Team Desu
Basudde KajubiJason TalbotEkene UzomaSerge Zhilyaev
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
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
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
Sol Gel Process
• 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
Derivation of Design Algorithm
• Goal?
• Power Calculation
• Energy (heat calculation)
• Relationship between heat and power
• Resistance, Resistivity, length, Area?
• Current Density requirements
Actual Design
• Reason For Design
• Restrictions on Design
• Possible Improvements
Photodetector and LED
• 3.4um LED
• Why PbSe?
• Are they compatible?
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.
Design Alternative
• Implementing modulator as real system
• Can be used as data storage
• Window coating application
• Military applications
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
QUESTIONS AND COMMENTS
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