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Electronically synthesized Nyquist pulses for photonic sampling of microwave signals

Vercesi, V; Onori, D; Davies, J; Seeds, A; Liu, CP; (2017) Electronically synthesized Nyquist pulses for photonic sampling of microwave signals. Optics Express , 25 (23) pp. 29249-29259. 10.1364/OE.25.029249. Green open access

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Abstract

We report electronic generation of optical Nyquist pulses using an arbitrary waveform generator (AWG) followed by a Mach Zehnder modulator (MZM), providing a simple, highly stable and flexible technique to perform photonic sampling. Here, we demonstrate the generation of 10 GHz periodic optical Nyquist pulses by synthesizing both all-positive and alternate positive-negative electrical pulse trains using a 25 GHz bandwidth AWG. Biasing the MZM at null ensures the meeting of the Nyquist ISI-free criterion in the optical domain and allows for pulse compression. Moreover, we report the first photonic sampling and demodulation of 1 Gbaud 16- and 32-QAM signals up to 22.5 GHz using 10 GHz optical Nyquist sampling pulse trains.

Type: Article
Title: Electronically synthesized Nyquist pulses for photonic sampling of microwave signals
Open access status: An open access version is available from UCL Discovery
DOI: 10.1364/OE.25.029249
Publisher version: https://doi.org/10.1364/OE.25.029249
Language: English
Additional information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Keywords: Radio frequency photonics; Analog optical signal processing; Pulses; Microwaves
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10037655
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