1. Mid-term review presentation 3rd August 2010
Spyridon Papadopoulos
Work Package 4 – Early Stage Researcher

2. Overview Introduction Training Technical aspects of my work
Dissemination
Conclusion

3. Introduction – My background
MEng in Electrical and Computer Engineering
MSc in Telecommunications
Technical Interests:
Optical Communications
Optoelectronics
Communication Systems and Networks

4. Training
CERN is a natural place for training: Experts in a variety of fields – all in one place!!
Also the level of expertise of the associated partners is exceptional
I had the opportunity to benefit from – and I would like to take the opportunity and thank:
My CERN supervisor and my section leader who have extensive knowledge of the field and they have always been willing to help me
The experienced researcher
My academic supervisors at University College London, which is the associated partner
My colleagues at the PH-ESE-BE section, who provided their help in a variety of technical aspects
People from other sections who helped me particularly during the requirements gathering phase

5. Training
During my fellowship I also had the chance to attend the following courses and seminars:
UCL course on Optical Sources and Components
UCL course on Optical Transmitter Characterization (Laboratory Course)
“The where, why and how of optical access” – Seminar on Passive Optical Networks, presented at CERN
I also had the opportunity to attend the following conferences:
European Conference on Optical Communication
London Communications Symposium
ITU Telecom World Exhibition visit

6. Training CERN French Language course Presentation Course
“Leaders in Science” – confidence building course
Secondments:
26 January – 22 March 2009: Attendance of UCL courses, experience in using optical communication systems simulation software, PhD enrollment
4 May 2010 – 19 May 2010: Laboratory work, meeting with expert in particular aspects of use of optoelectronic components

7. Technical Aspects
Versatile Link Project – Investigation of Passive Optical Network (PON) architectures for SLHC
Passive Optical Networks (PONs): Optical fiber access network primarily employing passive optical components and configured around a splitter/combiner or Arrayed Waveguide Grating (AWG)
The optical counterpart of xDSL, intended to deliver Gbps bandwidth to end users

8. Technical aspects Outcomes – so far:
Development of a Time Division Multiplexed (TDM) PON with fixed and deterministic latency for the distribution of Timing, Trigger and Control signals at the SLHC
Design and Simulation of a Wavelength Division Multiplexed (WMD) PON for data read-out at the SLHC – special features: high upstream bandwidth, downstream broadcasting

9. Dissemination Presentations:
Transceivers for Passive Optical Networks – ACEOLE 6-month meeting
Passive Optical Networks Transceiver Measurements – PH-ESE-BE meeting
Passive Optical Networks for Particle Physics Applications – London Communications Symposium 2009
Future PON Technologies and Architectures – PH-ESE-BE meeting
PON Simulation Studies – PH-ESE-BE meeting

10. Dissemination Papers:
“Passive Optical Networks for Particle Physics Applications”, London Communications Symposium 2009
“Passive Optical Networks in Particle Physics Experiments”, Topical Workshop on Electronics for Particle Physics, 2009
“A Passive Optical Network with Latency Monitoring Capability for the Distribution of Timing-Trigger and Control Signals in High Energy Physics Experiments” – (submitted for publication) IEEE Transactions on Nuclear Science

11. Conclusion
Passive Optical Networks, one of the most prominent candidates for the next-generation of access technologies, may be used at the SLHC
Use of PONs could lead to an easier to maintain architecture, with a number of other potential advantages (cost, upgradability, etc.)
Despite the unique set of requirements of the SLHC, the research outcomes can be extended and used in conventional applications
I strongly believe that the experience I have gained at CERN will greatly affect my career – and my life – in a positive way

12. Thank you
Any questions?