Prof. Hercules Avramopoulos Profile

Prof. Hercules Avramopoulos

Full Professor at National Technical Univ of Athens

SPIE Involvement:

Author

Publications (52)

Proceedings Article | 20 June 2024 Presentation + Paper

Presentation + Paper

Photonic sensors-assisted ML pipeline for precise control of curing process in advanced thermosetting composite manufacturing

Evrydiki Kyriazi, Georgios Petsinis, Ioannis Poulopoulos, Georgios Syriopoulos, Thenia Prousalidi, Geoffrey Neale, Mehdi Asareh, Panagiotis Toumasis, Charalampos Zervos, Alexandros Skordos, Hercules Avramopoulos

Proceedings Volume 12999, 129990W (2024) https://doi.org/10.1117/12.3022433

KEYWORDS: Sensors, Manufacturing, Process control, Photodetectors, Composite resins, Machine learning, Composites, Optical sensors, Data modeling, Control systems

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Proceedings Article | 20 June 2024 Presentation + Paper

Presentation + Paper

Design of a miniaturized MID-IR spectroscopy solution, based on a 400 nm SiPh platform, for the detection of CO2 and CH4

Georgios Syriopoulos, Charalampos Zervos, Giannis Poulopoulos, Evrydiki Kyriazi, Thenia Prousalidi, Pen-Sheng Lin, Frank Niklaus, Kristinn Gylfason, Nour Negm, Stephan Suckow, Max Lemme, Dimitris Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 12999, 129990N (2024) https://doi.org/10.1117/12.3022431

KEYWORDS: Waveguides, Reflectors, Silicon, Design, Bragg wavelengths, Bragg gratings, Mid infrared, Spectroscopy, Refractive index

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Proceedings Article | 18 June 2024 Poster + Paper

Poster + Paper

Machine learning-enhanced dual-task processor for next generation access networks

George Brestas, Giannis Kanakis, Maria Spyropoulou, Hercules Avramopoulos

Proceedings Volume 13017, 130170W (2024) https://doi.org/10.1117/12.3016286

KEYWORDS: Signal processing, Digital signal processing, Dispersion, Machine learning, Signal detection, Tunable filters, Passive optical networks, Optical transmission, Optical signal processing, Channel projecting optics

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Proceedings Article | 18 June 2024 Poster + Paper

Poster + Paper

Advanced machine learning-powered tunable optical signal processor for precise chromatic dispersion compensation in analog B5G/6G mobile fronthaul networks

Panagiotis Toumasis, George Brestas, Evrydiki Kyriazi, Konstantina Kanta, Giannis Poulopoulos, Giannis Giannoulis, Dimitris Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 13017, 130170Z (2024) https://doi.org/10.1117/12.3017029

KEYWORDS: Analog electronics, Tunable filters, Signal processing, Machine learning, Dispersion, Resonators, Radio optics, Photonic integrated circuits, Mathematical optimization, Radio over Fiber

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Proceedings Article | 18 June 2024 Presentation + Paper

Presentation + Paper

High performance grating couplers for mid-infrared applications based on multiparameter optimization of geometry characteristics

Thenia Prousalidi, Giannis Poulopoulos, Evrydiki Kyriazi, Georgios Syriopoulos, Nour Negm, Stephan Suckow, Charalampos Zervos, Dimitrios Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 13012, 1301205 (2024) https://doi.org/10.1117/12.3021966

KEYWORDS: Design, Optical gratings, Optical design, Mid infrared, Etching, Sensing systems, Fabrication, Tolerancing, Single mode fibers, Simulations

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Proceedings Article | 10 June 2024 Poster + Paper

Poster + Paper

Quantum PIC simulation tool for linear optical quantum computing gates

Argiris Ntanos, Giannis Giannoulis, Aristeidis Stathis, Dimitris Zavitsanos, Hercules Avramopoulos

Proceedings Volume 12993, 129930K (2024) https://doi.org/10.1117/12.3022597

KEYWORDS: Photonic integrated circuits, Quantum gates, Beam splitters, Quantum simulation, Quantum probability, Phase shifts, Device simulation

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Proceedings Article | 10 June 2024 Poster + Paper

Poster + Paper

Flat emission grating couplers design enabling optical antennas for high performance LIDAR systems

Thenia Prousalidi, Giannis Poulopoulos, Evrydiki Kyriazi, Georgios Syriopoulos, Peter Maat, Roel Botter, Charalampos Zervos, Dimitrios Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 12991, 1299118 (2024) https://doi.org/10.1117/12.3021971

KEYWORDS: Design, Simulations, LIDAR, Waveguides, Antennas, Optical design, Phased array optics, Optical antennas, Beam steering

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Proceedings Article | 13 March 2024 Presentation

Presentation

DV-QKD link integrated over multiple ONT loaded carrier-grade GPON for FTTH applications

Nikolaos Makris, Argiris Ntanos, Alkinoos Papageorgopoulos, Aristeidis Stathis, Persefoni Konteli, Iliana Tsoni, Giannis Giannoulis, Foteini Setaki, Theofanis Stathopoulos, George Lyberopoulos, Hercules Avramopoulos, George Kanellos, Dimitris Syvridis

