Search Results for author: Darko Zibar

Found 28 papers, 2 papers with code

BICM-compatible Rate Adaptive Geometric Constellation Shaping Using Optimized Many-to-one Labeling

no code implementations10 Nov 2023 Metodi Plamenov Yankov, Smaranika Swain, Ognjen Jovanovic, Darko Zibar, Francesco Da Ros

The GCS scheme is experimentally demonstrated in a multi-span recirculating loop coherent optical fiber transmission system with a total distance of up to 3000 km.

Quantization

Multi-parallel-task Time-delay Reservoir Computing combining a Silicon Microring with WDM

no code implementations25 Oct 2023 Bernard J. Giron Castro, Christophe Peucheret, Darko Zibar, Francesco Da Ros

We numerically demonstrate a microring-based time-delay reservoir computing scheme that simultaneously solves three tasks involving time-series prediction, classification, and wireless channel equalization.

Time Series Time Series Prediction

Effects of cavity nonlinearities and linear losses on silicon microring-based reservoir computing

no code implementations13 Oct 2023 Bernard J. Giron Castro, Christophe Peucheret, Darko Zibar, Francesco Da Ros

Microring resonators (MRRs) are promising devices for time-delay photonic reservoir computing, but the impact of the different physical effects taking place in the MRRs on the reservoir computing performance is yet to be fully understood.

Time Series Time Series Prediction

Differentiable Machine Learning-Based Modeling for Directly-Modulated Lasers

no code implementations27 Sep 2023 Sergio Hernandez, Ognjen Jovanovic, Christophe Peucheret, Francesco Da Ros, Darko Zibar

End-to-end learning has become a popular method for joint transmitter and receiver optimization in optical communication systems.

Optimization of Raman amplifiers: a comparison between black-, grey- and white-box modeling

no code implementations11 Sep 2023 Metodi P. Yankov, Mehran Soltani, Andrea Carena, Darko Zibar, Francesco Da Ros

Designing and optimizing optical amplifiers to maximize system performance is becoming increasingly important as optical communication systems strive to increase throughput.

Low-complexity Samples versus Symbols-based Neural Network Receiver for Channel Equalization

no code implementations28 Aug 2023 Yevhenii Osadchuk, Ognjen Jovanovic, Stenio M. Ranzini, Roman Dischler, Vahid Aref, Darko Zibar, Francesco Da Ros

In this work, we propose a low-complexity NN that performs samples-to-symbol equalization, meaning that the NN-based equalizer includes match filtering and downsampling.

Addressing Data Scarcity in Optical Matrix Multiplier Modeling Using Transfer Learning

no code implementations10 Aug 2023 Ali Cem, Ognjen Jovanovic, Siqi Yan, Yunhong Ding, Darko Zibar, Francesco Da Ros

We present and experimentally evaluate using transfer learning to address experimental data scarcity when training neural network (NN) models for Mach-Zehnder interferometer mesh-based optical matrix multipliers.

Transfer Learning

Rate Adaptive Geometric Constellation Shaping Using Autoencoders and Many-To-One Mapping

no code implementations19 Jul 2023 Metodi P. Yankov, Ognjen Jovanovic, Darko Zibar, Francesco Da Ros

A many-to-one mapping geometric constellation shaping scheme is proposed with a fixed modulation format, fixed FEC engine and rate adaptation with an arbitrarily small step.

Impact of Free-carrier Nonlinearities on Silicon Microring-based Reservoir Computing

no code implementations13 Jul 2023 Bernard J. Giron Castro, Christophe Peucheret, Darko Zibar, Francesco Da Ros

We quantify the impact of thermo-optic and free-carrier effects on time-delay reservoir computing using a silicon microring resonator.

Data-Driven Modeling of Directly-Modulated Lasers

no code implementations15 May 2023 Sergio Hernandez Fernandez, Christophe Peucheret, Ognjen Jovanovic, Francesco Da Ros, Darko Zibar

The end-to-end optimization of links based on directly-modulated lasers may require an analytically differentiable channel.

Data-efficient Modeling of Optical Matrix Multipliers Using Transfer Learning

no code implementations29 Nov 2022 Ali Cem, Ognjen Jovanovic, Siqi Yan, Yunhong Ding, Darko Zibar, Francesco Da Ros

We demonstrate transfer learning-assisted neural network models for optical matrix multipliers with scarce measurement data.

Transfer Learning

Reservoir Computing-based Multi-Symbol Equalization for PAM 4 Short-reach Transmission

no code implementations29 Nov 2022 Yevhenii Osadchuk, Ognjen Jovanovic, Darko Zibar, Francesco Da Ros

We propose spectrum-sliced reservoir computer-based (RC) multi-symbol equalization for 32-GBd PAM4 transmission.

