIC) attached to uni-traveling...
A possible mechanism of acquired acid resistance lased enamel was proposed on the basis investigations optical properties, compositional and structural changes permeability unlased human dental enamel. Lased showed a high positive birefringence, suggesting formation 'microspaces' in No new products were found, though decrease lattice strain slight a-axis contraction recognized compared with The contents water, carbonate organic substances reduced Gradual birefringence observed during...
100 Gbit/s × 10 channel (1 Tbit/s) optical signals from a single supercontinuum WDM source are successfully transmitted over 40 km dispersion-shifted fibre using 400 GHz channel-spaced arrayed-waveguide grating MUX/DEMUX as well Gbit/s–10 all-optical TDM MUX/DEMUX.
Specimens of human dental enamel were topically applied with solutions sodium fluoride (NaF) or acidulated phosphate (APF) before and after laser irradiation. APF application irradiation caused a remarkable increase in acid resistance the enamel, while showed lesser effect, similar to either treatment alone alone. These results consistent observations made using scanning electron microscope. produced greater uptake than irradiation, as shown by probe microanalyzer. NaF application, even when...
To accommodate the demand of exponentially increased global wireless data traffic, prospective rates for communication in market place will soon reach 100 Gb/s and beyond. In lab environment, transmission throughput has been elevated to level over attributed development photonic-assisted millimeter wave terahertz (THz) technologies. However, most recent demonstrations with are based on spatial or frequency division multiplexing techniques, resulting system's complexity energy consumption....
To accommodate the ever increasing wireless traffic in access networks, considerable efforts have been recently invested developing photonics-assisted communication systems with very high data rates. Superior to photonic millimeter-wave systems, terahertz (THz) band (300 GHz-10 THz) provides a much larger bandwidth and thus promises an extremely capacity. However, capacity potential of THz has by no means achieved yet. Here, we successfully demonstrate 160 Gbit/s transmission using single...
We demonstrate dense SDM transmission of 20-WDM multi-carrier PDM-32QAM signals over a 40-km 12-core × 3-mode fiber with 247.9-b/s/Hz spectral efficiency. Parallel MIMO equalization enables 21-ns DMD compensation 61 TDE taps per subcarrier.
Multicore fibers and few-mode have potential application in realizing dense-space-division multiplexing systems. However, there are some tradeoff requirements for designing the fibers. In this paper, such as spatial channel count, crosstalk, differential mode delay, cladding diameter discussed. Further, design concept transmission characteristics of high-core-count single-mode multicore A heterogeneous fiber with 30 cores quasi-single-mode multi-core 31 developed.
A 30-core fiber with heterogeneous cores that achieved large spatial multiplicity and low crosstalk of less than −40 dB at 100 km was demonstrated. The correlation lengths were estimated to be more 1 m.
An analytical expression for the mode coupling coefficient in homogeneous trench-assisted multi-core fibers is derived, which has a simple relationship with one normal step-index structures.The amount of inter-core crosstalk reduction (in dB) structures compared to can then be written by expression.Comparison numerical simulations confirms that obtained very good accuracy estimation.The properties fibers, such as dependence on core pitch and wavelength-dependent crosstalk, this expression.
Simultaneous MIMO-free transmission of 12 orbital angular momentum (OAM) modes over a 1.2 km air-core fiber is demonstrated.WDM compatibility the system shown by using 60, 25 GHz spaced WDM channels with 10 GBaud QPSK signals.System performance evaluated measuring bit error rates, which are found to be below soft FEC limit, and limited inter-modal crosstalk.The crosstalk in analyzed, it concluded that can significantly reduced an improved multiplexer de-multiplexer.
Since about one and half centuries ago, at the dawn of modern communications, radio optics have been two separate electromagnetic spectrum regions to carry data. Differentiated by their generation/detection methods propagation properties, paths evolved almost independently until today. The optical technologies dominate long-distance high-speed terrestrial wireline communications through fiber-optic telecom systems, whereas mainly dominated short- medium-range wireless scenarios. Now, these...
More than 1000 optical frequency channels are generated with 12.5 GHz spacing from a single supercontinuum source. 600–700 for the wavelength range 1512–1580 nm confirmed to offer SNRs and Q factors sufficient multi-span 2.5 Gbit/s DWDM transmission.
A novel method for generating multiwavelength-channel picosecond optical pulses from a single laser source is proposed using supercontinuum in fibres combined with an all-fibre birefringent periodic filter. More than 100-wavelength-channel, 10 ps are generated simultaneously over 1.224–1.394 μm spectral range 1.9 nm spacing 7.6 Nd : YLF pulse source.
Dispersion design in a singlemode fibre is investigated experimentally and numerically for generating supercontinuum with flatly broadened spectrum. It found to be important both that group velocity dispersion convex function two zero-dispersion wavelengths also it decreases length. A calculated spectrum explains well obtained experimentally. The mechanism of the spectral evolution examined.
In this paper, ultradense wavelength-division multiplexing (WDM) transmission technologies are discussed, and a field demonstration of over-1000-channel WDM is reported. The generation an signal using supercontinuum multicarrier source that generates more than 1000 carriers uniform precise channel spacing 6.25 GHz presented. influence four-wave-mixing generated in the fiber requirements placed on multiplexer demultiplexer described. An experiment A 1046 /spl times/ 2.67-Gbit/s...
We demonstrate bidirectional transmission over 450 km of newly-developed dual-ring structured 12-core fiber with large effective area and low crosstalk. Inter-core crosstalk is suppressed by employing propagation-direction interleaving, 409-Tb/s capacities are achieved for both directions.
We demonstrate 12-core fiber bidirectional long-haul transmission with sub-petabit-class capacity (2 × 344 Tb/s). Inter-core crosstalk management and multicarrier nonlinear compensation enabled the longest distance of 1500 km in SDM unidirectional over 300 Tb/s.
We demonstrate the first 1-Pb/s unidirectional inline-amplified transmission over 205.6-km of single-mode 32-core fiber within C-band only. 96-Gbaud LDPC-coded PDM-16QAM channels with FEC redundancy 12.75% realize high-aggregate spectral efficiency 217.6 b/s/Hz.