Proceedings Volume PC12911, PC129110K (2024) https://doi.org/10.1117/12.3001045

KEYWORDS: Quantum key distribution, Fiber to the x, Industrial applications, Quantum systems, Quantum channels, Telecommunication networks, Quantum optics experiments, Quantum networks, Quantum enhancement, Quantum bit errors

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Proceedings Article | 12 March 2024 Poster + Paper

Poster + Paper

A novel photonic integrated optical divider based on cascaded multimode interference (MMI) couplers achieving a splitting ratio of 1:10e-9

L. Gounaridis, J. Gran, E. Katsaouni, C. Zervos, A. Raptakis, E. Kyriazi, G. Brestas, A. M. Grammatikaki, D. Geuzebroek, H. Avramopoulos, C. Kouloumentas

Proceedings Volume 12889, 128890Z (2024) https://doi.org/10.1117/12.3002772

KEYWORDS: Photonic integrated circuits, Waveguides, Design, Integrated optics, Tolerancing, Wave propagation, Sensors, Quantum measurement, Calibration, Multimode interference devices

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Proceedings Article | 12 March 2024 Poster + Paper

Poster + Paper

Integrated silicon Bragg-grating-based temperature sensor embedded in composite molds for out-of-autoclave composite parts process monitoring and optimisation

Charalampos Zervos, Georgios Syriopoulos, Evrydiki Kyriazi, Michal Szaj, Aggelos Poulimenos, Jeroen Missinne, Giannis Poulopoulos, Geert Van Steenberge, Hercules Avramopoulos

Proceedings Volume 12889, 128890T (2024) https://doi.org/10.1117/12.3001491

KEYWORDS: Sensors, Photonic integrated circuits, Composites, Temperature sensors, Bragg gratings, Photonics, Composite resins, Silicon, Design

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Proceedings Article | 11 March 2024 Poster + Paper

Poster + Paper

Photonic sensor-based machine learning for precise forecasting of cure time and temperature overshoot in resin transfer moulding

Evrydiki Kyriazi, Georgios Petsinis, Charalampos Zervos, Giannis Poulopoulos, Georgios Syriopoulos, Geoffrey Neale, Mehdi Asareh, Alexandros Skordos, Hercules Avramopoulos

Proceedings Volume 12893, 1289318 (2024) https://doi.org/10.1117/12.3001532

KEYWORDS: Data modeling, Machine learning, Composites, Manufacturing, Sensors, Photodetectors, Optical sensors, Composite resins, Education and training, Aerospace engineering

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Proceedings Article | 8 March 2024 Poster + Paper

Poster + Paper

Integrated broadband bent directional coupler for use in telescope interferometry in the visible (600 nm – 820 nm)

Giannis Poulopoulos, Georgios Syriopoulos, Evrydiki Kyriazi, Thenia Prousalidi, Dimitris Apostolopoulos, Xavier Haubois, Charalampos Zervos, Hercules Avramopoulos

Proceedings Volume 12882, 128820T (2024) https://doi.org/10.1117/12.3001472

KEYWORDS: Waveguides, Directional couplers, Telescopes, Wave propagation, Interferometry, Design, Silicon nitride, Electric fields, Astronomical telescopes, Astronomical interferometry

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SPIE Journal Paper | 2 December 2023 Open Access

Open Access

Silicon photonic temperature sensor: from photonic integrated chip to fully packaged miniature probe

Jeroen Missinne, Viktor Geudens, Giannis Poulopoulos, Michal Szaj, George Syriopoulos, Charalampos Zervos, Evridiki Kyriazi, Hercules Avramopoulos, Geert Van Steenberge

JOM, Vol. 4, Issue 01, 011005, (December 2023) https://doi.org/10.1117/12.10.1117/1.JOM.4.1.011005

KEYWORDS: Photonic integrated circuits, Sensors, Interfaces, Reflection, Bragg gratings, Bragg wavelengths, Temperature sensors, Optical gratings, Silicon photonics, Photodetectors

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Proceedings Article | 12 July 2023 Open Access

Open Access

Paper

MEO satellite-to-ground Decoy-State QKD links realistic performance analysis

Argiris Ntanos, Nikolaos Lyras, Dimitris Zavitsanos, Saif Anwar, Obada Alia, Giannis Giannoulis, George Kanellos, Athanasios Panagopoulos, Hercules Avramopoulos

Proceedings Volume 12777, 127772N (2023) https://doi.org/10.1117/12.2690001

KEYWORDS: Satellites, Quantum key distribution, Satellite to ground quantum key distribution, Telescopes, Satellite communications, Astronomical imaging, Atmospheric optics, Visibility, Turbulence, Signal attenuation

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Proceedings Article | 17 March 2023 Presentation + Paper

Presentation + Paper

Fully integrated Laser Doppler Vibrometer (LDV) based on hybrid 3D integration of silicon nitride and polymer photonic circuits with operation in the kHz regime

