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Proceedings Paper • Open Access

Higher-order modulation formats for spectral-efficient high-speed metro systems
Author(s): R. Freund; M. Nölle; M. Seimetz; J. Hilt; J. Fischer; R. Ludwig; C. Schubert; H.-G. Bach; K.-O. Velthaus; M. Schell

Paper Abstract

Worldwide, higher-order modulation formats are intensively investigated to further increase the spectral efficiency for building the next generation of high-speed metro systems. IQ-modulators, coherent receivers and electronic equalizers are hereby discussed as key devices. We report on system design issues as well as on HHI's latest achievements in developing InP based high-speed modulators and coherent receiver frontends.

Paper Details

Date Published: 25 January 2011
PDF: 8 pages
Proc. SPIE 7959, Optical Metro Networks and Short-Haul Systems III, 795902 (25 January 2011); doi: 10.1117/12.881243
Show Author Affiliations
R. Freund, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
M. Nölle, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
M. Seimetz, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
J. Hilt, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
J. Fischer, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
R. Ludwig, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
C. Schubert, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
H.-G. Bach, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
K.-O. Velthaus, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)
M. Schell, Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (Germany)


Published in SPIE Proceedings Vol. 7959:
Optical Metro Networks and Short-Haul Systems III
Werner Weiershausen; Benjamin Dingel; Achyut Kumar Dutta; Atul K. Srivastava, Editor(s)

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