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Team Desu

Basudde Kajubi Jason Talbot Ekene Uzoma Serge Zhilyaev. Team Desu. Optical Modulator. Background and Motivation. Evolution in laser technology - The available bandwidth has increased. - Output wavelength can be tuned New shutter technology needed

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Team Desu

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  1. Basudde Kajubi Jason Talbot Ekene Uzoma Serge Zhilyaev Team Desu Optical Modulator

  2. Background and Motivation • Evolution in laser technology - The available bandwidth has increased. - Output wavelength can be tuned • New shutter technology needed - System to block range of wavelengths. • Infrared modulator - IR modulator less developed • High spec in open transmission

  3. Background and Motivation • Modulator using oxide shutter - Vanadium oxide is implemented - Thermochromic property • Open/Closed mode operations - Open mode transmittance is high - Closed mode reflectance occurs

  4. The Design • Deposit oxide on glass panel by sol-gel method • Design a micro heater attached to glass • Add photodetector for display • Implement testing system for shutter characterization

  5. Melt VO2 at 600C Pour it in water Spin it 3-5 times The higher the speed, the lower the thickness Fire film at 500C for about 2 hours 15g per 500ml of distilled water Sol Gel Process

  6. Derivation of Design Algorithm • Goal? • Power Calculation • Energy (heat calculation) • Relationship between heat and power • Resistance, Resistivity, length, Area? • Current Density requirements

  7. Actual Design • Reason For Design • Restrictions on Design • Possible Improvements

  8. Photodetector and LED • 3.4um LED • Why PbSe? • Are they compatible?

  9. Deliverables of the Design Project • Produce optical shutter designed for 3-5um • Characterize the shutter for optical performance and switching time. • Evaluation of measurements would give guidelines development of the shutter in a real system. • Laser protection should have 50-70 % open transmission and less than 1 % closed transmission • The switching time from open to closed mode on the order of µs-ms.

  10. Design Alternative • Implementing modulator as real system • Can be used as data storage • Window coating application • Military applications

  11. MDR specifications • Make experimental thin films by depositing VO2 using the sol gel method • Configure a method for making heating appliance • Derive values and specifications for heating process • Experiment on the laser and photo detector settings • Look into making the project more efficient • Conduct tests on shutter characterization

  12. QUESTIONS AND COMMENTS

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