A. Raptakis, L. Gounaridis, M. Kleinert, M. Weigel, J. Epping, E. Schreuder, M. Wolfer, A. Draebenstedt, R. Pessina, P. Groumas, T. Aukes, V. Seyfried, N. Keil, R. Heideman, H. Avramopoulos, C. Kouloumentas

Proceedings Volume 12424, 124240A (2023) https://doi.org/10.1117/12.2650027

KEYWORDS: Waveguides, Polymers, Laser Doppler velocimetry, Modulation frequency, Polarization, Ferroelectric materials, Photonic integrated circuits, Integrated optics

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Proceedings Article | 17 March 2023 Poster + Paper

Poster + Paper

Demonstration of photonic temperature sensor for RTM-6 composite manufacturing process (180°C) integrated with PMOC system

Georgios Syriopoulos, Aggelos Poulimenos, Giannis Poulopoulos, Maria Poulimenou, Jeroen Missinne, Michal Szaj, Charalampos Zervos, Geert Van Steenberge, Hercules Avramopoulos

Proceedings Volume 12424, 1242416 (2023) https://doi.org/10.1117/12.2649992

KEYWORDS: Sensors, Control systems, Reflection, Polarization, Temperature sensors, Process control, Bragg gratings, Thermal optics, Silicon, Photodetectors

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Proceedings Article | 15 March 2023 Presentation + Paper

Presentation + Paper

Photonic integrated circuits for 5G-and-beyond networks: enabling the mmWave band and beyond with InP-based photomixers in integrated transceivers

Efstathios Andrianopoulos, Milan Deumer, Tianwen Qian, Nikolaos Lyras, Simon Nellen, Evangelos Pikasis, Georgia Ntouni, Eleftherios Loghis, Elias Tsirbas, David de Felipe, Panos Groumas, Christos Tsokos, Maria Massaouti, Christos Kouloumentas, Dimitrios Kritharidis, Robert Kohlhaas, Norbert Keil, Martin Schell, Hercules Avramopoulos

Proceedings Volume 12429, 1242904 (2023) https://doi.org/10.1117/12.2648079

KEYWORDS: Terahertz radiation, Receivers, Principal component analysis, Photonic integrated circuits, Signal detection, Waveguides

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Proceedings Article | 15 March 2023 Presentation + Paper

Presentation + Paper

Practical decoy-state sender implemented over analog RoF transmitters for secure 5G and beyond x-haul connections

Giannis Giannoulis, Argiris Ntanos, Aristeidis Stathis, Konstantina Kanta, Panagiotis Toumasis, Dimitris Zavitsanos, Nikolaos Lyras, Dimitrios Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 12429, 1242919 (2023) https://doi.org/10.1117/12.2649707

KEYWORDS: Photons, Quantum signals, Quantum key distribution, Radio over Fiber, Single photon avalanche diodes, Quantum transmitters, Quantum sources

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Proceedings Article | 15 March 2023 Poster + Paper

Poster + Paper

Entanglement-based QKD over LEO satellite-to-ground time-varying atmospheric channel

Argiris Ntanos, Nikolaos Lyras, Aristeidis Stathis, Dimitris Zavitsanos, Giannis Giannoulis, Athanasios Panagopoulos, Hercules Avramopoulos

Proceedings Volume 12413, 124131O (2023) https://doi.org/10.1117/12.2649702

KEYWORDS: Quantum key distribution, Satellites, Quantum communications, Atmospheric modeling, Turbulence, Telecommunications, Satellite communications, Optical communications, Observatories, Image segmentation

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Proceedings Article | 13 March 2023 Presentation + Paper

Presentation + Paper

A fully packaged silicon photonic Bragg grating temperature sensor with a compact back side interface based on a ball lens

Jeroen Missinne, Viktor Geudens, Steven Van Put, Giannis Poulopoulos, Michal Szaj, George Syriopoulos, Charalampos Zervos, Hercules Avramopoulos, Geert Van Steenberge

Proceedings Volume 12426, 124260F (2023) https://doi.org/10.1117/12.2647381

KEYWORDS: Photonic integrated circuits, Sensors, Interfaces, Bragg gratings, Reflection, Temperature sensors, Silicon photonics, Silica, Semiconducting wafers, Optical gratings

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Proceedings Article | 17 May 2022 Presentation + Paper

Presentation + Paper

Silicon photonics temperature and refractive index sensor for curing process monitoring in composite material industry

Ioannis Poulopoulos, Charalampos Zervos, Georgios Syriopoulos, Jeroen Missinne, Michal Szaj, Hercules Avramopoulos

Proceedings Volume 12139, 1213909 (2022) https://doi.org/10.1117/12.2621285

KEYWORDS: Bragg gratings, Sensors, Polarization, Refractive index, Composites, Photonics, Temperature sensors, Silicon, Thermal optics, Coating

