WP-VD-S Optical Switching Systems Review Meeting Brussels, 23-24 May 2007

1. WP-VD-S Optical Switching SystemsReview MeetingBrussels, 23-24 May 2007 Martin Nordal Petersen COM•DTU Technical University of Denmark

2. WP-VD-S: Optical Switching Systems • Scope: Optical Switching Systems, Cross-connects, Burst switches, Packet switches • Co-Leaders: Lars Dittmann, DTU, and Kyriakos Vlachos, CTI • Advisory Board: The co-leaders form a mini-advisory board • Partners involved – 17 + collab. inst.PoliTO, PoliMI, SSSUP, UPV, IT, GET, IBBT, TU/e, UCL, UEssex, DTU, KTH, TUW, AIT, CTI, ICCS/NTUA, UoPelop

3. Technical Scope Key issues identified by partners as scope of work: • Optical Packet Switching • Optical Buffering • Wavelength Converter Usage Reduction • Optical Signal Monitoring • Packet Compression Techniques • Recovery Switching • Quality of Service in Switches • Physical Impairment Based Switching • Optical Clock Recovery • Wavelength Conversion by Nonlinear Effects • Optical Flip-Flops • Hybrid Optical Switch Architectures • GMPLS Optical Switch Nodes • Contention Resolution Schemes • OTDM Time-slot Switching • Multi-wavelength Regeneration • Optical Cross Connect • 2R Regeneration • OCDM encoders/decoders • Optical Multicast Architecture

4. Joint Activities 8 succesful Joint Activities (JAs) contributing to deliverables (out of 11 proposed in first year) • Study of Hybrid Optical Switch Architectures(Participants: CTI/UPATRAS - IBBT-Ghent University) • Switch and Buffer Architecture using Quantum Dot (QD) SOAs(Participants: RESIT/AIT - CTI/UPATRAS) • Tutorial on Optical Switching Technologies and Architectures (Participants: AIT, COM-DTU, DEIS-UNIBO, GET-ENST, IBBT, ICCS/NTUA, KTH, POLITO, PUT, CTI/UPATRAS, SSSUP, TUW, UC3M, UPVLC and UPCT.) • Demonstration and evaluation of a novel all-optical packet envelope detection circuit(Participants: ICCS/NTUA – CTI/UPATRAS) • Experimental demonstration of a simple all-optical clock recovery scheme(Participants: ICCS/NTUA – RESIT/Athens Information Technology) • Optoelectronic clock recovery(Participants: GET/ENST, DTU-COM) • Design and modelling of new all-optical architectures for contention resolution in AOLS nodes(Participants: IBBT/UGent, ICCS/NTUA) • Multi-domain Quality-of-Service in Optical Networks(Participants: SSSUP, COM-DTU)

5. Main Achievements Y1 • N° meetings and workhops: 3 meetings, partners attended 2 workshops • N° Joint papers: 24 • N° Public deliverables: 2 • N° joint project proposals: none (8 JAs started within the VD) • N° mobility actions: 9

6. Meetings and Workshops • VD-S Startup meeting, 24/05/2006, Copenhagen, Denmark (6 partners) • VD-S 1st Technical Meeting,10/10/2006,Athens, Greece (5 partners) • VD-S 2nd Technical Meeting 26/02/2007, Barcelona, Spain (15 partners)

7. Joint Papers - I Total joint papers produced in VD-S: 24

8. Joint Papers - II Total joint papers produced in VD-S: 24

9. Joint Papers by Partner

10. Mobility Actions Total Mobility Actions in VD-S: 9 • All-optical high speed wavelength converter based on XPM in HNLF (UPVLC-DTU) • “Label preference schemes in GMPLS optical networks” (SSSUP-DTU) • “QoS Mechanisms in Label-switched GMPLS Optical Networks” (DTU-SSSUP) • Test and characterize two types of market available integrated switches based on MZI-SOA (IT-UPVLC) • All-optical wavelength conversion by Four Wave Mixing in SOA/HNLF and Investigations on the subcarrier aided monitoring in all-optical switched networks using wavelength conversion. (DTU-UPVLC) • Switch and Buffer Architecture using Quantum Dot (QD) SOAs (CTI-AIT) • Experimental demonstration of a simple all-optical clock recovery scheme (AIT-NTUA) • Test and characterize multi-wavelength conversion properties of CIP integrated 40 Gb/s MZI-SOA (TUE-IT) • All-optical high speed wavelength converter based on XPM in HNLF (UPVLC-DTU)

