Contract Research


  • Development of wireless system for airplane cabin communication
  • Based on visible light communication (VLC)
  • Reuse of existing cabin illumination infrastructure

Dominic Schulz

DESI – Energy Efficient ICT Production

  • Creating ICT component connectability in smart grids
  • Integrating ICT components into the entire energy supply chain
  • Control of variable energy supply for ICT networks

Corporate Responsibility Report Telekom 2010/2011

Dipl.-Inf. Michael Schlosser

Upgrades of Submarine Systems

  • Design of commercial 20/40 Gbit/s DPSK transponders for upgrading of installed submarine systems
  • Challenge: 100 Gbit/s transatlantic reach for upgrades

Publication: Upgrades of Submarine Systems using Higher Bitrates and Advanced Modulation Formats (2006)
Press Release: Submarine fiber optic cable system to connect Guam, Okinawa, Kyushu and Incheon (August 2011)

Dipl.-Ing. Lutz Molle
Dr. rer. nat. Colja Schubert

Wavelength Division Multiplexing Passive Optical Networking (WDM-PON)

  • 1 Gbit/s unshared, symmetrical
  • Up to 100 km reach
  • Up to 1000 customers per system
  • Support of mobile backhauling

Dipl.-Ing. Christoph Kottke

Satellite Communication @ 1550 nm

  • In comparison to 850 nm and 1064 nm,
    1550 nm leads to
    - Weaker turbulence effects
    - Less clear-sky attenuation
    - Better eye-safety conditions
  • Target: Design of reliable high capacity feeder links

Publication: Hochbitratige optische Übertragung für die Satellitenkommunikation (2009)

Dr.-Ing. Carl-Michael Weinert
Dr.-Ing. Ronald Freund

Differential Quaternary Phase Shift Keying (DQPSK)

  • 1.28 Tb/s over 240 km and
    2.56 Tb/s over 160 km DQPSK transmission alternating polarization

Publication: Single channel 1.28 Tbit/s and 2.56 Tbit/s DQPSK transmission (2005)

Dr. rer. nat. Carsten Schmidt-Langhorst
Thomas Richter, M.Sc.
Dr. rer. nat. Colja Schubert