Tuesday, June 8, 2010

Alcatel-Lucent Pushes Ahead with 100G Coherent Optical Transmission

Alcatel-Lucent introduced its next-generation, 100 Gbps coherent optical transmission technology for overcoming fiber impairments across the network. The technology, which was developed in-house by Bell Labs, leverages an ultra fast baud-rate monolithic digital signal processor implemented in CMOS along with 100G PDM-QPSK modulation. This combination eliminates need for external PMD/CD compensators, enabling the transmission of 100G wavelengths alongside existing 10G/40G wavelengths over the existing fiber plant.


Alcatel-Lucent said its coherent detection and 100G PDM-QPSK (Polarization Division Multiplexing - Quadri-Phase Shift Keying,# Binary-Phase Shift Keying) modulation offer maximum compatibility with existing lower speed infrastructures. The technology is now availability in the 1830 Photonic Service Switch (PSS) and is also being deployed on all of Alcatel-Lucent's DWDM platforms.


The company also confirmed that the 100G-capable 1830 PSS has been selected by SOFTBANK TELECOM Corp. to upgrade its backbone network. Additionally, Alcatel-Lucent's next-generation coherent technology has already been successfully tested with Tier-1 customers worldwide, including Telefonica.
http://www.alcatel-lucent.comIn October 2008, Alcatel-Lucent announced the worldwide commercial availability of its 1830 Photonic Service Switch (PSS), a metro WDM platform offering a "Zero Touch Photonics" value proposition. Alcatel-Lucent said its Zero Touch Photonics eliminates the need for frequent on-site interventions and provides a WDM network that is more flexible to design and install, easier to operate, manage and monitor, where wavelength services can be deployed faster and reconfigured according to more dynamic traffic demands.


The Alcatel-Lucent 1830 PSS features a fully tunable and reconfigurable (T&ROADM) architecture for wavelength switching, and integrates optical monitoring capabilities for end-to-end photonic traffic monitoring and fault localization at the wavelength level. Key features include:

  • High-density multiplexer/demultiplexer (mux/demux) per network element (NE)/degree

  • Wavelength Tracker monitors and traces each wavelength at any point in the network

  • Static, tunable/reconfigurable optical add/ drop multiplexer (T/ROADM) with single-wavelength add/drop granularity

  • Up to 44 wavelengths 100 GHz ITU WDM per fiber pair

  • Support for the full range of network topologies, including ring, point-to-point and arbitrary optical mesh topologies.

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