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Composite materials offer significant performance advantages due to their lightweight, high-strength, and high stiffness. This led to their adoption in several industrial sectors with particular emphasis on the aerospace industry which has undergone a transformation towards a composite-dominated new standard. In order to respond to the increased demand, it is mandatory to focus on an efficient and well-controlled curing cycle of the resin, which will lead to a significant reduction of cost and an increase in production speed. We investigate, a photonic solution, able of measure key monitoring values that facilitate optimization of the curing process. Simulation and evaluation results on a bragg grating based photonic integrated sensor, developed in 220 nm Silicon-onInsulator platform, are presented. A multi-sensor deployment is considered, enabling monitoring of the temperature and the refractive index of the resin. Serially coupled bragg grating photonic elements will enable concurrent monitoring of both temperature and refractive index. Several bragg configurations have been investigated and experimentally evaluated, specifically regular and phase-shifted ones. Both TE and TM polarization operation sensors that have been designed and fabricated, will be presented. Their sensitivity on resin temperature and refractive index variation will be discussed, resulting in a comparative study outlining the benefits and disadvantages of each solution. Refractive index sensors are realized by employing post-processing etching techniques on Multi-Project-Wafer run fabricated silicon chips, on top of the periodic bragg grating element. The comparative study takes into consideration TE and TM polarization operation, regular and phase-shifted bragg grating configuration elements, while evaluating their sensitivity in temperature and refractive index variations. Temperatures considered are in the range of 27°C to 200°C, while refractive index values lay between 1.5 and 1.6. A Figure-of-Merit is proposed to facilitate the selection of multi-sensor deployment for specific temperature and refractive index ranges.

Proceedings Article | 17 May 2022 Presentation + Paper

Presentation + Paper

Portable FT-NIR spectroscopic sensor for detection of chemical precursors of explosives using advanced prediction algorithms

A. M. Grammatikaki, A. Raptakis, L. Gounaridis, A. Athanasopoulos, D. Gounaridis, P. Groumas, A. Dadoukis, E. Maltezos, L. Karagiannidis, E. Ouzounoglou, A. Amditis, H. Avramopoulos, C. Kouloumentas

Proceedings Volume 12139, 1213916 (2022) https://doi.org/10.1117/12.2624004

KEYWORDS: Near infrared, Sensors, Spectroscopy, Performance modeling, Near infrared spectroscopy, Urea, Chemical analysis, Explosives, Data modeling, Machine learning, Artificial intelligence, FT-IR spectroscopy, FT-NIR spectroscopy

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Proceedings Article | 5 March 2022 Presentation + Paper

Presentation + Paper

Miniaturized silicon photonics multi-sensor operating at high temperatures for use in composite materials industrial applications

Charalampos Zervos, Giannis Poulopoulos, Jeroen Missinne, Michal Szaj, Hercules Avramopoulos

Proceedings Volume 12008, 120080P (2022) https://doi.org/10.1117/12.2606053

KEYWORDS: Sensors, Composites, Bragg gratings, Photonics, Photonic integrated circuits, Temperature sensors

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Proceedings Article | 5 March 2021 Presentation + Paper

Presentation + Paper

The path to 1Tb/s and beyond datacenter interconnect networks: technologies, components, and subsystems

Maria Spyropoulou, Giannis Kanakis, Yuqing Jiao, Ripalta Stabile, Nicola Calabretta, Kevin Williams, Virginie Nodjiadjim, Romain Hersent, Agnieszka Konczykowska, Richard Schatz, Oskars Ozolins, Mahdieh Joharifar, Jakub Zvěřina, Martin Žoldák, Paraskevas Bakopoulos, Giannis Patronas, Hercules Avramopoulos

Proceedings Volume 11712, 117120G (2021) https://doi.org/10.1117/12.2582920

KEYWORDS: Transceivers, Switches, Optical components, Electronics, Wafer bonding, Standards development, Photonic integrated circuits, Multiplexing, Internet, Integrated optics

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Proceedings Article | 31 January 2020 Presentation + Paper

Presentation + Paper

An end-to-end 5G fiber wireless A-RoF/IFoF link based on a 60 GHz beamsteering antenna and an InP EML

Christos Vagionas, Eugenio Ruggeri, George Kalfas, Bogdan Sirbu, Yigal Leiba, Konstantina Kanta, Giannis Giannoulis, Christophe Caillaud, Giancarlo Cerulo, Franck Mallecot, Thiago Raddo, Agapi Mesodiakaki, Marios Gatzianas, Dimitris Apostolopoulos, Hercules Avramopoulos, Idelfonso Tafur-Monroy, Tolga Tekin, Amalia Miliou, Nikos Pleros

Proceedings Volume 11307, 113070A (2020) https://doi.org/10.1117/12.2544866

KEYWORDS: Antennas, Modulation, Analog electronics, Single mode fibers, Avalanche photodetectors, Wireless communications, Radio over Fiber, Radio optics, Clocks, Signal to noise ratio

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Proceedings Article | 31 January 2020 Presentation + Paper

