A.I.T. - Researcher Scientists




Researcher Scientists



CHRISTOS KOULOUMENTAS, MSc, Research Scientist CONTACT DETAILS Athens Information Technology 19.5 Km Markopoulo Avenue, 19002 Peania, Attiki, Greece P.O. Box 68 Phone: +302106682749 Fax: +302106682729 E-mail: ckou@ait.edu.gr SUMMARY OF QUALIFICATIONS Christos Kouloumentas received his Diploma in Electrical and Computer Engineering from the National Technical University of Athens in 2000 and his M.Sc. degree in Optoelectronics-Microelectronics from the Physics Department of University of Crete in 2004. In January 2001, he visited the international research center Deutsches Elektronen Synchrotron (DESY), in Hamburg Germany as a guest scientist, and worked on the design of the RF-system for the linear particle accelerator, being currently developed. In August 2001 he joined the Optical Communications Group of the Technical University Hamburg-Harburg (TUHH), as a research scientist, working within the frames of the ODUPE European Project (Optical Devices Using Photosensitivity for their Elaboration) on topics related to photosensitivity. He joined the “High speed Networks and Optical Communications” Group of Athens Information Technology Center as a research scientist in September 2005. His current research efforts focus on ultra-high speed, all-optical signal processing, exploiting fiber-based processing schemes. PROFESSIONAL EXPERIENCE Sept. 2005 – Present: Athens Information Technology Center, Greece Position: Research Scientist, Member of the Networks and Optical Communications Group. Aug. 2001 – Jul. 2002: Technical University Hamburg-Harburg, Germany Position: Research Scientist, Member of the Optical Communications Group. Responsibilities: Theoretical study, design and fabrication of an optical ΜΜΙ (Multi-Mode Interference) coupler using UV irradiation. Fabrication of various types of Fiber Bragg Gratings for use in WDM systems, as well as in systems of optical sensors. Investigation of photosensitive polymers for the fabrication of optical devices using UV irradiation. Jan. 2001 – Jun. 2002: Deutsches Elektronen Synchrotron, Germany Position: Guest Scientist, Member of the High Frequency for electrons department (MHF-E). Responsibilities: Design and fabrication of an RF, high-power (10 MW) T-combiner. Design of an RF, high–power matched load (absorber). PROJECT PARTICIPATION (AIT) Transparent Ring Interconnection (TRIUMPH), EU project, 4th IST Call, STREP. Participation in WP2 and WP4. (AIT) EU COST 288 Action, “Nanoscale and Ultrafast Photonics”. This Action will integrate the most promising telecom-and datacom -oriented topics, and act as a catalyst for research by improved collaboration and networking, and as a proactive collaboration on identified strategic research topics. Participation in WP2 and WP3. Participation in the Alpha-factor Round Robin measurements. (AIT) ePhoton/ONe +, 4th IST Call, NoE. Responsible for the JA 6 within the frames of VD-S. (AIT) EU COST291, “Towards Digital Optical Networks”. The project is funded by the EU and is focusing on optical processing for digital network performance, novel network architectures as well as a unified control plane, network resilience and service security. Participation in WG1 and a STSM hosted by the ORC, University of Southampton. (TUHH) ODUPE, “Optical Devices Using Photosensitivity for their Elaboration”, ODUPE has been a research training network for promoting training-through-research. The network has co-ordinated education and exchange of students and young scientists between laboratories working in the field of optical devices using UV induced properties of glasses. Participation as a member of the Optical Communications Group of the TUHH. (DESY) Tera electron volt Energy Superconducting Linear Accelerator (TESLA). A new large-scale facility (linear particle accelerator) is currently being planned and developed by an international collaboration at the Deutsches Elektronen-Synchrotron DESY in Hamburg, Germany. Participation in the design and construction of subsystems and devices of the RF system of TESLA, as a member of the MHF-E department (Guest Scientist) EDUCATION 2002 – 2004, University of Crete-FORTH MSc (2-year scheme) in Optoelectronics-Microelectronics Master Thesis (Laser & Applications Division-Biomedical Optics): “Development of a nonlinear microscope – Imaging of structures and processes of the nematode C. elegans using nonlinear microscopy” 1995 – 2000, National Technical University of Athens, Diploma (5-year scheme) in Electrical and Computer Engineering Specialized in Communications Diploma Thesis (Microwave and Fiber Optics Communications Lab): “Scattering analysis of the microwave ΤΕ10 mode within rectangular waveguide imposed by dielectric column of great dielectric constant” PUBLICATIONS Journals Published 1) Ch. Kouloumentas, A. Tzanakaki, and I. Tomkos, “Clock Recovery at 160 Gb/s and beyond, using a Fiber-Based Optical Power Limiter,” IEEE Photonics Technology Letters, 18, (22), (November 2006), pp. 2365-2367. 