Showing papers by "Norbert Hanik published in 2001"
17 Mar 2001
TL;DR: In this article, the first penalties due to XPM crosstalk have been measured by switching neighbouring channels in a long distance 16/spl times/10 Gb/s ASK NRZ system based on standard single mode fiber (SMF) links with dispersion optimized transmission sections.
Abstract: For the first time penalties due to XPM crosstalk have been measured by switching neighbouring channels in a long distance 16/spl times/10 Gb/s ASK NRZ system based on standard single mode fibre (SMF) links with dispersion optimized transmission sections.
7 citations
17 Oct 2001
TL;DR: A simplified network design approach based on normalized optical transmission sections where the physical links are built from a cascade of identical basic blocks using the concept of normalized sections is proposed.
Abstract: Design, control and management of all-optical transparent islands based on fibers, optical amplifiers and transparent Optical Cross Connects (OXC) have to deal with a vast number of issues such as network topology, routing, protection, and restoration schemes. However, since in such a transparent network light-paths generally have to transit through several fiber sections, amplifiers, and OXCs, all of which add noise and degrade the signal performance, optical layer network protocols have to be aware of the end-to-end signal quality for each specific light-path. This information should be obtained without burdening these protocols with details of the physical layer. In this paper we propose a simplified network design approach based on normalized optical transmission sections where the physical links are built from a cascade of identical basic blocks. For an upper layer protocol only the number of traversed blocks has to be monitored for estimating signal quality. Using numerical simulations the maximum number of cascaded building blocks for 10 Gbit/s RZ modulation format for different basic building block-configurations is investigated and compared with the performance of NRZ based systems under similar conditions. It is shown that robust transparent islands of about 1600 km maximum link length without 3R regeneration are feasible for both modulation formats using the concept of normalized sections.
2 citations
TL;DR: In this paper, the authors provide a simplified design approach to utilize the optical transparency in WDM-based optical networks, and a set of simplified parameters and rules describing the transparent sub-networks is presented.
Abstract: Summary Transparent optical networks will play an important role in the near future. The aim of this work is to provide a simplified design approach how to utilize the new feature “optical transparency” in WDM based optical networks. Therefore optical nodes and transmission links are characterized and a set of simplified parameters and rules describing the transparent sub-networks is presented. In this way the complexity originating from physical constraints is reduced substantially, simplifying the management of these optical networks and the physical parameters which will be implemented in the routing protocols. This contribution is a compendium of results of the BMBF KomNet project in the field of optical networks optimisation.