Presentation + Paper

Enabling low-cost high-volume production compatible terabit transceivers with up to 1.6 Tbps capacity and 100Gbps per lane PAM-4 modulation for intra-data center optical interconnects up to 2km: The TERIPHIC project approach

P. Groumas, C. Tsokos, D. Felipe, U. Troppenz, R. Hersent, P. Bakopoulos, B. Atias, J. Y. Dupuy, A. Pagano, A. Chiado Piat, S. Kibben, L. Gounaridis, A. Raptakis, M. Seyfried, M. Moehrle, C. Kouloumentas, N. Keil, H. Avramopoulos

Proceedings Volume 11308, 113080C (2020) https://doi.org/10.1117/12.2545352

KEYWORDS: Transceivers, Prototyping, Digital signal processing, Polymers, Waveguides, Modulation, Integrated optics, Packaging, Palladium, Semiconducting wafers

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Proceedings Article | 4 March 2019 Presentation + Paper

Presentation + Paper

A new generation of high-speed electro-optical transceivers and flexible bandwidth wavelength selective switches for coherent DCI: the QAMeleon project approach

C. Zervos, M. Spyropoulou, I. Kanakis, I. Lazarou, K.-O. Velthaus, E. Rouvalis, G. Torfs, E. Goobar, R. Santos, N. Tessema, T. Lamprecht, T. Johansen, R. Hersent, H. Mardoyan, S. Dris, T. Alexoudi, P. Giardina, D. Roccato, G. Vickers, H. Avramopoulos

Proceedings Volume 10924, 109240E (2019) https://doi.org/10.1117/12.2509454

KEYWORDS: Waveguides, Digital signal processing, Polarization, Photonic integrated circuits, Photonics, Liquid crystal on silicon, Polymers, Switches, Transceivers, Modulation

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Proceedings Article | 4 March 2019 Paper

Paper

Polarization-insensitive glass-to-silicon photonics coupler

I. Poulopoulos, D. Kalavrouziotis, N. Psaila, D. Apostolopoulos, H. Avramopoulos

Proceedings Volume 10924, 1092417 (2019) https://doi.org/10.1117/12.2510111

KEYWORDS: Silicon, Waveguides, Polarization, Glasses, Finite-difference time-domain method, Wave propagation, Radio propagation, Phase matching, Interfaces, Photonics

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Proceedings Article | 4 March 2019 Paper

Paper

Design of ultra-compact multimode interference (MMI) couplers and high efficiency grating couplers in TriPleX platform as part of a photonic-based sensor

Lefteris Gounaridis, Panos Groumas, Erik Schreuder, Christos Tsokos, Elias Mylonas, Adam Raptakis, Rene Heideman, Hercules Avramopoulos, Christos Kouloumentas

Proceedings Volume 10921, 1092127 (2019) https://doi.org/10.1117/12.2510053

KEYWORDS: Brain-machine interfaces, Waveguides, Optical design, Refractive index, Photodetectors, Sensors, Biomedical optics, Biosensors, Silicon, Light, Photonic integrated circuits

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Proceedings Article | 4 March 2019 Paper

Paper

SiN-assisted polymer-to-SiPh adiabatic coupler optimization

G. Poulopoulos, D. Kalavrouziotis, D. Apostolopoulos, H. Avramopoulos

Proceedings Volume 10924, 109240N (2019) https://doi.org/10.1117/12.2510102

KEYWORDS: Silicon, Waveguides, Polymers, Interfaces, Wave propagation, Scattering, Polymer multimode waveguides, Surface roughness, Silicon photonics, Assembly tolerances

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Proceedings Article | 22 February 2018 Presentation + Paper

Presentation + Paper

Optical datacenter network employing slotted (TDMA) operation for dynamic resource allocation

P. Bakopoulos, K. Tokas, C. Spatharakis, I. Patronas, G. Landi, K. Christodoulopoulos, M. Capitani, A. Kyriakos, M. Aziz, D. Reisis, E. Varvarigos, E. Zahavi, H. Avramopoulos

Proceedings Volume 10538, 1053807 (2018) https://doi.org/10.1117/12.2292722

KEYWORDS: Switches, Switching, Optical switching, Field programmable gate arrays, Optical networks, Network architectures, Tunable lasers, Receivers, Interfaces

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Proceedings Article | 29 January 2018 Presentation + Paper

Presentation + Paper

Optical terabit transmitter and receiver based on passive polymer and InP technology for high-speed optical connectivity between datacenters

V. Katopodis, C. Tsokos, D. de Felipe, M. Spyropoulou, A. Konczykowska, A. Aimone, P. Groumas, J.-Y. Dupuy, F. Jorge, H. Mardoyan, R. Rios-Müller, J. Renaudier, P. Jennevé, F. Boitier, A. Pagano, M. Quagliotti, D. Roccato, T. K. Johansen, M. Tienforti, A. Vannucci, H.-G. Bach, N. Keil, H. Avramopoulos, Ch. Kouloumentas

