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Related Experiment Videos

Systematic design process for slanted grating couplers.

Bin Wang1, Jianhua Jiang, Gregory P Nordin

  • 1Moxtek, Inc., 452 West 1260 North, Orem, Utah 84057, USA.

Applied Optics
|August 8, 2006
PubMed
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We created a systematic design process for slanted grating couplers (SGCs) that significantly reduces simulation time. This method achieves performance comparable to complex optimization techniques with far fewer computational resources.

Area of Science:

  • Photonics and Nanophotonics
  • Integrated Optics
  • Waveguide Devices

Background:

  • Slanted grating couplers (SGCs) are essential for efficiently coupling light into integrated photonic circuits.
  • Existing design methods, such as micro-genetic algorithms (muGA) with 2D finite-difference time-domain (2D FDTD) simulations, are computationally intensive.
  • Optimizing SGCs for strong coupling requires careful consideration of phase-match and Bragg conditions.

Purpose of the Study:

  • To develop a systematic and computationally efficient design process for SGCs operating in the strong coupling regime.
  • To demonstrate that this new design process yields performance comparable to existing optimization methods.
  • To significantly reduce the computational time required for SGC design.

Main Methods:

Related Experiment Videos

  • Utilized rigorous analysis of SGC properties, including k-vector diagrams and a grating leaky-mode solver.
  • Intentionally enforced phase-match and Bragg conditions through the systematic design approach.
  • Incorporated a minimal number of 2D FDTD simulations in the final design stages.

Main Results:

  • The systematic design process achieves performance similar to SGCs designed using muGA and 2D FDTD.
  • The new method requires only two 2D FDTD simulations, drastically reducing computational cost.
  • Demonstrated the effectiveness of the systematic design process with an embedded SGC example.

Conclusions:

  • A novel, systematic design process for SGCs has been successfully developed.
  • This method offers a significant advantage in terms of design time and computational efficiency.
  • The developed process provides a practical alternative for designing high-performance SGCs.