Flexible Width Nyquist Pulse Based on a Single Mach-Zehnder Modulator

Hu, Jianqi; Fabbri, Simon J.; Brès, Camille‐Sophie

doi:10.1364/cleo_si.2018.sf3n.6

Cited by 7 publications

(2 citation statements)

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“…Furthermore, the optical filters are not rectangular and a nonlinear element is needed to realize the multiplication between the optical signal and the pulses [15]. A much easier way to generate high-quality sinc-pulse sequences is using one or two Mach-Zehnder Modulators (MZMs) [16]- [18]. The modulators are driven in the linear regime with a number of n sinusoidal frequencies and with changing their driving frequency, the repetition rate and bandwidth of the sequences can be easily adapted [19].…”

Section: Sampling Conceptmentioning

confidence: 99%

High-Bandwidth Arbitrary Signal Detection Using Low-Speed Electronics

et al. 2022

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The growing demand for bandwidth and energy efficiency requires new solutions for signal detection and processing. We demonstrate a concept for high-bandwidth signal detection with low-speed photodetectors and electronics. The method is based on the parallel optical sampling of a highbandwidth signal with sinc-pulse sequences provided by a Mach-Zehnder modulator. For the electronic detection and processing this parallel sampling enables to divide the high-bandwidth optical signal with the bandwidth B into N electrical signals with the baseband bandwidth of B/(2N ). In proof-of-concept experiments with N = 3, we present the detection of 24 GHz optical signals by detectors with a bandwidth of only 4 GHz. For ideal components, the sampling and bandwidth down-conversion does not add an excess error to the signals and even for the nonideal components of our proof-of-concept setup, it is below 1 %. Thus, the rms error for the measurement of the 24 GHz signal was reduced by a factor of about 3.4 and the effective number of bits were increased by 1.8.

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Section: Sampling Conceptmentioning

confidence: 99%

High-Bandwidth Arbitrary Signal Detection Using Low-Speed Electronics

et al. 2022

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“…Using an optical Nyquist pulse source as well as appropriate delay between channels, super-channels can be build based on OTDM. A near perfect Nyquist pulse enables a single optical source to feed multiple low speed modulators in parallel [209]. By aligning the subchannels sinc-shaped pulse peaks and nulls, an ISI-free operation point can be obtained.…”

Section: Simon Fabbrimentioning

confidence: 99%

Roadmap on all-optical processing

Minzioni

Lacava

Tanabe

et al. 2019

J. Opt.

158

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The ability to process optical signals without passing into the electrical domain has always attracted the attention of the research community. Processing photons by photons unfolds new scenarios, in principle allowing for unseen signal processing and computing capabilities. Optical computation can be seen as a large scientific field in which researchers operate, trying to find solutions to their specific needs by different approaches; although the challenges can be substantially different, they are typically addressed using knowledge and technological platforms that are shared across the whole field. This significant know-how can also benefit other scientific communities, providing lateral solutions to their problems, as well as leading to novel applications. The aim of this Roadmap is to provide a broad view of the state-of-the-art in this lively scientific research field and to discuss the advances required to tackle emerging challenges, thanks to contributions authored by experts affiliated to both academic institutions and high-tech industries. The Roadmap is organized so as to put side by side contributions on different aspects of optical processing, aiming to enhance the cross-contamination of ideas between scientists working in three different fields of photonics: optical gates and logical units, high bit-rate signal processing and optical quantum computing. The ultimate intent of this paper is to provide guidance for young scientists as well as providing research-funding institutions and stake holders with a comprehensive overview of perspectives and opportunities offered by this research field.

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