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A modular photonic interconnection network based on a combination of basic 2x2 all-optical nodes is presented. The proposed architecture is synchronous, can operate up to 160Gb/s and exhibits self-routing capability and very low switching latency. 1. Introduction In the field of high-performance computing systems, current electronic interconnection networks(More)
Super-channel (or multi-carrier) transmission is today one of the most promising techniques for the support of high line rates, which are required to satisfy the massive increase of Internet traffic. Moreover, flex-grid optical networks seem to be the candidates for backbone networks by enabling high spectral efficiency thanks to the adoption of the ITUT(More)
Control and data plane innovations are driving the evolution of flexible grid optical networks enabling more granular reservation of spectrum portion. On the one hand, the path computation element (PCE) is evolving toward the stateful architecture to effectively perform reoptimization on existing LSPs. On the other hand, superchannels are emerging as an(More)
An advanced PCE architecture, exploiting novel PCEP extensions for flexible-grid optical networks, is proposed and experimentally validated with dynamic frequency slot assignment and format adaptation from DP-16QAM to DP-QPSK at 100Gb/s. 1. Introduction Emerging flexible wavelength switched optical networks (WSONs) are expected to provide significant(More)
An experimental demonstration of active stateful PCE for flexgrid networks is presented. The PCE enables elastic operations on established connections and, when required, performs hitless defragmentation of spectrum resources. Experimental assessment, including shifting of 400Gbps four sub-carrier superchannel is shown.
Emerging services, such as high-definition Internet Protocol TV (IP-TV) or data center migration, are going to increase the amount of multicast traffic in the Internet. The support of multicast directly in the optical domain, instead of at the IP layer, is a target for reducing the amount of optical-electronic-optical conversions (thus, the network(More)
In flexigrid elastic optical networks, filtering cascade effects strongly affect the overall transmission performance. To avoid these detrimental impairments, each lightpath is typically configured, in an independent way, to encompass additional spectrum resources. Thus, the flat central region of the traversed filters are exploited and their transition(More)
This paper aims to review the status of standardization activities on the black link (BL) and corresponding alien wavelength concepts. It discusses experimental work on filterless optical networks conducted within a dedicated Deutsche Telekom project. The general prospects and existing challenges concerning elastic extensions of the BL are also assessed.(More)
Enhanced-SSFM digital backpropagation (DBP) is experimentally demonstrated and compared to conventional DBP. A 112 Gb/s PM-QPSK signal is transmitted over a 3200km dispersion-unmanaged link. The intradyne coherent receiver includes single-step digital backpropagation based on the enhanced- SSFM algorithm. In comparison, conventional DBP requires twenty(More)
The path computation element (PCE) architecture was originally proposed with a stateless condition, i.e., considering only network reserved resources during constraint-based path computations. More recently, a stateful architecture was introduced to additionally maintain the state of computed and established label switch paths (LSPs). Furthermore, the PCE(More)