Proceedings Volume 10561, 1056107 (2018) https://doi.org/10.1117/12.2290258

KEYWORDS: Transmitters, Receivers, Modulation, Waveguides, Polymers, Modulators, Integrated photonics, Photonic integrated circuits, High speed electronics

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Proceedings Article | 24 February 2017 Presentation + Paper

Presentation + Paper

Field-trial demonstration of an extended-reach GPON-supporting 60-GHz indoor wireless access

G. Giannoulis, N. Moraitis, N. Argyris, S. Dris, C. Lessi, S. Perdikouris, L. Kostikidou, D. Apostolopoulos, C. Spatharakis, I. Papafili, G. Agapiou, A. Panagopoulos, H. Avramopoulos

Proceedings Volume 10103, 101030M (2017) https://doi.org/10.1117/12.2252538

KEYWORDS: Radio over Fiber, Single mode fibers, Digital signal processing, Antennas, Analog electronics, Signal attenuation, Signal to noise ratio, Optical amplifiers, Receivers, Networks

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Proceedings Article | 16 February 2017 Paper

Paper

Integrated polymer polarization rotator based on tilted laser ablation

Giannis Poulopoulos, Dimitrios Kalavrouziotis, Jeroen Missinne, Erwin Bosman, Geert Van Steenberge, Dimitrios Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 10106, 101060C (2017) https://doi.org/10.1117/12.2250873

KEYWORDS: Polymers, Polarization, Waveguides, Polymer multimode waveguides, Laser ablation, Standards development, Photonic devices, Integration, Free space, Multiplexing, Silicon, Wave propagation, Optical testing, Mineralogy

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The ubiquitous need for compact, low-cost and mass production photonic devices, for next generation photonic enabled applications, necessitates the development of integrated components exhibiting functionalities that are, to date, carried out by free space elements or standard fiber equipment. The polarization rotator is a typical example of such tendency, as it is a crucial part of the PBS operation of future transceiver modules that leverage polarization multiplexing schemes for increasing the optical network capacity. Up to now, a variety of integrated polarization rotating concepts has been proposed and reported, relying, mainly, on special waveguide crossection configurations for achieving the rotation. Nevertheless, most of those concepts employ SiPh or III-V integration platforms, significantly increasing the fabrication complexity required for customizing the waveguide crossection, which in turn leads to either prohibitively increased cost or compromised quality and performance. In this manuscript we demonstrate the extensive design of a low-cost integrated polymer polarization rotator employing a right-trapezoidal waveguide interfaced to standard square polymer waveguides. First the crossection of the waveguide is defined by calculating and analyzing the components of the hybrid modes excited in the waveguide structure, using a Finite Difference mode solver. Mode overlaps between the fundamental polymer mode and each hybrid mode reveal the optimum lateral offset between the square polymer and the trapezoidal waveguide that ensures both minimum interface loss and maximized polarization rotation performance. The required trapezoidal waveguide length is obtained through EigenMode Expansion (EME) propagation simulations, while more than 95% maximum theoretical conversion efficiency is reported over the entire C-band, resulting to more than 13dB polarization extinction ratio. The polarization rotator design relies on the development of angled polymer waveguide sidewalls, employing the tilted laser ablation technology, currently available at CMST. Therefore, the aforementioned simulation steps adhere fully to the respective design rules, taking into account the anticipated fabrication variations

Proceedings Article | 15 March 2016 Paper

Paper

SiN-assisted flip-chip adiabatic coupler between SiPh and Glass OPCBs

Giannis Poulopoulos, Catherine Baskiotis, Dimitrios Kalavrouziotis, Lars Brusberg, Henning Schröder, Dimitrios Apostolopoulos, Hercules Avramopoulos

Proceedings Volume 9753, 975310 (2016) https://doi.org/10.1117/12.2208878

KEYWORDS: Glasses, Waveguides, Silicon, Optical printed circuit boards, Telecommunications, Silicon photonics, Refractive index, Photomasks, Silver, Ions, Wave propagation, Diffusion, Optical fibers

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Proceedings Article | 7 March 2016 Paper

Paper

112 Gb/s sub-cycle 16-QAM Nyquist-SCM for intra-datacenter connectivity

Paraskevas Bakopoulos, Stefanos Dris, Nikolaos Argyris, Christos Spatharakis, Hercules Avramopoulos

Proceedings Volume 9775, 97750A (2016) https://doi.org/10.1117/12.2211639

KEYWORDS: Optical interconnects, Modulation, Digital signal processing, Nyquist pulse, Multiplexing, Modulators, Receivers, Single mode fibers, Electronic filtering, Quadrature amplitude modulation, Transmitters

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Proceedings Article | 7 March 2016 Paper

Paper

Scaling single-wavelength optical interconnects to 180 Gb/s with PAM-M and pulse shaping

Stefanos Dris, Paraskevas Bakopoulos, Nikolaos Argyris, Christos Spatharakis, Hercules Avramopoulos

