25 January 2011 Higher-order modulation formats for spectral-efficient high-speed metro systems
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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.
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R. Freund, M. Nölle, M. Seimetz, J. Hilt, J. Fischer, R. Ludwig, C. Schubert, H.-G. Bach, K.-O. Velthaus, M. Schell, "Higher-order modulation formats for spectral-efficient high-speed metro systems", Proc. SPIE 7959, Optical Metro Networks and Short-Haul Systems III, 795902 (25 January 2011); doi: 10.1117/12.881243; https://doi.org/10.1117/12.881243

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