11. Technical Activities - examples • Wavelength conversion using FWM in SOA’s. • Dispersion monitoring in optical networks using wavelength conversion. • Optical flip-flop based on Erbium-Ytterbium doped fibre

12. Wavelength conversion in optical networks Optimization of pump wavelength and pump power for best performance and better understanding. λ input data Wavelength conversion using FWM in a SOA λpump λ output data

13. Wavelength conversion using FWM in a SOA Power penalty as a function of the input signal power for different pump wavelengths and a pump power of 10 dBm Optical spectrum at the output of the SOA for different input signal powers: -4.5, 0.5 and 4 dBm. The signal and pump wavelengths are 1565.1 nm and 1563.7 nm, respectively and the pump power is 12 dBm

14. Dispersion monitoring in networks using wavelength conversion • How to monitor chromatic dispersion in networks using wavelength conversion (FWM)

15. Dispersion monitoring in a WC network Results: Setup: 40 Gb/s transmitter SMF λs=1565.0 nm OF EDFA MZI λs Sub-carrier 40 Gb/sNRZ data PPG Wavelength conversion by FWM Subcarrier detection λp=1563.2 nm SOA EDFA PC ESA 3 dB Dispersion monitoring 2λp-λs 2λp-λs

16. Role of an all-optical flip-flop in a packet switching network node Need of bi-stable devices Example of all-optical node Synchronous node architecture Packet time IN OUT Optical flip flop

17. t Reset pulses t Set pulses t out t t Operating principle stimulated emission absorption Fiber transparent Fiber not transparent Pulse width: 10 ns Rep. Frequency: ~ 900 kHz Pulse energy: 19.82 nJ Read Signal (1541 nm) Reset Pulses (1565 nm) circulator 1 CW 1541 nm 2 50/50 3 coupler Er3+/Yb fiber Set Pulses (1535 nm) t 1,5 m Pulse width: 10 ns Rep. Frequency: ~ 900 kHz Pulse energy: 18.48 nJ =1541 nm out

18. Criteria for VD Budget Allocation • Criteria: • Participation in Joint Activities • Mobility Actions under VDS and declared in a joint activity. • Joint Papers declared in a joint activity. • Responsivity • Contributions to Deliverables • Contributions to presentations requested • VDS meetings attended • Final Distribution • 0 for inactivity • 1000 € for low activity • 2000 € for active • 8500 € most active • +1000 € for contributing to tutorial paper (only no/low active)

19. Role and Contribution of Partners For VD Budget allocation, partners were categorized as Most Active: CTI, DTU, NTUA, SSSUP, UPVLC, AIT Active: IBBT Low Activity: PoliTO, PoliMI, UniBO, GET, TUe Inactive: UC3M, TUW, IT, KTH, ORC • Total VD budget to be allocated: 70k€ • 66.5k€ was divided to partners • 3.5k€ reserved for tutorial presentation at conference • 500€ for mobility with collaborating institution PUT

20. Resources employed: Effort 89% Permanent staff (AC): 5 m/m

21. Resources employed: Budget 108%

22. Plan for Second Year • Publish and present the E-Photon/ONe tutorial on “Photonics in Switching” (JA4) – to be submitted to Computer Networks on June 1 • Technical meeting at ONDM 2007 • Deliverables D3 and D4 • 5 new JAs proposed • 8 already successful JAs continue

23. Scientific and Technical Impact • A consensus on future technologies for optical switching systems has formed among partners and is summarized in the tutorial paper “Photonics in Switching”. • 24 joint papers published. • 2 deliverables reporting latest research results • EU-wide networking established through meetings and mobility actions.

24. Durable integration • Joint Activities are demonstrations of durable integration between partners. • Many VD-S partners in submitted proposal for COST Action SWIFT (SWItches and Routers for FuTure Communication and Data Processing)