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Proceedings Paper

Temperature induced dispersion variation and equalization in 107Gb/s transmission systems
Author(s): Daniel Fritzsche; Dirk Breuer
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Paper Abstract

Ethernet is widely used in LAN and campus networks and its potential use for next generation transmission systems is further supported by ongoing standardization activities for 100Gb/s Ethernet over optical fiber. In telecom networks data rates of 40Gb/s per channel will be deployed during the next few years and discussions about the next option already started. To ensure compatibility and foster the transport of Ethernet data the upgrade to 100Gb/s optical transmission in telecom networks is under discussion. Several transmission techniques like advanced modulation formats (e.g. DQPSK), inverse Multiplexing, OFDM and equalization techniques are possible candidates. As high speed electronics become available pure 100Gb/s ETDM seems to be the most cost efficient solution, compared to polarization multiplex or multilevel modulation, but suffers from severe signal degradations due to chromatic dispersion and even dispersion slope. As these effects are also temperature varying the adaptive dispersion compensation is critical for 100Gb/s systems. The variations of first and second order dispersion for the SMF as well as the DCF modules have to be compensated exactly and therefore adaptive techniques are mandatory. In this paper we investigate the influence of dispersion changes due to temperature variations in 107Gbit/s transmission for different system configurations consisting of e.g. transmission fibers like SSMF and NZ-DSF and appropriate DCF modules by numerical simulations. The temperature and dispersion variations are changed randomly for different fiber spans to model a distributed telecom infrastructure of regional and metro networks. The potential of optical and electrical equalizers in these scenarios using cost-effective NRZ modulation is analyzed.

Paper Details

Date Published: 10 September 2007
PDF: 9 pages
Proc. SPIE 6774, Optical Transmission Systems and Equipment for Networking VI, 67740H (10 September 2007); doi: 10.1117/12.733976
Show Author Affiliations
Daniel Fritzsche, T-Systems Enterprise Services GmbH (Germany)
Dirk Breuer, T-Systems Enterprise Services GmbH (Germany)

Published in SPIE Proceedings Vol. 6774:
Optical Transmission Systems and Equipment for Networking VI
Werner Weiershausen; Benjamin B. Dingel; Achyut Kumar Dutta; Ken-ichi Sato, Editor(s)

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