Paraskevas Bakopoulos - Academia.edu (original) (raw)
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Papers by Paraskevas Bakopoulos
Zenodo (CERN European Organization for Nuclear Research), Mar 24, 2016
We propose a programmable optical fabric design for Data Center networks that extends SDN to L1. ... more We propose a programmable optical fabric design for Data Center networks that extends SDN to L1. We present experiments on our HPC/ML testbed leveraging the programmable network to automatically failover from hardware or software failures.
Zenodo (CERN European Organization for Nuclear Research), Feb 12, 2017
We experimentally demonstrate distributed denial of service (DDOS) attack identification using De... more We experimentally demonstrate distributed denial of service (DDOS) attack identification using Deep Learning over a photonic neuromorphic engine that supports both input signal and weight update at 50 GHz, reporting a Cohen’s κ-score of 0.636.
Zenodo (CERN European Organization for Nuclear Research), Feb 12, 2017
Journal of Optical Communications and Networking, Apr 12, 2022
The deployment of the new 5G system and ultra-broadband access networks, on one side, and the adv... more The deployment of the new 5G system and ultra-broadband access networks, on one side, and the advent of network disaggregation and cloudification paradigms, on the other, are producing disruptive changes in metropolitan area networks (MANs). The new central offices will be more like small data centers than traditional Telco-type central offices. The presence of general-purpose servers, in partial or total replacement of specialized equipment or cards, and also hosting new functions and services, significantly changes the way the central office is organized and how the equipment internetworks. After having defined a reference architecture named cloudified-MAN, the paper briefly introduces the enabling technologies that include information technology (IT) systems, packet switches, and optical equipment. A disaggregated model is applied to all layers and systems. In the optics field, special insight on high data rate (up to 1.6 Tb/s) transceiver technology developed by the TERIPHIC project is provided as an example of low-cost and low-power technology. Through a quantitative techno-economic case study on a realistic network scenario aimed at short-term and medium-term time horizons, the paper provides indications on what could be the impact of the new architecture on costs and energy consumption. The main outcome of the study is that the IT and optical parts are those with the highest fractions of overall cost, and specifically for the optics, the cost of wavelength division multiplexing transceivers increases significantly in the medium term due to the demand for high-capacity connections (>400Gb/s), while the line system cost (reconfigurable optical add-drop multiplexer) decreases in percentage. Another significant result is that in terms of energy consumption, the IT component has been found to be the dominant one (70%–75% of the total), followed by packet devices (about 20%–25%) and optical systems, the latter with significantly lower percentage values (less than 5%) in all cases analyzed.
Optical Fiber Communication Conference (OFC) 2023
We propose a novel co-packaged optical transceiver architecture capable of operating at 112 Gbaud... more We propose a novel co-packaged optical transceiver architecture capable of operating at 112 Gbaud per lane and scalable to 1.6 Tb/s capacity and beyond for next generation 51.2T and 102.4T digital switches.
Journal of Lightwave Technology
2022 Italian Conference on Optics and Photonics (ICOP)
Photonics in Switching and Computing 2021, 2021
We analyze the design of O-band SOA-based switch architectures in the IMOS platform. Emulated 16×... more We analyze the design of O-band SOA-based switch architectures in the IMOS platform. Emulated 16×16 switches, designed with different architectures, show a worst-case 3dB penalty for the case of 7 cascaded SOAs with 4-channel WDM@25Gbps.
2018 European Conference on Optical Communication (ECOC), 2018
We present our vision towards scaling optical interconnect signalling rates to 200 Gb/s per lane ... more We present our vision towards scaling optical interconnect signalling rates to 200 Gb/s per lane within European project plaCMOS. The concept of a monolithic integration platform combining silicon photonics, plasmonics and SiGe-BiCMOS electronics is introduced and recent progresses are reported.
