Optical access networks

Optical access networks are getting increasingly close to the end user, only the last 100 meters are bridged via copper or radio meanwhile. Future 5G networks will be convergent, i.e. serve both, fixed and mobile users with a common infrastructure. This approach implies new challenges for the optical access. The group currently develops passive optical networks (100 Gbit/s OFDM-PON) as well as radio over fiber links (RoF for  10 Gbit/s). The mission is to advance optical access technology  for future telecommunications.

Our research topics include the following areas:

  • Concepts for convergent optical access networks
  • Optical fiber transmission with IM/DD up to 100 km
  • Radio-over-fiber (RoF) technology
  • Modern physical layer techniques (OFDM, PolMux)
  • Modern multiple access techniques (OFDMA)
  • Real-time signal processing up to 20 GHz bandwidth
  • Lab- and field tests in real use cases

FTTx Network Planning

The central goal of the project is to support the strategic decision process of city carriers and new local operators by performing an objective analysis that considers the varying, but always case-dependent boundary conditions.

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100G Access and Beyond

As a general guideline for the long-term goal in next-generation passive optical access networks (PONs), one aims in connecting up to 1000 end-users with 1 Gbit/s symmetric data rate over 50 km optical fibre (even 100 km for protection path).

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