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Higher-order modulation formats for spectral-efficient high-speed metro systems

: Freund, R.; Nölle, M.; Seimetz, M.; Hilt, J.; Fischer, J.; Ludwig, R.; Schubert, C.; Bach, H.-G.; Velthaus, K.-O.; Schell, M.


Weiershausen, W. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Optical metro networks and short-haul systems III : Optical Metro Networks and Short-Haul Systems III Conference; 25 - 27 January 2011, San Francisco, California, United States; part of SPIE photonics west
Bellingham, WA: SPIE, 2011 (Proceedings of SPIE 7959)
ISBN: 978-0-8194-8496-3
Paper 795902
Optical Metro Networks and Short-Haul Systems Conference <3, 2011, San Francisco/Calif.>
Photonics West Conference <2011, San Franciso/Calif.>
Fraunhofer HHI ()

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.