Explanipedia

FLEX-SCALE: A Disruptive Approach Toward Flexibly Scalable Energy Efficient Networking Open

Josep M. Fàbrega, Raül Muñoz, Dan M. Marom, José Manuel Rivas-Moscoso, Michael Enrico , et al. · 2025

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Machine Learning in Short-Reach Optical Systems: A Comprehensive Survey Open

Chen Shao, Elias Giacoumidis, Syed Moktacim Billah, Shi Li, Jialei Li , et al. · 2024

Recently, extensive research has been conducted to explore the utilization of machine learning (ML) algorithms in various direct-detected and (self)-coherent short-reach communication applications. These applications encompass a wide range…

Advanced Equalization in 112 Gb/s Upstream PON Using a Novel Fourier Convolution-based Network Open

Chen Shao, Elias Giacoumidis, Patrick Matalla, Jialei Li, Shi Li , et al. · 2024

We experimentally demonstrate a novel, low-complexity Fourier Convolution-based Network (FConvNet) based equalizer for 112 Gb/s upstream PAM4-PON. At a BER of 0.005, FConvNet enhances the receiver sensitivity by 2 and 1 dB compared to a 51…

Machine Learning in Short-Reach Optical Systems: A Comprehensive Survey Open

Chen Shao, Syed Moktacim Billah, Elias Giacoumidis, Li Shi, Jialei Li , et al. · 2024

In recent years, extensive research has been conducted to explore the utilization of machine learning algorithms in various direct-detected and self-coherent short-reach communication applications. These applications encompass a wide range…

A Novel Machine Learning-based Equalizer for a Downstream 100G PAM-4 PON Open

Chen Shao, Elias Giacoumidis, Shi Li, Jialei Li, Michael Faerber , et al. · 2024

A frequency-calibrated SCINet (FC-SCINet) equalizer is proposed for down-stream 100G PON with 28.7 dB path loss. At 5 km, FC-SCINet improves the BER by 88.87% compared to FFE and a 3-layer DNN with 10.57% lower complexity.

Experimental Assessment of Digital Predistortion Using Reinforcement Learning for 5G Analog Radio over Fiber Links Open

Muhammad Usman Hadi, Rahmatullah Qureshi, Elias Giacoumidis, André Richter, Muhammad Atif Ur Rehman , et al. · 2024

Radio over Fiber (RoF) is pivotal for extending reliable 5G connectivity to enhanced remote area communications (ERAC) use cases, that can be used for transporting analog signals from the central office to a simplified remote base station,…

QAMeleon 128Gbd transmission simulation raw data Open

Braulio Gomez Saaverda, Elias Giacoumidis · 2023

VPI has supported simulations for transmission of 128 Gbaud DP-16-QAM, 4 bits/symbol 128 Gbaud DP-PS-64QAM and 3.5 bits/symbol DP-PS-16QAM at 146.28 Gbaud

QAMeleon 128Gbd transmission simulation raw data Open

Braulio Gomez Saaverda, Elias Giacoumidis · 2023

VPI has supported simulations for transmission of 128 Gbaud DP-16-QAM, 4 bits/symbol 128 Gbaud DP-PS-64QAM and 3.5 bits/symbol DP-PS-16QAM at 146.28 Gbaud

QAMeleon Physical layer evaluation of 1x24 WSS targeting flex-grid operation simulation raw data Open

Braulio Gomez Saaverda, Elias Giacoumidis · 2023

Physical layer simulations of 1x24 WSS has been supported, targeting flex-grid operation for transmission of 16-QAM and 64-QAM at 32, 64, and 128 Gbaud

QAMeleon Physical layer evaluation of 1x24 WSS targeting flex-grid operation simulation raw data Open

Braulio Gomez Saaverda, Elias Giacoumidis · 2023

Physical layer simulations of 1x24 WSS has been supported, targeting flex-grid operation for transmission of 16-QAM and 64-QAM at 32, 64, and 128 Gbaud

Effective handling of nonlinear distortions in CO-OFDM using affinity propagation clustering Open

Jinlong Wei, Elias Giacoumidis, Ji Zhou, Mutsam A. Jarajreh, Shi Li , et al. · 2022

