Optical sinc-shaped Nyquist pulses of exceptional quality

Marcelo A. Soto (), Mehdi Alem, Mohammad Amin Shoaie, Armand Vedadi, Camille-Sophie Brès, Luc Thévenaz and Thomas Schneider
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Marcelo A. Soto: EPFL Swiss Federal Institute of Technology, Group for Fibre Optics
Mehdi Alem: EPFL Swiss Federal Institute of Technology, Group for Fibre Optics
Mohammad Amin Shoaie: EPFL Swiss Federal Institute of Technology, Photonic Systems Laboratory
Armand Vedadi: EPFL Swiss Federal Institute of Technology, Photonic Systems Laboratory
Camille-Sophie Brès: EPFL Swiss Federal Institute of Technology, Photonic Systems Laboratory
Luc Thévenaz: EPFL Swiss Federal Institute of Technology, Group for Fibre Optics
Thomas Schneider: EPFL Swiss Federal Institute of Technology, Group for Fibre Optics

Nature Communications, 2013, vol. 4, issue 1, 1-11

Abstract: Abstract Sinc-shaped Nyquist pulses possess a rectangular spectrum, enabling data to be encoded in a minimum spectral bandwidth and satisfying by essence the Nyquist criterion of zero inter-symbol interference (ISI). This property makes them very attractive for communication systems since data transmission rates can be maximized while the bandwidth usage is minimized. However, most of the pulse-shaping methods reported so far have remained rather complex and none has led to ideal sinc pulses. Here a method to produce sinc-shaped Nyquist pulses of very high quality is proposed based on the direct synthesis of a rectangular-shaped and phase-locked frequency comb. The method is highly flexible and can be easily integrated in communication systems, potentially offering a substantial increase in data transmission rates. Further, the high quality and wide tunability of the reported sinc-shaped pulses can also bring benefits to many other fields, such as microwave photonics, light storage and all-optical sampling.

Date: 2013
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DOI: 10.1038/ncomms3898

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