Slow-Light Photonic Crystal Waveguides Key Enabler For Future Optical Network Technologies - PowerPoint PPT Presentation

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Slow-Light Photonic Crystal Waveguides Key Enabler For Future Optical Network Technologies

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  1. Slow-Light Photonic Crystal WaveguidesKey Enabler For Future Optical Network Technologies PanagiotisKanakis, UOA Thomas Kamalakis, HUA Adonis Bogris, TEI of Athens 18thPanhellenic Conference on Informatics 2-4 October 2014

  2. Outline • Problems and limitations of electronics in optical network nodes. • Optical Transparency : PCW. • PCWapplications. • Designing slow-light PCW. • Conclusions.

  3. Problems and limitations

  4. Future Problems and Limitations • Future estimation. • Heat dissipation. • Quantum information (qubit)!!!

  5. Optical Transparency • Data format independence. • Opportunity to increase data rate beyond the capabilities of electronics. • Reduction of total power consumption (due to none or less electro-optic conversions). • Less need for heat dissipation techniques (i.e. increase of compactness). • Qubit friendly.

  6. Photonic Crystal Slab 1-D 3-D Slab Waveguide 3-D 2-D Bulk Crystal er: Dielectric constant of the RED material. eb: Dielectric constant of the BLUE material.

  7. Photonic Crystal Waveguide

  8. Photonic Crystal Waveguide (PCW) Standard W1 waveguide Dispersion Engineered Low Group Velocity Dispersion (GVD), β2 How does this help in optical transparency ?

  9. Photonic Crystal Waveguide (PCW) • Storage Capacity PCW • Wavelength Conversion

  10. Storage Capabilities of PCWs Delay BW Product (DBP) Maximum Storage Capacity Which is the best design? Considered design parameters

  11. Step by Step Optimization Process Design Parameters: Sequence of steps: 5th Step 1st Step 2nd Step

  12. Νmax : 1st Step (Rb=40Gb/s) Band Diagram Storage Capacity Group Index

  13. Νmax : 2nd Step (Rb=40Gb/s) Band Diagram Storage Capacity Group Index

  14. Νmax : 4th Step(Rb=40Gb/s) Band Diagram

  15. Νmax : 4th Step (Rb=100Gb/s) Band Diagram

  16. All-Optical RAM • Array of PCW bit memory. • Total buffering holding time: 168nsec. • Energy and power consumption 24fJ/bit and 10μW respectively. OFC/NFOEC, vol. 1, no. 3, pp. 6-10 March 2011

  17. Wavelength Conversion : FWM Conversion Efficiency Efficiency-BW-Tunability (EBT)

  18. Step-by-step Optimization Process * Unchanged parameter.

  19. Optimum PCW design

  20. Summing Up • We have presented a new design optimization method able to include multiple structural parameters. • New figure of merits (Nmax and EBT) include real aspects (like propagation loss, dispersion and Bandwidth capabilities) to the estimation of more realistic designs. • Generally it is still early for PCW optical memories. • Low capacities is currently the major drawback. • However in the future optical memories will not be an alternative but a necessity due to quantum information. Our opinion This research has been funded under the framework of the “Archimedes III: Funding of Research Groups in TEI of Athens” project of the “Education & Lifelong Learning Operational Programme.”

  21. Thank you.