We experimentally demonstrate a system-agnostic and training-data-free nonlinearity compensator, using affinity propagation (AP) clustering in single- and multi-channel coherent optical OFDM (CO-OFDM) for up to 3200 km transmission. We sho…

Self-Phase Modulation and Inter-Polarization Cross-Phase Modulation Mitigation in Single-Channel Dp-16qam Coherent Pon Employing 4d Clustering Open

Camila Pinto da Costa, Lúcio Borges, Rafael A. Penchel, Marcelo L. F. Abbade, Elias Giacoumidis , et al. · 2022

Low Complexity DSP for High Speed Optical Access Networking Open

Jinlong Wei, Cedric F. Lam, Ji Zhou, Ivan Aldaya, Elias Giacoumidis , et al. · 2021

A novel low-cost and energy-efficient approach for reaching 40 Gb/s signals is proposed for cost-sensitive optical access networks. Our proposed design is constituted of an innovative low-complex high-performance digital signal processing …

Coupled Transceiver-Fiber Nonlinearity Compensation Based on Machine Learning for Probabilistic Shaping System Open

Tú Thanh Nguyễn, Tingting Zhang, Elias Giacoumidis, Abdallah A. I. Ali, Mingming Tan , et al. · 2020

In this article, we experimentally demonstrate the combined benefit of artificial neural network-based nonlinearity compensation and probabilistic shaping for the first time. We demonstrate that the scheme not only compensates for transcei…

Compensation of nonlinear distortion in coherent optical OFDM systems using a MIMO deep neural network-based equalizer Open

Ivan Aldaya, Elias Giacoumidis, Athanasios Tsokanos, Mutsam A. Jarajreh, Yannuo Wen , et al. · 2020

A novel nonlinear equalizer based on a multiple-input multiple-output (MIMO) deep neural network (DNN) is proposed and experimentally demonstrated for compensation of inter-subcarrier nonlinearities in a 40 Gb/s coherent optical orthogonal…

Optics for AI and AI for Optics Open

Jinlong Wei, Alan Pak Tao Lau, Lilin Yi, Elias Giacoumidis, Qixiang Cheng · 2020

Artificial intelligence is deeply involved in our daily lives via reinforcing the digital transformation of modern economies and infrastructure. It relies on powerful computing clusters, which face bottlenecks of power consumption for both…

Special Issue on “Optics for AI and AI for Optics” Open

Jinlong Wei, Lilin Yi, Elias Giacoumidis, Qixiang Cheng, Alan Pak Tao Lau · 2020

We live in an era of information explosion and digital revolution that has resulted in rapid technological developments in different aspects of life [...]

Real-time machine learning based fiber-induced nonlinearity compensation in energy-efficient coherent optical networks Open

Elias Giacoumidis, Yi Lin, Michaela Blott, Liam P. Barry · 2020

We experimentally demonstrate the world’s first field-programmable gate-array-based real-time fiber nonlinearity compensator (NLC) using sparse K-means++ machine learning clustering in an energy-efficient 40-Gb/s 16-quadrature amplitude mo…

Histogram Based Clustering for Nonlinear Compensation in Long Reach Coherent Passive Optical Networks Open

Ivan Aldaya, Elias Giacoumidis, Geraldo de Oliveira, Jinlong Wei, Julián L. Pita , et al. · 2019

In order to meet the increasing capacity requirements, network operators are extending their optical infrastructure closer to the end-user while making more efficient use of the resources. In this context, long reach passive optical networ…

A Blind Nonlinearity Compensator Using DBSCAN Clustering for Coherent Optical Transmission Systems Open

Elias Giacoumidis, Yi Lin, Mutsam A. Jarajreh, Sean O’Dúill, Kevin McGuinness , et al. · 2019

Coherent fiber-optic communication systems are limited by the Kerr-induced nonlinearity. Benchmark optical and digital nonlinearity compensation techniques are typically complex and tackle deterministic-induced nonlinearities. However, the…

Real-Time Machine Learning Based Fiber-Induced Nonlinearity Compensation\n in Energy-Efficient Coherent Optical Networks Open

