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TASK 2 InP Traveling Wave Microresonator Filters

TASK 2 InP Traveling Wave Microresonator Filters. Cem Ozturk and Nadir Dagli University of California Santa Barbara, CA 93106 Tel: (805) 893-4847; Email: dagli@ece.ucsb.edu.

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TASK 2 InP Traveling Wave Microresonator Filters

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  1. TASK 2InP Traveling Wave MicroresonatorFilters Cem Ozturk and Nadir Dagli University of California Santa Barbara, CA 93106 Tel: (805) 893-4847; Email: dagli@ece.ucsb.edu

  2. ObjectiveImplementation of compact, tunable band-stop and band-pass filters integrated on the common platform for the SG-DBR and wavelength converter.ApproachTo employ traveling wave micro-resonator devices with adjustable gain.AccomplishmentsVarious micro-resonator device structures are studied and designed.Process development for fabrication is completed.Fabrication of a full chip is underway.

  3. General Resonator Overview Resonator Cavity DFR= b(l) LCavity Output Input Resonance : DFR = 2mp

  4. Resonator Transfer Function k2 The amount of power coupled in per pass aR The round-trip loss inside the resonator

  5. Challenge 1 Integration to the common platform allows lateral coupling only. Active WG Structure Passive WG Structure 1.9 mm 1.9 mm 2265 A Common WG Core

  6. Challenge 2 Compact design requires highly confined deeply etched waveguiding for the resonator cavity, making lateral coupling very challanging. WG Resonator WG Core

  7. Challenge 3 Resonator and the communication channel can overlap to increase coupling, but this creates undesirable reflections to the laser.

  8. Challenge 4 For Microdisc-Microring Resonators gain can be limited due to non radiative defects that may be created by deep etching.

  9. Microresonator Cavity with TIR Mirrors TIR Mirrors Active material Output Input L

  10. S-Bend Simulations Employing S-Bend Couplers is not practical L = 40 mm, Dx = 1 mm W = 3 mm, T = 2.0 mm Lstraight = 5 mm, g = 4.5 mm L = 200 mm, Dx = 5 mm W = 3 mm, T = 2.0 mm Lstraight = 5 mm No Appreciable Coupling Too Long

  11. Designed Travelling Wave TIR Mirror Resonator Band-stop Filters

  12. TIR Mirror Design SiN Mask SiO2 Mask

  13. FDTD SIMULATIONS R = 90%

  14. PROCESS DEVELOPMENT

  15. Compatible Fabrication Process

  16. Chip Layout

  17. Devices Under Fabrication Microdiscs WGs Mirrors Active Region After Regrowth

  18. Novel traveling wave resonator filters utilizing the existing material platform were developed, designed and simulated. We also designed and developed a fabrication process compatible with the fabrication of SG-DBR and wavelength converters. These filters can readily be integrated with other devices on the same platform. Fabrication of these filters are underway. Summary

  19. Future Work • Improvement of the free spectral range by making the coupling of power into the resonator wavelength selective. • Integrate filters with wavelength converters. • Demonstrate electronic tuning. • Demonstrate multi wavelength operation.

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