Data-driven Modeling of Mach-Zehnder Interferometer-based Optical Matrix Multipliers

no code implementations17 Oct 2022 Ali Cem, Siqi Yan, Yunhong Ding, Darko Zibar, Francesco Da Ros

Photonic integrated circuits are facilitating the development of optical neural networks, which have the potential to be both faster and more energy efficient than their electronic counterparts since optical signals are especially well-suited for implementing matrix multiplications.

Experimental validation of machine-learning based spectral-spatial power evolution shaping using Raman amplifiers

no code implementations26 Sep 2022 Mehran Soltani, Francesco Da Ros, Andrea Carena, Darko Zibar

In this case, the experimental results assert that for 2D profiles with the target flat gain levels, the DE obtains less than 1 dB maximum gain deviation, when the setup is not physically limited in the pump power values.

Flexible Raman Amplifier Optimization Based on Machine Learning-aided Physical Stimulated Raman Scattering Model

no code implementations13 Jun 2022 Metodi Plamenov Yankov, Francesco Da Ros, Uiara Celine de Moura, Andrea Carena, Darko Zibar

The forward propagation model is combined with an experimentally-trained ML model of a backward-pumping Raman amplifier to jointly optimize the frequency and power of the forward amplifier's pumps and the powers of the backward amplifier's pumps.

Experimental Validation of Spectral-Spatial Power Evolution Design Using Raman Amplifiers

no code implementations16 May 2022 Mehran Soltani, Francesco Da Ros, Andrea Carena, Darko Zibar

We experimentally validate a machine learning-enabled Raman amplification framework, capable of jointly shaping the signal power evolution in two domains: frequency and fiber distance.

BIG-bench Machine Learning

Comparison of Models for Training Optical Matrix Multipliers in Neuromorphic PICs

no code implementations23 Nov 2021 Ali Cem, Siqi Yan, Uiara Celine de Moura, Yunhong Ding, Darko Zibar, Francesco Da Ros

We experimentally compare simple physics-based vs. data-driven neural-network-based models for offline training of programmable photonic chips using Mach-Zehnder interferometer meshes.

End-to-end Learning of a Constellation Shape Robust to Channel Condition Uncertainties

no code implementations16 Nov 2021 Ognjen Jovanovic, Metodi P. Yankov, Francesco Da Ros, Darko Zibar

Two noise models are considered for the additive noise: white Gaussian noise and nonlinear interference noise model for fiber nonlinearities.

End-to-end Learning of a Constellation Shape Robust to Variations in SNR and Laser Linewidth

no code implementations1 Jun 2021 Ognjen Jovanovic, Metodi P. Yankov, Francesco Da Ros, Darko Zibar

We propose an autoencoder-based geometric shaping that learns a constellation robust to SNR and laser linewidth estimation errors.

Gradient-free training of autoencoders for non-differentiable communication channels

no code implementations21 Dec 2020 Ognjen Jovanovic, Metodi Plamenov Yankov, Francesco Da Ros, Darko Zibar

Our results indicate that the autoencoder can be successfully optimized using the proposed training method to achieve better robustness to residual phase noise with respect to standard constellation schemes such as Quadrature Amplitude Modulation and Iterative Polar Modulation for the considered conditions.

Simultaneous gain profile design and noise figure prediction for Raman amplifiers using machine learning

no code implementations9 Dec 2020 Uiara Celine de Moura, Ann Margareth Rosa Brusin, Andrea Carena, Darko Zibar, Francesco Da Ros

A machine learning framework predicting pump powers and noise figure profile for a target distributed Raman amplifier gain profile is experimentally demonstrated.

Applied Physics Optics

End-to-end optimization of coherent optical communications over the split-step Fourier method guided by the nonlinear Fourier transform theory

no code implementations11 Sep 2020 Simone Gaiarin, Francesco Da Ros, Rasmus T. Jones, Darko Zibar

In this first numerical analysis, the detection is performed by a neural network (NN), whereas the symbol-to-waveform mapping is aided by the nonlinear Fourier transform (NFT) theory in order to simplify and guide the optimization on the modulation side.

End-to-end Learning for GMI Optimized Geometric Constellation Shape

1 code implementation19 Jul 2019 Rasmus T. Jones, Metodi P. Yankov, Darko Zibar

Autoencoder-based geometric shaping is proposed that includes optimizing bit mappings.

Deep Learning of Geometric Constellation Shaping including Fiber Nonlinearities

no code implementations10 May 2018 Rasmus T. Jones, Tobias A. Eriksson, Metodi P. Yankov, Darko Zibar

A new geometric shaping method is proposed, leveraging unsupervised machine learning to optimize the constellation design.

BIG-bench Machine Learning

An Overview on Application of Machine Learning Techniques in Optical Networks

no code implementations21 Mar 2018 Francesco Musumeci, Cristina Rottondi, Avishek Nag, Irene Macaluso, Darko Zibar, Marco Ruffini, Massimo Tornatore

Advanced mathematical tools are required to extract meaningful information from these data and take decisions pertaining to the proper functioning of the networks from the network-generated data.

BIG-bench Machine Learning Management

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