Applied Sciences, 2019
The soaring demand for higher speeds in datacenters to address the relentless growth of the globa... more The soaring demand for higher speeds in datacenters to address the relentless growth of the global IP traffic places optical interconnects in the spotlight. In this manuscript, we present a high-speed optical transceiver for intra-datacenter connectivity. The transceiver is based on single-mode, single-polarization high-speed vertical-cavity surface-emitting lasers (VCSELs), a VCSEL driver chip, and a linear receiver. Following a step-by-step approach, we present the architectures, assembly processes, and experimental results from the different modules. More specifically, we demonstrate (1) a data transmission experiment at 80 Gb/s using PAM-4 (four-level Pulse Amplitude Modulation) modulation for a reach of up to 500 m by employing a single-mode VCSEL module, and (2) a full-link experiment proving up to 64 Gb/s per lane capacity using PAM-4 signaling of the VCSEL-based optical transceiver test vehicles in back-to-back configuration and up to 56 Gb/s for 500 m and 2 km transmission ...
Electronics Letters, 2018
2016 European Conference on Networks and Communications (EuCNC), 2016
ABSTRACT Optical RAM appears to be the alternative approach towards overcoming the “Memory Wall” ... more ABSTRACT Optical RAM appears to be the alternative approach towards overcoming the “Memory Wall” of electronics, suggesting the use of light in RAM cell mechanisms to enable memory access times in the psec-regime. In this paper we present our recent work on optical RAM cell configurations relying on SOA-based switching and latching elements. We review both their experimental and theoretical framework and discuss on the new architectural perspectives in RAM encoding/decoding structures and cache mapping schemes by introducing the WDM principles in the storage area.
Optical Fiber Communication Conference (OFC) 2022
A monolithically integrated plasmonic SiGe-BiCMOS electronic transmitter operating at 180 GBd is ... more A monolithically integrated plasmonic SiGe-BiCMOS electronic transmitter operating at 180 GBd is demonstrated. Such compact high-speed electronic-photonic integrated circuit (EPIC) transmitters are key components for future high-performance computing (HPC) and data center interconnects (DCI).
Optical Fiber Communication Conference (OFC) 2022
The first successful demonstration of real-time Ethernet trial services over an analog 2λ-WDM Fib... more The first successful demonstration of real-time Ethernet trial services over an analog 2λ-WDM Fiber-Wireless mmWave X-haul is experimentally reported, controlled through Open Daylight SDN controller for flexibly allocating capacity via a low-loss Si3N4 ROADM.
Zenodo (CERN European Organization for Nuclear Research), Mar 24, 2016
We propose a programmable optical fabric design for Data Center networks that extends SDN to L1. ... more We propose a programmable optical fabric design for Data Center networks that extends SDN to L1. We present experiments on our HPC/ML testbed leveraging the programmable network to automatically failover from hardware or software failures.
Zenodo (CERN European Organization for Nuclear Research), Feb 12, 2017
We experimentally demonstrate distributed denial of service (DDOS) attack identification using De... more We experimentally demonstrate distributed denial of service (DDOS) attack identification using Deep Learning over a photonic neuromorphic engine that supports both input signal and weight update at 50 GHz, reporting a Cohen’s κ-score of 0.636.
Zenodo (CERN European Organization for Nuclear Research), Feb 12, 2017
Journal of Optical Communications and Networking, Apr 12, 2022
The deployment of the new 5G system and ultra-broadband access networks, on one side, and the adv... more The deployment of the new 5G system and ultra-broadband access networks, on one side, and the advent of network disaggregation and cloudification paradigms, on the other, are producing disruptive changes in metropolitan area networks (MANs). The new central offices will be more like small data centers than traditional Telco-type central offices. The presence of general-purpose servers, in partial or total replacement of specialized equipment or cards, and also hosting new functions and services, significantly changes the way the central office is organized and how the equipment internetworks. After having defined a reference architecture named cloudified-MAN, the paper briefly introduces the enabling technologies that include information technology (IT) systems, packet switches, and optical equipment. A disaggregated model is applied to all layers and systems. In the optics field, special insight on high data rate (up to 1.6 Tb/s) transceiver technology developed by the TERIPHIC project is provided as an example of low-cost and low-power technology. Through a quantitative techno-economic case study on a realistic network scenario aimed at short-term and medium-term time horizons, the paper provides indications on what could be the impact of the new architecture on costs and energy consumption. The main outcome of the study is that the IT and optical parts are those with the highest fractions of overall cost, and specifically for the optics, the cost of wavelength division multiplexing transceivers increases significantly in the medium term due to the demand for high-capacity connections (>400Gb/s), while the line system cost (reconfigurable optical add-drop multiplexer) decreases in percentage. Another significant result is that in terms of energy consumption, the IT component has been found to be the dominant one (70%–75% of the total), followed by packet devices (about 20%–25%) and optical systems, the latter with significantly lower percentage values (less than 5%) in all cases analyzed.
