Network elements WDM optical networks

  • Buxens Azcoaga, Alvaro Juan, (Project Manager)
  • Yu, Jianjun, (Project Participant)
  • Clausen, Anders (Project Participant)
  • Poulsen, Henrik Nørskov, (Project Participant)
  • Peucheret, Christophe, (Project Participant)


The purpose of this research project is to investigate the integration of components and subsystems as network elements in future all optical WDM networks and propose novel methods that can increase the functionality of the components.
Space switches are necessary components that allow routing of optical signals in a network without the need of transformation into the electrical domain. Semiconductor Optical Amplifiers, SOAs, are promising candidates as space switches. Exploiting the symmetry of telecommunication networks we have investigated the use of bi-directional switching, which allows to halve the number of switching elements needed in a network. Basic characterization of an SOA as a bi-directional switch has been performed at 10 Gbit/s followed by multi-wavelength and transmission experiments.
In the STVF cooperation project “L-band lasers, amplifiers and system-experiments” together with Lucent Technologies Denmark, Tellabs Denmark, IONAS and IBSEN Microstructures we have investigated transmission in a new wavelength window named the L-band (1565 nm to 1610 nm). New fiber lasers have been used as transmitters, amplifiers have been designed and implemented and successful transmission experiments have been carried out. Transmission over 1000 km of a 10 Gbit/s signal at 1597 nm has been demonstrated in a re-circulating loop using standard fiber and new wideband dispersion compensating fiber. Furthermore, we have also investigated wavelength conversion from the conventional C-band window (1535-1565 nm) to the new L-band window. Efficient regenerative wavelength conversion at 10 Gbit/s from a signal at 1546 nm to 1609 nm was obtained.
Effective start/end date01/01/199931/12/2002