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All-Optical Signal Processing pp 217–260Cite as

All-Optical Pulse Shaping for Highest Spectral Efficiency

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Part of the book series: Springer Series in Optical Sciences ((SSOS,volume 194))

Abstract

Pulse shaping gives communications engineers another degree of freedom in designing a link. It holds promise to allow extending transmission reach, achieve optical multiplexing at highest spectral efficiency or to limit nonlinear distortions. A variety of pulse shapes—rectangular, sinc, raised cosine to cite just a few—have been investigated but the important question is how optical transmitters can generate such pulses at the necessary speed. Should the transmitter be realized in the digital domain, the all-optical domain or can it be implemented as a hybrid? In this chapter, the fundamentals for pulse shaping in transmitters and receivers are reviewed. A particular emphasis is on orthogonal frequency division multiplexing (OFDM) where the system’s data are encoded onto subcarriers with a rectangularly shaped impulse response, and Nyquist pulse shaping where the symbols are carried by Nyquist pulses. Electronic, digital and optical processors are described and recent experimental demonstrations are reported.

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Acknowledgments

Juerg Leuthold acknowledges contributions from the EU-Project FOX-C and support by ETH Zurich, Switzerland. Juerg Leuthold is also very much indebted to Wolfgang Freude from Karlsruhe Institute of Technology (KIT) with whom he collaborated in the past and who contributed a lot to the OFDM section in this chapter. Camille Brès acknowledges support by the EPFL Lausanne, Switzerland.

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  1. Institute of Electromagnetic Fields, ETH-Zurich, ETZ K 81, Gloriastrasse 35, CH-8092, Zurich, Switzerland

    Juerg Leuthold

  2. Institute of Electrical Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 11, CH-1015, Lausanne, Switzerland

    Camille-Sophie Brès

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Correspondence to Juerg Leuthold .

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  1. Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Brescia, Brescia, Italy

    Stefan Wabnitz

  2. CUDOS, School of Physics, University of Sydney, Sydney, New South Wales, Australia

    Benjamin J. Eggleton

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Leuthold, J., Brès, CS. (2015). All-Optical Pulse Shaping for Highest Spectral Efficiency. In: Wabnitz, S., Eggleton, B. (eds) All-Optical Signal Processing. Springer Series in Optical Sciences, vol 194. Springer, Cham. https://doi.org/10.1007/978-3-319-14992-9_8

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