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A broadband silicon PSR is presented with an insertion loss lower than ∼0.7dB/0.3dB and crosstalk lower than 12.1dB/14.7dB for TE and TM mode respectively. By combining the PSR with AWG and Germanium PDs, an integrated polarization insensitive DWDM receiver is further demonstrated.
We evaluate contiguous, discrete and hybrid slot assignment methods under both quasi-static and dynamic traffic conditions. We show the tradeoff among these methods in terms of network performance and system complexity.
We present a new concept “utilization entropy” which represents the level of resource fragmentation in optical networks. The utilization entropies of a link, a path and a network serve as useful indicators for network optimization.
We propose a multi-layer restoration scheme that strategically selects a subset of IP links to be restored at the optical layer with the rest being restored at the IP layer, resulting in significant cost savings.
We show that the ideal spectrum granularity in dynamic flexible grid networks to achieve best blocking performance is determined by the greatest common factor of spectrum widths of all mixed-rate signals.
In this paper, we address the problem of survivable traffic grooming in optical WDM networks in which lightpaths are hop constrained. Survivability is provisioned at the wavelength granularity through either dedicated or shared path protection schemes. We propose an auxiliary-graph-based algorithm that addresses grooming, protection, and impairment constraints in a combined manner and that determines...
We present a heuristic algorithm to address the demand aggregation problem in DWDM optical networks employing shared ring protection. The algorithm decides the route and wavelength of each demand with the aim of minimizing the total number of optical line cards as well as reducing the total number of DWDM rings.
We consider traffic grooming and regenerator placement in an optical network in which lightpaths are hop-constrained by impairments. Combining grooming with regenerator placement reduces costs compared to addressing traffic grooming and regenerator placement separately.
In this paper, we address the problem of traffic grooming and regenerator placement in a WDM optical network in which lightpaths are hop-constrained by physical impairments. The efficient placement of regenerators and electronic grooming equipment at ROADM nodes for a given network topology is required such that all traffic demands can be supported with minimum cost. We present a detailed ROADM node...
A weight-based heuristic algorithm was developed to efficiently aggregate UPSR demands into SONET rings over DWDM networks in order to minimize the total number of optical line cards for a given set of demands.
Advance reservation is a mechanism to guarantee the availability of resources when they are needed. In the context of LambdaGrid, this mechanism is used to provide data-intensive applications with the needed deterministic network quality of service to transport data between grid instruments, high-performance storage systems, compute clusters and visualization systems. Flexible scheduling affords users...
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