CORDIS Archive

Objectives of experiments

	AC049 SPEED Superhighway by Photonically and Electronically Enhanced Digital transmission
	Organisations Hosting Experiments Contact Photonics Domain Broadening of Awareness Chains

The main objective of the field experiments in this project is to demonstrate the feasibility of very high bitrate optical transmission systems in the transit network, using the electrical time division multiplexing (ETDM) approach and re-using existing fibre infrastructure.

46.2 km installed standard singlemode fibre loop between Stuttgart and Ludwigsburg in Germany

Description of experiments / platforms

First feasibility field experiments at 20 Gbit/s and 40 Gbit/s over a 46.2 km installed standard singlemode fibre loop between Stuttgart and Ludwigsburg in Germany have been carried out using the new method of four-level Dispersion Supported Transmission (DST). The 46.2 km installed standard singlemode fibre loop is rented from Deutsche Telekom. Experiments are continuing in 1997. Results already achieved include:

• A 20 Gbit/s 4-level DST field experiment has been carried out successfully (BER <10-9).
• A 40 Gbit/s 4-level DST feasibility field experiment yields open eye-diagram.

These experiments are carried out on the 1.5 µm wavelength range. It should be noted that these results have been achieved without optical dispersion compensation devices. A second field experiment using the fibre infrastructure in the Lisbon area of the project partner CPRM in Portugal (national host) is planned for 1998 (probably in June, 1998). This will comprise a field experiment on standard singlemode fibre with STM-1 interfaces to application signals. The fibre infrastructure in the Lisbon area of the project partner CPRM in Portugal (national host) can be used for this experiment.

Applications used for experiments

Not specified; primarily a technology trial for high-speed bit transport.

Target groups

Network operators
Equipment manufacturers

Dates & duration

First field experiments (Germany): 1996 and 1997
Final field experiments (Portugal): June, 1998

Access arrangements

No accessibility to persons outside the project is planned.

Related trials & experiments

No other field experiments using 20 Gbit/s ETDM are known.

Contact

Dr. Berthold Wedding
Dept. ZFZ/NO
Alcatel SEL AG
Lorenzstrasse 10
D-70435 Stuttgart
Germany

Tel: +49 711 821 32263
Fax: +49 711 821 32457

E-mail: bwedding@rcs.sel.de

Organisations hosting experiments

Alcatel SEL AG, Stuttgart (D)
Companhia Portuguesa Radio Marconi, Lisbon (P)
Deutsche Telekom, Stuttgart (D)