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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Design and demonstration of a novel incoherent optical CDMA system

Glesk, I. and Baby, V. and Brès, C. S. and Prucnal, P. R. and Kwong, W. C. (2005) Design and demonstration of a novel incoherent optical CDMA system. In: Proceedings - IEEE Military Communications Conference MILCOM. IEEE Military Communications Conference, 5 . IEEE, New York, pp. 3155-3161. ISBN 0780393937

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Abstract

A detailed analysis of the scalability of two-dimensional optical codes is presented and two network deployment architectures for optical code division multiple access (OCDMA) are discussed. We present the architecture and or a highly scalable, 2.5 Gb/s per user code design for OCDMA system. The system is scalable to 100 potential and more than 10 simultaneous users, each with BER of less than 10(-9). The system architecture uses fast wavelength-hopping, time-spreading codes. Unlike phase sensitive coherent OCDAM systems, this architecture utilizes standard on-off-keyed optical pulses allocated in the time and wavelength domains. This incoherent OCDMA approach is compatible with existing WDM optical networks and utilizes off-the-shelf components. We discuss a novel optical subsystems design for encoders and decoders that enable the realization of a highly scalable incoherent OCDMA system with rapid reconfigurability. We demonstrate the operation of 4 simultaneous users operating at OC-48 (similar to 2.5 Gbit/s) with a power penalty of < 0.5dB and the reduction of mulliple-access interference using ultra-fast all-optical sampling with newly proposed TOAD-based OCDMA receiver.