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Highly linear photo receiver module for 400Gb/s fiber-optic communication


The Objective


The data rate of fiber-optic communication links has been continuously growing in the past decade to cope with the growth in the internet traffic. It is expected that in the course of the next four years the data rate will increase by a factor of four, that is, to 400Gb/s. Simple on/off keying modulation, which was the standard modulation for 10Gb/s links, is no longer viable. To reach a data rate of 400Gb/s, long-haul fiber-optic transceivers will mostly use higher-order modulation schemes like DP-QPSK (dual-polarization quadrature phase shift keying). The project aims to develop a fully packaged photo receiver module for future optical communication systems. A new set of photonic components (photodiodes and 90 hybrids) as well as highly linear transimpedance amplifiers (TIAs) will be developed within the frame of the project.


IHP’s Contribution


IHP is developing the highly linear transimpedance amplifiers (TIAs) using the advanced IHP 0.25µm and 0.13µm SiGe BiCMOS technologies. The main design challenge is to provide TIAs with minimum total harmonic distortion and high bandwidth.




This research is funded by the federal ministry of education and research (Bundesministerium für Bildung und Forschung, BMBF).


Project Partners


U2t photonics AG, Berlin, Germany

Fraunhofer Heinrich Hertz Institute (HHI), Berlin, Germany


The building and the infrastructure of the IHP were funded by the European Regional Development Fund of the European Union, funds of the Federal Government and also funds of the Federal State of Brandenburg.