Download - Team Desu
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Team Desu
Basudde KajubiJason TalbotEkene UzomaSerge Zhilyaev
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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
![Page 3: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/3.jpg)
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
![Page 4: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/4.jpg)
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
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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
![Page 7: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/7.jpg)
Derivation of Design Algorithm
• Goal?
• Power Calculation
• Energy (heat calculation)
• Relationship between heat and power
• Resistance, Resistivity, length, Area?
• Current Density requirements
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Actual Design
• Reason For Design
• Restrictions on Design
• Possible Improvements
![Page 10: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/10.jpg)
Photodetector and LED
• 3.4um LED
• Why PbSe?
• Are they compatible?
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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.
![Page 12: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/12.jpg)
Design Alternative
• Implementing modulator as real system
• Can be used as data storage
• Window coating application
• Military applications
![Page 13: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/13.jpg)
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
![Page 14: Team Desu](https://reader035.vdocuments.mx/reader035/viewer/2022081503/56814689550346895db3ac9f/html5/thumbnails/14.jpg)
QUESTIONS AND COMMENTS