Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

160 Gbit/s transmission with long-term stability


Schäffer, C. ; Informationstechnische Gesellschaft -ITG-, Fachausschuß 5.3 Optische Nachrichtentechnik:
Photonische Netze. Vorträge der 6. ITG-Fachtagung 2005 : 2. bis 3. Mai 2005 in Leipzig
Berlin: VDE Verlag, 2005 (ITG-Fachbericht 186)
ISBN: 3-8007-2892-3
Fachtagung Photonische Netze <6, 2005, Leipzig>
Fraunhofer HHI ()

We describe a transmission system having a data rate of 160 Gbit/s, based on the RZ-DPSK modulation format. The 160 Gbit/s single-polarization signal is generated by optical time division multiplexing technology using the base rate of 40 Gbit/s. The setup is explained and results are given with a special focus on the stability issue of the transmission system. The pulse source, the optical gate for demultiplexing, the clock recovery and the balanced photo-detector are based on semiconductor components. We present long-term bit error measurements (10 hours) over two different long-haul fiber links. The first link comprises 3x106 km standard single mode fiber and uses a PMD mitigation scheme. The other link consists of 4 dispersion managed 80 km fiber spans without the need for an additional PMD compensation. Using EDFA amplification solely and also no FEC, error-free operation was achieved over several hours, only limited by slow drift effects in the laboratory system.