All-optical multiplexing schemes for multiple access networks based on wavelet packet filter banks

Gabriella Cincotti; Michela Svaluto Moreolo; Alessandro Neri

doi:10.1117/12.545484

18 August 2004 All-optical multiplexing schemes for multiple access networks based on wavelet packet filter banks

Gabriella Cincotti, Michela Svaluto Moreolo, Alessandro Neri

Proceedings Volume 5451, Integrated Optics and Photonic Integrated Circuits; (2004) https://doi.org/10.1117/12.545484
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

All optical architectures for Wavelet Packet Division Multiplexing (WPDM) are presented, that can be used in multiple access networks to increase the number of simultaneous users. Wavelet waveform coding spreads data signals both in time and frequency domains, with a large capacity improvement with respect to standard Optical-Code Division Multiple Access (O-CDMA) systems. In addition, the orthogonal property of the wavelet atoms ensures low InterSymbol Interference (ISI) and Multiple Access Interference (MAI) noises. To exploit the large bandwidth capacity of optical fibres, the Optical-Electrical-Optical (O-E-O) conversion is completely avoided, and we designed an all optical system that realizes the WPDM fully in the optical domain. A single Planar Lightwave Circuit (PLC) device multiplies/demultiplies N different users and a diffractive or an integrated optical device performs the waveform coding/decoding. The Wavelet Packet (WP) encoder/decoder is realized as a tree of lattice-form delay-line filters, and can be integrated on a single device along with the optical waveform modulator, resulting in a compact planar optical system. In addition, we show that different choices of WP encoders/decoders are possible to further enhance the system performances.

Citation Download Citation

Gabriella Cincotti, Michela Svaluto Moreolo, and Alessandro Neri "All-optical multiplexing schemes for multiple access networks based on wavelet packet filter banks", Proc. SPIE 5451, Integrated Optics and Photonic Integrated Circuits, (18 August 2004); https://doi.org/10.1117/12.545484

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