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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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Proceedings ArticleDOI
Coherent reception and 126 GHz bandwidth digital signal processing of CO-OFDM superchannel generated by fiber frequency conversion
Takahito Tanimura,Tomoyuki Kato,Ryo Okabe,Shoichiro Oda,Thomas Richter,Robert Elschner,Carsten Schmidt-Langhorst,Colja Schubert,Jens C. Rasmussen,Shigeki Watanabe +9 more
TL;DR: This work implements 126-GHz bandwidth coherent receiver and demonstrates multi-channel reception with nonlinear compensation (NLC) of a precisely frequency-allocated four-channel 28-GBd-QPSK OFDM superchannel sequentially aggregated using fiber-optic signal processing.
Journal ArticleDOI
160-Gb/s polarization insensitive all-optical demultiplexing using a gain-transparent ultrafast nonlinear interferometer (GT-UNI)
TL;DR: In this paper, a polarization-insensitive all-optical demultiplexer based on gain-transparent operation of a semiconductor optical amplifier in an ultrafast nonlinear interferometer (GT-UNI) using polarization diversity is demonstrated.
Journal ArticleDOI
PPLN-Waveguide Based Tunable Wavelength Conversion of QAM Data Within the C-Band
TL;DR: In this article, a tunable optical wavelength conversion of a 40 Gb/s 16-ary quadrature amplitude modulated signal within the C-band was demonstrated by cascaded sum frequency generation and difference frequency generation in a periodically-poled lithium niobate module.
Proceedings ArticleDOI
Design and performance evaluation of an OPC device using a dual-pump polarization-independent FOPA
Isaac Sackey,Francesco Da Ros,Thomas Richter,Robert Elschner,Mahmoud Jazayerifar,Christian Meuer,Christophe Peucheret,Klaus Petermann,Colja Schubert +8 more
TL;DR: In this paper, the performance of a polarization independent fiber-based optical parametric amplifier is investigated in terms of amplification and wavelength conversion for optical phase conjugation applications using 5×28-GBd PDM 16-QAM signals.
Proceedings ArticleDOI
Experimental investigation of a four-dimensional 256-ary lattice-based modulation format
Tobias A. Eriksson,Saleem Alreesh,Carsten Schmidt-Langhorst,Felix Frey,Pablo Wilke Berenguer,Colja Schubert,Johannes Karl Fischer,Peter A. Andrekson,Magnus Karlsson,Erik Agrell +9 more
TL;DR: A four-dimensional modulation format with 256 point from the D4-lattice (256-D) is compared to PM-16QAM in experiments and it is found that 256-D is more sensitive at high OSNR but with a 21.3% overhead turbo product code, PM- 16QAM outperforms 256- D.