C
Colja Schubert
Researcher at Heinrich Hertz Institute
Publications - 233
Citations - 3661
Colja Schubert is an academic researcher from Heinrich Hertz Institute. The author has contributed to research in topics: Wavelength-division multiplexing & Optical amplifier. The author has an hindex of 28, co-authored 214 publications receiving 3274 citations. Previous affiliations of Colja Schubert include Fraunhofer Society.
Papers
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Journal ArticleDOI
Comparison of interferometric all-optical switches for demultiplexing applications in high-speed OTDM systems
Colja Schubert,J. Berger,Stefan Diez,H.J. Ehrke,Reinhold Ludwig,U. Feiste,Christian Schmidt,H.G. Weber,G. Toptchiyski,Sebastian Randel,Klaus Petermann +10 more
TL;DR: In this paper, three interferometric all-optical switches based on cross-phase modulation (XPM) in SOAs, the semiconductor laser amplifier in a loop mirror (SLALOM) switch, and the ultrafast nonlinear interferometer (UNI) switch are compared and their application is discussed as demultiplexer in optical time division multiplexing (OTDM) systems for data rates of 40, 80, and 160 Gb/s.
Journal ArticleDOI
Bandwidth-Variable Transceivers based on Four-Dimensional Modulation Formats
Johannes Karl Fischer,Saleem Alreesh,Robert Elschner,Felix Frey,Markus Nolle,Carsten Schmidt-Langhorst,Colja Schubert +6 more
TL;DR: It is argued that four-dimensional modulation formats present an attractive complement to conventional polarization-multiplexed formats in the context of bandwidth-variable transceivers, where they enable a smooth transition with respect to spectral efficiency while requiring marginal additional hardware effort.
Journal ArticleDOI
Highly efficient CW parametric conversion at 1550 nm in SOI waveguides by reverse biased p-i-n junction.
Andrzej Gajda,Lars Zimmermann,Mahmoud Jazayerifar,Georg Winzer,Hui Tian,Robert Elschner,Thomas Richter,Colja Schubert,Bernd Tillack,Klaus Petermann +9 more
TL;DR: The observed peak conversion efficiency is the highest CW efficiency in SOI reported so far, and four-wave mixing based parametric conversion experiments in p-i-n diode assisted silicon-on-insulator (SOI) nano-rib waveguides using continuous-wave (CW) light around 1550 nm wavelength are presented.
Proceedings ArticleDOI
Single channel 1.28 Tbit/s and 2.56 Tbit/s DQPSK transmission
H.G. Weber,S. Ferber,M. Kroh,Carsten Schmidt-Langhorst,Reinhold Ludwig,V. Marembert,C. Boerner,Fumio Futami,Shigeki Watanabe,Colja Schubert +9 more
TL;DR: By combining the techniques of optical TDM with polarization multiplexing and DQPSK modulation, this paper achieved 240 km transmission of 1.28 Tbit/s and 160 km transmission with 2.56 T bit/s in a single wavelength channel.
Journal ArticleDOI
160-Gb/s all-optical demultiplexing using a gain-transparent ultrafast-nonlinear interferometer (GT-UNI)
Colja Schubert,Stefan Diez,J. Berger,Reinhold Ludwig,U. Feiste,H.G. Weber,G. Toptchiyski,Klaus Petermann,V. Krajinovic +8 more
TL;DR: In this paper, an all-optical demultiplexer based on gain-transparent operation of a semiconductor optical amplifier (SOA) in an ultrafast-nonlinear interferometer (GT-UNI) is presented.