shayan final1 characterization of thermal phase shifters

CharacterizationofThermalPhaseShiftersinaSiliconPhotonics

ProcessShayanReza

Major:ElectricalEngineeringVenturaCollege

Mentor:TakakoHirokawaFacultyAdvisor:ProfessorClintSchowDepartmentofElectricalandComputer

Engineering

?-Globaldatatrafficisexpectedtoincreasebyafactorof4.5from11EB(1018bytes) permonthin2017to49EBpermonthin2020

[Cisco]

Opticalfibers:

-Arefasterthanelectroniccables-Containalargerbandwidth

- Aremoreenergy-efficient

Why Optical Switches?

Research Project GoalsCharacterizingtheefficiencyofthermalphaseshifters-Determinehowmuchpowerisneeded

Identifyoptimalheaterstructures-Determinewhichdesignisthemostefficient

TestStructureStructureofDevice

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.

Waveguide

-Minimizeopticalloss

Aligning Optical Fiber

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

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

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

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

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.