Shayan FINAL1 Characterization of Thermal Phase Shifters ...
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CharacterizationofThermalPhaseShiftersinaSiliconPhotonics
ProcessShayanReza
Major:ElectricalEngineeringVenturaCollege
Mentor:TakakoHirokawaFacultyAdvisor:ProfessorClintSchowDepartmentofElectricalandComputer
Engineering
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?-Globaldatatrafficisexpectedtoincreasebyafactorof4.5from11EB(1018bytes) permonthin2017to49EBpermonthin2020
[Cisco]
Opticalfibers:
-Arefasterthanelectroniccables-Containalargerbandwidth
- Aremoreenergy-efficient
Why Optical Switches?
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Research Project GoalsCharacterizingtheefficiencyofthermalphaseshifters-Determinehowmuchpowerisneeded
Identifyoptimalheaterstructures-Determinewhichdesignisthemostefficient
TestStructureStructureofDevice
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Measuring Resistance of Heaters
-Tuningefficiency
Masood,A.,Pantouvaki,M.,LePage,G.,Verheyen,P.,VanCampenhout,J.,Absil,P.,VanThourhout,D.andBogaerts,W.(2013).Comparisonofheaterarchitecturesforthermalcontrolofsiliconcircuits.10th InternationalConferenceonGroupIVPhotonics.
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Waveguide
-Minimizeopticalloss
Aligning Optical Fiber
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R6
R5
R4
R3
R2
R1
R7
R8
R9
R10
R11
R12
Ohm’s Law:V=IR
-0.0015
-0.001
-0.0005
0
0.0005
0.001
0.0015
-4 -3 -2 -1 0 1 2 3 4
I(Amps)
V(Volts)
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
Resistance Measurements
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Voltage Sweep from 0-5V for R3
-75
-65
-55
-45
-35
-25
-15
-5 1544 1545 1546 1547 1548 1549 1550 1551
OpticalPow
er(d
B)
Wavelength(nm)
0V
5V
10V
15V
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Heater Efficiency at 1549.5 nm
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
01000 3000 5000 7000 9000 11000 13000 15000
OpticalPow
er(d
B)
ElectricalPower(W)
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
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Conclusions & Future work
• Smaller heater geometries tend to generate more heat, which is efficient for the switch.
• Continue to test heaters of varying dimensions in order to find optimal heater structure for optical switch
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Acknowledgements
Special thanks to my mentor, Takako Hirokawa for her guidance this summer as well as to my Faculty Advisor Professor Clint Schow for his support. I would also like to thank the IEE for funding my research.