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News Release from: Siemens ICN
Edited by the Electronicstalk Editorial Team on 9 September 2002

ECOC paper looks at all-optical demultiplexing

At ECOC 2002 in Copenhagen Siemens ICN will report on all-optical demultiplexing - one of the key technologies to enable optical time division multiplexed transmission in future networks.

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At ECOC 2002 in Copenhagen Siemens ICN will report on all-optical demultiplexing which will be one of the key technologies to enable optical time division multiplexed (OTDM) transmission in future optical networks operating at single channel datarates of 160Gbit/s and higher. While fibre-based interferometric switches have already been employed successfully for demultiplexing datarates up to 640Gbit/s, semiconductor optical amplifier (SOA)-based optical gates are much more attractive for system applications. They feature high compactness and lower switching pulse energies due to high optical nonlinearities.

Superior stability can furthermore be obtained by choosing an integrated design where SOAs are embedded in an interferometric waveguide structure.

Recently, error-free demultiplexing of 336 to 10Gbit/s has been reported by employing a hybrid-integrated SOA-Mach-Zehnder interferometer (SOA-MZI).

For monolithically integrated SOA-MZI switches 160 to 10Gbit/s demultiplexing has been demonstrated.

However, until now, the bit error rate (BER) performance indicated an error floor.

Siemens ICN will demonstrate true error-free 160 to 10Gbit/s demultiplexing with a monolithically integrated SOA-MZI, and we show that the Siemens' switch is also capable to operate at a base datarate of 40Gbit/s.

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