Elias Giacoumidis, Lin Yi, Michaela Blott, Liam P. Barry · 2019

We experimentally demonstrate the first field-programmable gate-array-based\nreal-time fiber nonlinearity compensator (NLC) using sparse K-means++ machine\nlearning clustering in an energy-efficient 40-Gb/s 16-quadrature amplitude\nmodulat…

A Blind Nonlinearity Compensator Using DBSCAN Clustering for Coherent Optical Transmission Systems Open

Elias Giacoumidis, Yi Lin, Mutsam A. Jarajreh, Sean O’Dúill, Kevin McGuinness , et al. · 2019

We experimentally demonstrate, for the first time, blind nonlinearity compensation using the Density-Based Spatial-Clustering of Applications with Noise (DBSCAN) algorithm for a 40-Gb/s 16-quadrature amplitude modulated being transmitted a…

DBSCAN for nonlinear equalization in high-capacity multi-carrier optical communications Open

Elias Giacoumidis, Yi Lin, Liam P. Barry · 2019

Coherent optical multi-carrier communications have recently dominated metro-regional and long-haul optical communications. However, the major obstacle of networks involving coherent multi-carrier signals such as coherent optical orthogonal…

Harnessing machine learning for fiber-induced nonlinearity mitigation in long-haul coherent optical OFDM Open

Elias Giacoumidis, Yi Lin, Jinlong Wei, Ivan Aldaya, Athanasios Tsokanos , et al. · 2018

Coherent optical orthogonal frequency division multiplexing (CO-OFDM) has attracted a lot of interest in optical fiber communications due to its simplified digital signal processing (DSP) units, high spectral-efficiency, flexibility, and t…

Fiber-induced nonlinearity compensation in coherent optical systems by affinity propagation soft-clustering Open

Elias Giacoumidis, Jinlong Wei, Ivan Aldaya, Christian Sánchez, Hichem Mrabet , et al. · 2018

There is a tremendous need to maximize signal capacity without sacrificing energy consumption and complexity in optical fiber communications due to the rise of network traffic demand and critical latency-aware services such as telemedicine…

DSP-Based 40 GB/s Lane Rate Next-Generation Access Networks Open

Jinlong Wei, Ji Zhou, Elias Giacoumidis, Paul Anthony Haigh, Jianming Tang · 2018

To address the continuous growth in high-speed ubiquitous access required by residential users and enterprises, Telecommunication operators must upgrade their networks to higher data rates. For optical fiber access networks that directly c…

A Survey on High-Capacity OFDM-based Passive Optical Networks Open

Mohammad Ghanbarisabagh, Gobi Vetharatnam, Elias Giacoumidis, Hossein Rouzegar, Nasreddine Mallouki · 2018

The exponential growth of demand for high-speed internet and high bandwidth applications such as interactive entertainment in access networks mandates the requirement for higher optical signal speeds. On the other hand, since cost and ener…

Chip-based Brillouin processing for carrier recovery in self-coherent optical communications Open

Elias Giacoumidis, Amol Choudhary, Eric Mägi, David Marpaung, Khu Vu , et al. · 2018

Modern fiber-optic coherent communications employ advanced, spectrally efficient modulation formats that require sophisticated narrow-linewidth local oscillators (LOs) and complex digital signal processing (DSP). Self-coherent optical orth…

Performance analysis of AO‐OFDM‐CDMA with advanced 2D‐hybrid coding for amplifier‐free LR‐PONs Open

Hichem Mrabet, Sofien Mhatli, Iyad Dayoub, Elias Giacoumidis · 2018

All‐optical orthogonal frequency division multiplexing (AO‐OFDM) and optical code‐division multiple‐access system (OCDMA) are combined in the first analytical model, which considers subcarrier hopping by means of advanced two‐dimensional (…

Unsupervised Support Vector Machines for Nonlinear Blind Equalization in CO-OFDM Open

Elias Giacoumidis, Athanasios Tsokanos, Mohammad Ghanbarisabagh, Sofien Mhatli, Liam P. Barry · 2018

A novel blind nonlinear equalization (BNLE) technique based on the iterative re-weighted least square is experimentally demonstrated for single and multi-channel coherent optical orthogonal frequency-division multiplexing (CO-OFDM). The ad…

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