2) George Filippidis, Christos Kouloumentas, Dimitris Kapsokalyvas, Giannis Voglis, Nektarios Tavernarakis and Theodore G. Papazoglou, “Imaging of Caenorhabditis elegans samples and sub/cellular localization of new generation photo-sensitizers for photodynamic therapy, using non-linear microscopy,” Journal of Physics D: Applied Physics, 38 (2005), pp. 2625-2632. 3) George Filippidis, Christos Kouloumentas, Giannis Voglis, Fotini Zacharopoulou, Theodore G. Papazoglou, Nektarios Tavernarakis, “Imaging of Caenorhabditis elegans neurons by second-harmonic generation and two-photon excitation fluorescence,” Journal of Biomedical Optics, 10 (2), (March/April 2005). Under Review 4) Ch. Kouloumentas, N. Pleros, P. Zakynthinos, D. Petrantonakis, D. Apostolopoulos, O. Zouraraki, A. Tzanakaki, H. Avramopoulos, I. Tomkos, “Packet Clock Recovery Using a Bismuth Oxide Fiber-based Optical Power Limiter”, Optics Express, under review. Conferences Published 1) Ch. Kouloumentas, A. Tzanakaki, and I. Tomkos, “All-Optical Multicasting Subsystem with Regenerative Capabilities,” CSNDSP 2006, paper B3.1, Patras, 19-21 July 2006. 2) Ch. Kouloumentas, A. Tzanakaki, and I. Tomkos, “ All-Optical Clock Recovery at 160 Gb/s and beyond, based on a Fabry-Pérot Filter and Self-Phase Modulation Effect,” ICTON 2006, paper Th.B1.8, Nottingham UK, 19-22 June 2006. 3) Ch. Kouloumentas, A. Barlas, A. Tzanakaki, and I. Tomkos, “Performance Evaluation of 2R regenerator based on SPM in HNL fibers”, Workshop on “Design of next generation optical networks”, Belgium, 2006 4) S. Psilodimitrakopoulos, G. Filippidis, Ch. Kouloumentas, D. Yova, “Combined two-photon excited fluorescence and second harmonic generation imaging microscopy of collagen structures”, Conference on “Multiphoton Microscopy in the Biomedical Sciences VI”, Biomedical Optics 2006, SPIE’s Photonics West symposium, San Jose USA, 21-26 January 2006. 5) George Filippidis, Christos Kouloumentas, Giannis Voglis, Nektarios Tavernarakis, Theodore G. Papazoglou, “Imaging of Caenorhabditis elegans neurons by second-harmonic generation and two-photon excitation fluorescence,” Laser Olympics Conference, Hellenic Scientific Society of Laser’s Medical Applications, Eugenides Foundation, October 15-17, 2004. 6) George Filippidis, Christos Kouloumentas, George Skalkos, Giannis Voglis, Nektarios Tavernarakis, Theodore G. Papazoglou, “Imaging of Caenorhabditis elegans samples and sub/cellular localization of new generation photo-sensitizers for photodynamic therapy, using non-linear microscopy,” Laser Olympics Conference, Hellenic Scientific Society of Laser’s Medical Applications, Eugenides Foundation, October 15-17, 2004. Under Review 7) Ch. Kouloumentas, N. Pleros, P. Zakynthinos, D. Petrantonakis, D. Apostolopoulos, O. Zouraraki, A. Tzanakaki, H. Avramopoulos, I. Tomkos, “Optical Power Limiter Based on Bismuth Oxide Fiber and its Application for Packet Clock Recovery at 40 Gb/s”, OFC 2007, under review 8) Ch. Kouloumentas, and I. Tomkos, “Performance Study of a Fiber-Based in-Line Regeneration Scheme for Multichannel Operation at 40 Gb/s”, OFC 2007, under review. Other Publications/Presentations 1) Ch. Kouloumentas, H. Renner, E. Brinkmeyer, “UV-writing of multi-mode interference couplers,” Workshop of "Optical Devices Using Photosensitivity for their Elaboration", Hamburg, Jun. 10-11, 2002. 2) Ch. Kouloumentas, “Modeling and tolerance requirements of UV-written multi-mode interference couplers,” Workshop of "Optical Devices Using Photosensitivity for their Elaboration", Porto, Feb. 25-26, 2002. 3) Christos Kouloumentas, Fuhai Lu, “Design of a 10 MW T –Combiner,” Internal DESY Post, Hamburg, June 2001. AREAS OF TECHNICAL INTEREST All - Optical Signal Processing Ultra-high speed signal processing schemes (Multi-wavelength 2R regenerators, Clock Recovery circuits, Multicasting subsystems, OTDM/WDM converters), exploiting mainly fiber-based processors’ technology. Optical Packet/Burst Switching Node design, subsystems and techniques for OPS networks. High speed optical transmission Ultra-short pulse sources and compression schemes. Transmission properties and impairments. Biomedical Optics Nonlinear Microscopy, optical sensors. PROFESSIONAL MEMBERSHIPS Member of the Technical Chamber of Greece.