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Ultrafast Switching for High-Speed OTDM Networking

Obiettivo

Optical time-division multiplex (OTDM) is a promising candidate for future optical networks to overcome present node capacity limitations, provided that existing long-haul links can be scaled up in bit rate and that network flexibility is ensured. The FASHION project is investigating OTDM point-to-point transmission and for the first time time-domain routing for all-optical networks at single-channel data rates of 160Gb/s and higher.
Design rules are developed for maximised transmission reach and channel count at 160-Gb/s line rate, allowing the development of network concepts for mixed wavelength-division multiplexing (WDM) and 160-Gb/s OTDM. Experimentally, state-of-the-art 160-Gb/s transmission reach is extended to 500-1000km. Networking at 160Gb/s is demonstrated by developing a compact and reliable OTDM add and drop multiplexer (ADM). The developed technology will be evaluated both in the laboratory as in a field trial.

Objectives:
The general objective of the FASHION project is to assess the techno-economical potential of optical time-domain multiplexing (OTDM) in high-speed flexible optical networks. OTDM point-to-point transmission and time-domain routing will be investigated for single-channel data rates of 160Gb/s and higher.
The transmission reach is planned to be extended to 500-1000km allowing wide all-optical networks. Supported by the analysis of physical system limitations, network concepts including economical considerations will be developed for mixed wavelength-division multiplexed (WDM) and OTDM multi-terabit systems. Time-domain add-drop multiplexers will be developed including an assessment of their impact on the transmission performance. System operation and capabilities will be evaluated in both laboratory and field experiments. For realistic networking applications, particular emphasis will be put on compact and reliable modules by exploiting and enforcing advances in component technology.

Work description:
Optical time-domain multiplexed (OTDM) point-to-point transmission and time-domain routing will be investigated for single-channel data rates at 160Gb/s and higher. Supported by analytical theory and numerical simulations, physical transmission limits will be explored and transmission reach and channel count will be maximised. Network concepts will be developed for mixed wavelength-division multiplexed (WDM) and OTDM multi-terabit systems. In particular, architectural, techno-economical and reliability, issues will be addressed. The conceptual part of the project also covers the development of node synchronisation schemes for OTDM networking.
Experimentally, point-to-point transmission reach is planned to be extended to 500-1000 km by following the design rules developed in the theoretical part of the project. Different tuneable dispersion compensation solutions will be compared and applied in the transmission experiments if necessary. Various clock recovery techniques will be studied aiming for a 40-GHz clock to be extracted from a 160-Gb/s signal.
Advances in semiconductor optical amplifier (SOA) based all-optical switching technology will be exploited in order to demonstrate a compact and reliable OTDM add and drop multiplexer (ADM) module operating at 40-Gb/s and 10-Gb/s granularity. Its potential for use at even higher data rates will be explored. The ADM is considered as a key element for future OTDM core networks allowing for enhanced network flexibility. Its performance will be evaluated first in back-to-back experiments and then in various transmission configurations. The effect of cascading ADMs will also be investigated.
Finally, the assessment of OTDM technologies in optical networks will be concluded with a field trial and will result in design criteria and specifications for component and module designers, system suppliers and network operators.

Milestones:
- Design rules and architectures for cost-effective and highly-performing multi-terabit core networks operating at a 160-Gb/s line rate;
- High-speed optical clock recovery extracting a 40-GHz clock from a 160-Gb/s signal;
- Long-haul (500-1000km), single-channel 160-Gb/s transmission;
- Laboratory demonstration and performance evaluation of a time-domain all-optical add and drop multiplexer;
- OTDM networking demonstration;
- Assessment of the developed OTDM system technology in a field trial.

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Coordinatore

SIEMENS AKTIENGESELLSCHAFT
Contributo UE
Nessun dato
Indirizzo
WITTELSBACHERPLATZ 2
80333 MUENCHEN
Germania

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