Proceedings Volume 9775, 977506 (2016) https://doi.org/10.1117/12.2208876

KEYWORDS: Signal detection, Optical interconnects, Pulse shaping, Modulation, Digital filtering, Singular optics, Data conversion, Electro optics, Single mode fibers, Digital signal processing, Nyquist pulse, Receivers, Modulators, Forward error correction

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Proceedings Article | 1 June 2015 Paper

Paper

SiN-assisted polarization-insensitive multicore fiber to silicon photonics interface

Giannis Poulopoulos, Dimitrios Kalavrouziotis, Paul Mitchell, John Macdonald, Paraskevas Bakopoulos, Hercules Avramopoulos

Proceedings Volume 9520, 95200E (2015) https://doi.org/10.1117/12.2179077

KEYWORDS: Glasses, Silicon, Waveguides, Polymers, Neodymium, Polarization, Cladding, Interfaces, Ions, Wave propagation

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Proceedings Article | 1 May 2015 Paper

Paper

Passive and electro-optic polymer photonics and InP electronics integration

Z. Zhang, V. Katopodis, P. Groumas, A. Konczykowska, J. Dupuy, A. Beretta, A. Dede, E. Miller, J. Choi, P. Harati, F. Jorge, V. Nodjiadjim, R. Dinu, G. Cangini, A. Vannucci, D. Felipe, A. Maese-Novo, N. Keil, H. Bach, Martin Schell, H. Avramopoulos, Ch. Kouloumentas

Proceedings Volume 9516, 951603 (2015) https://doi.org/10.1117/12.2179221

KEYWORDS: Polymers, Modulators, Electronics, Waveguides, Transmitters, Modulation, Eye, Neodymium, Control systems, Ceramics

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Proceedings Article | 2 May 2014 Paper

Paper

1550 nm VCSEL-based 0.48 Tb/s transmission scheme employing PAM-4 and WDM for active optical cables

S. Markou, S. Dris, D. Kalavrouziotis, H. Avramopoulos, N. Pleros, Dimitris Tsiokos

Proceedings Volume 9134, 913422 (2014) https://doi.org/10.1117/12.2052168

KEYWORDS: Vertical cavity surface emitting lasers, Wavelength division multiplexing, Modulation, Lithium, Data modeling, Active optical cables, Eye, Signal detection, Thermal modeling, Receivers

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Proceedings Article | 8 March 2014 Paper

Paper

Photonic integration enabling new multiplexing concepts in optical board-to-board and rack-to-rack interconnects

Dimitrios Apostolopoulos, Paraskevas Bakopoulos, Dimitrios Kalavrouziotis, Giannis Giannoulis, Giannis Kanakis, Nikos Iliadis, Christos Spatharakis, Johan Bauwelinck, Hercules Avramopoulos

Proceedings Volume 8991, 89910D (2014) https://doi.org/10.1117/12.2042586

KEYWORDS: Vertical cavity surface emitting lasers, Silicon, Optical interconnects, Modulation, Waveguides, Silicon photonics, Interfaces, Multiplexing, Glasses, Polarization

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Proceedings Article | 7 March 2014 Paper

Paper

High gain 1.3-μm GaInNAs SOA with fast-gain dynamics and enhanced temperature stability

D. Fitsios, G. Giannoulis, N. Iliadis, V.-M. Korpijärvi, J. Viheriälä, A. Laakso, S. Dris, M. Spyropoulou, H. Avramopoulos, G. Kanellos, N. Pleros, M. Guina

Proceedings Volume 8982, 898208 (2014) https://doi.org/10.1117/12.2037904

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Proceedings Article | 1 February 2014 Paper

Paper

Experimental demonstration of high spectral-efficiency transmission with a novel non-interferometric vector modulator and custom DSP algorithms for coherent PON architectures

I. Lazarou, C. Spatharakis, V. Katopodis, S. Dris, P. Bakopoulos, B. Schrenk, H. Avramopoulos

Proceedings Volume 9009, 90090I (2014) https://doi.org/10.1117/12.2038473

KEYWORDS: Modulators, Modulation, Digital signal processing, Quadrature amplitude modulation, Signal detection, Phase shift keying, Forward error correction, Demodulation, Phase shifts, Receivers

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Proceedings Article | 1 February 2014 Paper

Paper

Blind SNR estimation for QAM constellations based on the signal magnitude statistics

Stefanos Dris, Christos Spatharakis, Paraskevas Bakopoulos, Ioannis Lazarou, Hercules Avramopoulos

Proceedings Volume 9009, 900905 (2014) https://doi.org/10.1117/12.2034532

KEYWORDS: Signal to noise ratio, Quadrature amplitude modulation, Amplitude modulation, Digital signal processing, Statistical analysis, Receivers, Modulation, Interference (communication), Signal processing, Error analysis

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Proceedings Article | 10 May 2012 Paper

Paper

Design, fabrication, and characterisation of fully etched TM grating coupler for photonic integrated system-in-package

Oriol Gili-de-Villasante, Paul Tcheg, Bei Wang, Alpaslan Suna, Giannis Giannoulis, Ioannis Lazarou, Dimitrios Apostolopoulos, Hercules Avramopoulos, Nikos Pleros, Matthias Baus, Matthias Karl, Tolga Tekin

