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.
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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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