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Silicon Nitride Grating Coupler
The goal of this project is the design and optimization of grating couplers for minimal coupling loss in the silicon nitride platform. Target application is temperature and strain measurement.
Sensing with fiber optics is getting more attention in recent years. One of the main challenges is to bring the light from the fiber into a compact photonic integrated circuit (PIC). The PIC is needed for filtering and optical signal processing. Ultimately the filtered optical signal is coupled from the PIC into a photodiode to convert it into a corresponding electrical signal. For small footprint and compact design we will use grating couplers to couple light from the PIC to the photodiode.
Sensing with fiber optics is getting more attention in recent years. One of the main challenges is to bring the light from the fiber into a compact photonic integrated circuit (PIC). The PIC is needed for filtering and optical signal processing. Ultimately the filtered optical signal is coupled from the PIC into a photodiode to convert it into a corresponding electrical signal. For small footprint and compact design we will use grating couplers to couple light from the PIC to the photodiode.
Your goal is to design a grating coupler for the silicon nitride platform that couples light from the PIC into a photodiode. The design should be optimized for maximum coupling efficiency and fabrication robustness. To achieve this goal you will design and simulate the grating couplers using a program like COMSOL to optimize the geometry. In addition you can bring your own ideas to improve your design.
Your goal is to design a grating coupler for the silicon nitride platform that couples light from the PIC into a photodiode. The design should be optimized for maximum coupling efficiency and fabrication robustness. To achieve this goal you will design and simulate the grating couplers using a program like COMSOL to optimize the geometry. In addition you can bring your own ideas to improve your design.
Figure on the left depicts the vision of a temperature measurement unit using fiber bragg gratings (FBG) and a PIC for signal processing. Figure on the right shows the coupling of the optical signal from the PIC to a photodiode through grating coupler.
Figure on the left depicts the vision of a temperature measurement unit using fiber bragg gratings (FBG) and a PIC for signal processing. Figure on the right shows the coupling of the optical signal from the PIC to a photodiode through grating coupler.
Theory, Simulation and Design
Theory, Simulation and Design
Knowledge about optics and photonics is required. Experience with simulation software like COMSOL or Lumerical is advantageous but not required.
Knowledge about optics and photonics is required. Experience with simulation software like COMSOL or Lumerical is advantageous but not required.
ThesisProposal.pdf
