Olivier Courtois

Performance comparison of 40G and 100G coherent PDM-QPSK for upgrading dispersion managed legacy systems

We compare the performance of 40 G and 100 G coherent PDM-QPSK solutions for the upgrade of existing 10 G-based optical networks. This comparison is performed on the Alcatel-Lucent 1626LM commercial system.

Architectures and management of submarine networks

Abstract The market has evolved and continues to evolve with the massive use of internet. Everybody is using connected objects with new services and applications with direct connection to network. This requires a new vision that integrates both terrestrial and submarine networking with new combined features. Network purchasers are now demanding a greater degree of network flexibility and the ability to carry new services from POP to POP (point of presence). In any undersea cable systems (domestic, regional or interregional), ROADM-BU can provide network flexibility features such as bandwidth adaptation, resilience to cable faults, optical bypass switching, traffic confidentiality. Network connectivity is enlarged beyond submarine cable stations up to terrestrial network POP and even with multi-POP to optimize terrestrial and submarine resources usage thanks to recoloring node. The network management system (NMS) guides any end-user at each step of system life: day-to-day operation & maintenance (O&M) including end to end traffic management, event-driven actions, and system upgrades. Data correlation allows providing powerful system functions to analyze optical & electrical degradation and faults, and even automatic repair. Network programmability and global resource management are more and more flexible thanks to software defined network (SDN).