Optical Fiber Communication Conference (OFC) 2023
We propose a novel co-packaged optical transceiver architecture capable of operating at 112 Gbaud... more We propose a novel co-packaged optical transceiver architecture capable of operating at 112 Gbaud per lane and scalable to 1.6 Tb/s capacity and beyond for next generation 51.2T and 102.4T digital switches.
Journal of Lightwave Technology
2022 Italian Conference on Optics and Photonics (ICOP)
Photonics in Switching and Computing 2021, 2021
We analyze the design of O-band SOA-based switch architectures in the IMOS platform. Emulated 16×... more We analyze the design of O-band SOA-based switch architectures in the IMOS platform. Emulated 16×16 switches, designed with different architectures, show a worst-case 3dB penalty for the case of 7 cascaded SOAs with 4-channel WDM@25Gbps.
2018 European Conference on Optical Communication (ECOC), 2018
We present our vision towards scaling optical interconnect signalling rates to 200 Gb/s per lane ... more We present our vision towards scaling optical interconnect signalling rates to 200 Gb/s per lane within European project plaCMOS. The concept of a monolithic integration platform combining silicon photonics, plasmonics and SiGe-BiCMOS electronics is introduced and recent progresses are reported.
Applied Sciences, 2019
The soaring demand for higher speeds in datacenters to address the relentless growth of the globa... more The soaring demand for higher speeds in datacenters to address the relentless growth of the global IP traffic places optical interconnects in the spotlight. In this manuscript, we present a high-speed optical transceiver for intra-datacenter connectivity. The transceiver is based on single-mode, single-polarization high-speed vertical-cavity surface-emitting lasers (VCSELs), a VCSEL driver chip, and a linear receiver. Following a step-by-step approach, we present the architectures, assembly processes, and experimental results from the different modules. More specifically, we demonstrate (1) a data transmission experiment at 80 Gb/s using PAM-4 (four-level Pulse Amplitude Modulation) modulation for a reach of up to 500 m by employing a single-mode VCSEL module, and (2) a full-link experiment proving up to 64 Gb/s per lane capacity using PAM-4 signaling of the VCSEL-based optical transceiver test vehicles in back-to-back configuration and up to 56 Gb/s for 500 m and 2 km transmission ...
Electronics Letters, 2018
2016 European Conference on Networks and Communications (EuCNC), 2016
ABSTRACT Optical RAM appears to be the alternative approach towards overcoming the “Memory Wall” ... more ABSTRACT Optical RAM appears to be the alternative approach towards overcoming the “Memory Wall” of electronics, suggesting the use of light in RAM cell mechanisms to enable memory access times in the psec-regime. In this paper we present our recent work on optical RAM cell configurations relying on SOA-based switching and latching elements. We review both their experimental and theoretical framework and discuss on the new architectural perspectives in RAM encoding/decoding structures and cache mapping schemes by introducing the WDM principles in the storage area.
Optical Fiber Communication Conference (OFC) 2022
A monolithically integrated plasmonic SiGe-BiCMOS electronic transmitter operating at 180 GBd is ... more A monolithically integrated plasmonic SiGe-BiCMOS electronic transmitter operating at 180 GBd is demonstrated. Such compact high-speed electronic-photonic integrated circuit (EPIC) transmitters are key components for future high-performance computing (HPC) and data center interconnects (DCI).
Optical Fiber Communication Conference (OFC) 2022
The first successful demonstration of real-time Ethernet trial services over an analog 2λ-WDM Fib... more The first successful demonstration of real-time Ethernet trial services over an analog 2λ-WDM Fiber-Wireless mmWave X-haul is experimentally reported, controlled through Open Daylight SDN controller for flexibly allocating capacity via a low-loss Si3N4 ROADM.