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Microring resonators, one of the key components in nanophotonic networks-on-chip (NoCs), are highly sensitive to process and temperature variations. The consequential resonant wavelength deviations negatively impact reliable on-chip communication. To revert resonant wavelengths to their desired values and recover bandwidth, power trimming is usually applied; unfortunately, this technique incurs considerable...
Free space optic (FSO) is a wireless technology that promises high speed data rate with low deployment cost. Next generation wireless networks require more bandwidth which is not supported by todays wireless techniques. FSO can be a potential candidate for last mile bottle neck in wireless network and for many other applications. In this paper, we experimentally demonstrate a high speed FSO system...
The problem of ensuring virtual network (VN) connectivity in presence of multiple link failures in the substrate network (SN) is not well investigated in Network Virtualization (NV) literature. We name this problem as Connectivity-aware Virtual Network Embedding (CoViNE). Solving CoViNE will enable a VN operator to perform failure recovery without depending on the SN provider, similar to the IP restoration...
Passive Optical Network (PON) is an optical based network architecture, which can offers higher data rates than the conventional copper based access networks. On the other hand, it is often observed that bandwidth requirements increasing rapidly day by day. To beat this issue, it is needed to increases the bandwidth of PON by deploying the Wavelength Division Multiplexing (WDM) so that, multiple wavelength...
Long-Reach Ethernet Passive Optical Networks (LR-EPONs) have become a promising broadband access technology due to cost-effectiveness and the ability to simplify Metropolitan Area Network (MAN) and Local Area Network (LAN) architectures. However, the increased propagation delay has led increased idle time for interleaved-based Dynamic Bandwidth Allocation schemes resulting in poor bandwidth utilization...
We demonstrate the direct generation of broadband wavelength-multiplexed polarization entangled photons from a single monolithic chip. The obtained concurrence of 0.98±0.01, and bandwidth of 95 nm are the highest values reported in any waveguide source, setting new limits for monolithic quantum technologies.
Disasters hit telecommunication structures every year. As Earth becomes more disaster-prone, telecom networks, and especially optical networks due to their high capacity, should be designed to prepare against disasters. Although disaster resiliency for optical core networks has been subject of significant recent research, damages on the network infrastructure due to the direct or indirect impacts...
We demonstrate a continuous range of complementary (+/−) weights in a bank of silicon microrings. Continuously configurable weighted addition is a key function for multivariate analog signal processing and could enable scalable analog networking approaches in silicon photonics.
This paper presents the application of QoS about a heterogeneous network based on DWDM transmission technique as core and having as edges two technology platforms, ATM and Ethernet applied QoS in residential services such as VoIP, video conferencing, digital television and data link high rates of transmission. With this design and implementation performance were performed measurements to services...
We investigated the reach increase obtained through non-linearity mitigation by means of transmission symbol rate optimization (SRO). First, we did this theoretically and simulatively. We found that for PM-QPSK systems at full-C-band the reach increase may be substantial, on the order of 10%–25%, with optimum symbol rates on the order of 2-to-6 GBaud. We extended the investigation to PM-16QAM, where...
We show that nonlinear interference noise (NLIN) produced by faraway WDM channels is dominated by nonlinear phase-noise and polarization-rotations, whereas NLIN produced by nearest channels tends to be more circular. We discuss the impact of these results on nonlinear mitigation.
We investigate the reach-increase obtained by optimizing the transmission symbol rate. We show that for PM-QPSK systems at full-C-band the increase may be larger than obtained through ideal single-channel backward-propagation, and similar for PM-16QAM.
We demonstrate an 8 by 14 Gbps compatible WDM link based on a single-section semiconductor mode-locked laser, silicon photonics resonant ring modulators and joint channel reamplification with a semiconductor optical amplifier operated in the linear regime. Individual channels reach a data rate of 25 Gbps with signal quality-factors above 7.
We demonstrate real-time and fair throughput control among ONUs as realized by our dynamic-load-balancing method. Experiments on the proposal show that it achieves uniform throughput for ONUs that download 3-sec blocks of heavy traffic through OSUs with different bias levels.
We report on the experimental comparison of the non linear tolerance of multicarrier and single-carrier modulations in WDM scenarios while varying the bandwidth efficiency. Non linear tolerance improvement of multicarrier approach decreases with bandwidth efficiency.
Optical sub-wavelength switched networks have been attracting attention as a cost-effective solution, especially for bursty metro-area networks. Although such networks fully use wavelength capacity and provide bandwidth flexibility, a stable and/or robust control plane is necessary for dynamic control scenarios. Moreover, the required resources for the control channel are considerable when we aim...
In an effort to create a full-color holovideo display, a wavelength-multiplexing LiNbO3 crystal is designed. Fabrication parameters are presented. Results of tests and measurements are presented, as well as the procedures used to obtain them. By matching the bandwidth of the LiNbO3 to that of current GPUs, the display is able to efficiently process large amounts of data.
We investigate the dependence of maximum system reach on symbol rate. We identify a suitable modeling framework and derive a closed-form formula for the optimum rate, typically 2-to-10 GBaud. Maximum reach gains are between 5% and 20%.
We demonstrate a single-fiber low-cost 1.25 Gb/s transceiver able to switch between transmission and reception mode. Crosstalk suppression with <1dB penalty is achieved through filtered reception mode for WDM-loaded power-splitting PONs with >20dB optical budget.
We address the future access service and system requirements in Japan. We must ensure that sufficient bandwidth is available for future mobile and IP-TV services. We propose an optical access platform to meet these different requirements.
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