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2008-2009 Research Activities Print

Activities on Digital Optical Transmission Systems (CE1)

Transmitting 100Gb/s PM-QPSK signals in Torino ring network

 Researchers from POLITO and HHI joined forces with Industrial Affiliates FASTWEB and CISCO Photonics together with AVANEX and TeleOptix for transmitting 100 Gb/s optical signals (PM-QPSK) over 2000 km of uncompensated Standard Single Mode Fiber (SSMF) installed in the FASTWEB Metro network of the city of Turin. CISCO Photonics provided the amplifiers for the re-circulating loop set-up and assisted with the programming of firmware for obtaining best experimental results. FASTWEB provided access to dark fiber installed within its operational cables in the city of Torino. Lastly, AVANEX and TeleOptix provided necessary state-of-the-art equipment including high-modulators and balanced receivers.

HHI coordinates efforts on higher-order modulation formats with VPI Systems and ADVA

Through the Joint Experimental Activity (JEA) 1.8, HHI and other partners involved collaborated with VPI Systems and ADVA on higher order modulation formats for increasing the overall efficiency and capacity of future core optical networks.

Optical Time Domain Multiplexing for Terabit Switching

TU/e initiated a collaboration framework with Nokia Siemens Networks in Germany and Fujitsu Labs in Japan on Optical Time Domain Multiplexing, a promising technique for upgrading channel bit-rates at terabit/second.


Activities on Optical Sources & Amplification Systems (CE2)

Research on central light sources for WDM-PONs

Ericsson ltd worked closely with researchers from SSSUP for designing and developing multi-wavelength optical sources to be used as central light sources in high-capacity Wavelength Division Multiplexed Passive Optical Networks (WDM-PONs).

Agile multi-wavelength sources

ICCS/NTUA worked in collaboration with GigaTera, Crystal Fiber and EXELITE Innovations on the development of new designs for agile multi-wavelength optical sources suitable for high-capacity DWDM and 100GbE optical networks.


Activities on High-Speed Optical Network Subsystems (CE3)

Research on advanced optical signal processing systems and regenerators

ICCS/NTUA, SSSUP and TU/e focused on implementing intelligent network functionalities directly in the optical layer. The partners designed and developed an 160 Gb/s all-optical contention resolution system with additional equipment provided by CIP Technologies, HHI, AIT and U2t Photonics.

CIP Technologies, a photonics component vendor developing 40 Gb/s optical regenerators provided hybrid integrated optical switch to ICCS/NTUA and AIT for designing and testing the transmission performance of a novel 2R regeneration technique.

KIT collaborated with Optium Corp (now Finisar) for designing and developing optical format conversion systems. A return-to-Zero to Carrier-Suppressed Return-to-Zero format converter was demonstrated at 42.7Gbit/sec and exhibits regenerative properties.

Alcatel-Thales III-V Lab collaborated with KIT for developing high-speed wavelength conversion systems using Quantum-Dash semiconductor devices and suitable optical filters.

DTU worked on designing new optical regenerators for Phase-Encoded systems using Highly-Non-Linear Fibers developed by OFS Fitel in Denmark. Using these fibers, DTU's work focused on enhancing the dynamic range and amplitude regeneration in Single Pump Fibre Optic Parametric Amplifiers using DPSK signals.

New Optical Sampling Oscilloscopes to work with phase-encoded signals

CHALMERS performed joint work with Picosolve for developing more advanced optical sampling systems capable of operating with high-speed phase-encoded optical signals. The two partners worked closely together for developing new system concepts for extending the operation of optical sampling oscilloscopes to be used for DPSK, DQPSK, D8PS and other higher-order and complex modulation formats. First results show successful analysis with sub-picosencond resolution using 42.6 Gbit/s NRZ-DPSK and 170.4 Gbit/s RZ-DPSK signals.


Activities on Next-generation Optical Access Subsystems (CE4)

Focusing on next generation faster, longer and more cost-efficient PONs

France Telecom/Orange Labs collaborated with UPC and Insititut Telecom on next generation passive optical networks (PONs). The joint work was centered on extending the reach and how to battle signal distortions induced by optical amplifiers in passive networks.

VPI Systems and UPC initiated joint research on Rayleigh Backscattering mitigation techniques. Alcatel-Thales III-V labs worked together with UPC on optical devices for subsystems for next-generation Passive Optical Networks.

Tellabs and UPC collaborated on the research topic of Remotely-Powered Remote Nodes. Researchers from UPC studied the capacity of Remotely-Powered reconfigurable Remote Node prototypes to maintain GPON traffic and recover the link of GPON after a high increase of losses in the network, using GPON equipment from Tellabs.

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