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Optical time division multiplexing: systems and networks

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3 Author(s)
Spirit, D.M. ; Network Res. Unit, British Telecom Res. Labs., Ipswich, UK ; Ellis, Andrew D. ; Barnsley, P.E.

The recent advances in optical time division multiplexed (OTDM) systems and components research show the technique to be highly suited to the generation and transmission of high capacity data on a single optical carrier. This approach uses a single wavelength to carry capacities of at least 40 Gb/s. Such systems are based on a clock frequency and tributary data rates which are easily accessible using electronic components. Short optical pulses are used in a return-to-zero data transmission format with temporal interleaving to map a number of optical data channels into a single electronic clock cycle. It is an approach that can be used to achieve extremely high data-rate bit interleaved systems. This article summarizes the developments in this field and outlines a possible methodology to evolve transport networks to encompass the potential that both WDM and OTDM have to offer.<>

Published in:

Communications Magazine, IEEE  (Volume:32 ,  Issue: 12 )