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Proceedings Paper

Ultrafast technologies in 160 Gbit/s transmission systems
Author(s): Carsten M. Schmidt-Langhorst; Colja Schubert; Christof Boerner; Sebastian Ferber; Reinhold Ludwig; Joern Berger; Enno Hilliger; Vincent Marembert; Marcel Kroh; Hans-Juergen Ehrke; Hans-Georg Weber
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Paper Abstract

Today, commercial fiber optical transmission systems are operated at a data rate of 10 or 40 Gbit/s per wavelength channel. The optical time division multiplexing (OTDM) technique allows for the investigation of the next generation TDM data rate of 160 Gbit/s while electrical signal processing at 160 Gbit/s is not yet available. In an OTDM transmission system, the key functions of the transmission system are realized using ultrafast all-optical or electro-optical network elements. In this paper, the recent progress in ultrafast technologies for 160 Gbit/s OTDM transmission systems is reviewed. The focus will be on techniques to realize optical pulse sources and ultrafast optical gates which operate on a time scale of a few picoseconds to a few hundred femtoseconds. They are the key elements of a 160 Gbit/s OTDM transmission system and are applied for various functions in the system. The paper focuses in particular on the application of ultrafast optical technologies for measurement purposes. In an optical communication system the quality of the data signal can be inferred from the optical eye diagram of the data signal. Presently, the measurement of optical eye diagrams at a data rate of 160 Gbit/s is inhibited by the limited bandwidth of photodetectors and electrical sampling oscilloscopes. By realizing an all-optical sampling system using the ultrafast technologies discussed before, the bandwidth of such an optical sampling system exceeds 400 GHz and allows for eye diagram measurements up to 320 Gbit/s.

Paper Details

Date Published: 25 October 2004
PDF: 11 pages
Proc. SPIE 5595, Active and Passive Optical Components for WDM Communications IV, (25 October 2004); doi: 10.1117/12.571871
Show Author Affiliations
Carsten M. Schmidt-Langhorst, Fraunhofer-Institute for Telecommunications (Germany)
Colja Schubert, Fraunhofer-Institute for Telecommunications (Germany)
Christof Boerner, Fraunhofer-Institute for Telecommunications (Germany)
Sebastian Ferber, Fraunhofer-Institute for Telecommunications (Germany)
Reinhold Ludwig, Fraunhofer-Institute for Telecommunications (Germany)
Joern Berger, Fraunhofer-Institute for Telecommunications (Germany)
Enno Hilliger, Fraunhofer-Institute for Telecommunications (Germany)
Vincent Marembert, Fraunhofer-Institute for Telecommunications (Germany)
Marcel Kroh, Fraunhofer-Institute for Telecommunications (Germany)
Hans-Juergen Ehrke, Fraunhofer-Institute for Telecommunications (Germany)
Hans-Georg Weber, Fraunhofer-Institute for Telecommunications (Germany)


Published in SPIE Proceedings Vol. 5595:
Active and Passive Optical Components for WDM Communications IV
Achyut Kumar Dutta; Abdul Ahad Sami Awwal; Niloy K. Dutta; Yasutake Ohishi, Editor(s)

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