Proceedings Volume 8431, 84310G (2012) https://doi.org/10.1117/12.922846

KEYWORDS: Waveguides, Silicon, Optical design, Optical interconnects, Critical dimension metrology, Fiber couplers, CMOS technology, Polarization, Continuous wave operation, Structured optical fibers

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Proceedings Article | 21 April 2011 Paper

Paper

The European ICT-BOOM project: silicon photonic Tb/S routers for improved energy efficiency in optical networks

Annachiara Pagano, Emilio Riccardi, Christos Stamatiadis, Leontios Stampoulidis, Konstantinos Vyrsokinos, Hercules Avramopoulos

Proceedings Volume 8065, 80651B (2011) https://doi.org/10.1117/12.882970

KEYWORDS: Switching, Silicon photonics, Integrated optics, Waveguides, Silicon, Energy efficiency, Switches, Optical networks, Electronic components, Printed circuit board testing

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Proceedings Article | 24 January 2011 Paper

Paper

Parametric study of dielectric loaded surface plasmon polariton add-drop filters for hybrid silicon/plasmonic optical circuitry

A. Dereux, K. Hassan, J.-C. Weeber, N. Djellali, S. Bozhevolnyi, O. Tsilipakos, A. Pitilakis, E. Kriezis, S. Papaioannou, K. Vyrsokinos, N. Pleros, T. Tekin, M. Baus, D. Kalavrouziotis, G. Giannoulis, H. Avramopoulos

Proceedings Volume 7945, 794513 (2011) https://doi.org/10.1117/12.873165

KEYWORDS: Dielectric filters, Dielectrics, Integrated optics, Surface plasmon polaritons, Optical filters, Optical circuits, Silicon, Hybrid optics, Hybrid circuits, Surface plasmons

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Proceedings Article | 18 May 2010 Paper

Paper

The BOOM project: a new generation of photonic routing subsystems using hybrid integration on silicon-on-insulator waveguide boards

Leontios Stampoulidis, Konstantinos Vyrsokinos, Christos Stamatiadis, Hercules Avramopoulos, Lars Zimmermann, Karsten Voigt, Zhen Sheng, Dries Van Thourhout, Jochen Kreissl, Ludwig Mörl, Jens Bolten, Thorsten Wahlbrink, Fausto Gomez-Agis, Eduward Tangdiongga, Harmen Dorren, Annachiara Pagano, Emilio Riccardi

Proceedings Volume 7719, 771909 (2010) https://doi.org/10.1117/12.855958

KEYWORDS: Waveguides, Silicon, Resonators, Photodetectors, Microrings, Sensors, Silicon photonics, Photonic integrated circuits, Demultiplexers, Nanowires

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Proceedings Article | 19 November 2007 Paper

Paper

Progress in system design using integrated multi-element interferometric switches

E. Kehayas, G. Kanellos, L. Stampoulidis, G. Theophilopoulos, H. Avramopoulos

Proceedings Volume 6783, 67832F (2007) https://doi.org/10.1117/12.745195

KEYWORDS: Switches, Clocks, Switching, Eye, Integrated optics, Data conversion, Receivers, Picosecond phenomena, Multi-element lenses, Chemical elements

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SPIE Journal Paper | 1 March 2005

Header separation and reinsertion for 10-Gbit/s variable-length optical packets

A. Hatziefremidis, E. Kehayas, D. Tsiokos, G. T. Kanellos, L. Stampoulidis, N. Pleros, Hercules Avramopoulos

OE, Vol. 44, Issue 03, 035003, (March 2005) https://doi.org/10.1117/12.10.1117/1.1872052

KEYWORDS: Clocks, Switches, Nonlinear optics, Network architectures, Switching, Electronic filtering, Polarization, Nonlinear filtering, Ultrafast phenomena, Optical engineering

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SPIE Journal Paper | 1 December 2003

All-optical packet clock generation from decision pulses

Marios Kalyvas, K. Yiannopoulos, G. Theophilopoulos, Hercules Avramopoulos, George Guekos

OE, Vol. 42, Issue 12, (December 2003) https://doi.org/10.1117/12.10.1117/1.1624612

KEYWORDS: Clocks, Amplitude modulation, Optical filters, Polarization, Filtering (signal processing), Fabry–Perot interferometers, Optical amplifiers, Signal generators, Oscilloscopes, Semiconductor optical amplifiers

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SPIE Journal Paper | 1 February 2003

23-channel with 100-GHz spacing multi-wavelength laser source

Kyriakos Vlachos, Hercules Avramopoulos

OE, Vol. 42, Issue 02, (February 2003) https://doi.org/10.1117/12.10.1117/1.1536184

KEYWORDS: Optical filters, Phase modulation, Semiconductor lasers, Linear filtering, Laser sources, Fiber lasers, Dielectric polarization, Semiconductor optical amplifiers, Laser optics, Dense wavelength division multiplexing

Showing 5 of 52 publications

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